Keyword: radiation
Paper Title Other Keywords Page
MOBL01 Diagnostic Systems for the PAL-XFEL Commissioning electron, undulator, cavity, target 11
 
  • C. Kim, S.Y. Baek, H. J. Choi, J.H. Hong, H.-S. Kang, G. Kim, J.H. Kim, I.S. Ko, S.J. Lee, G. Mun, B.G. Oh, B.R. Park, D.C. Shin, Y.J. Suh, H. Yang
    PAL, Pohang, Kyungbuk, Republic of Korea
  
  In 2011, an X-ray Free-Electron-Laser project was started in the Pohang Accelerator Laboratory (PAL-XFEL). The construction of the PAL-XFEL was finished at the end of 2015, and the commissioning was started from April 2016. The electron beam energy of 10 GeV was achieved at the end of April and the bunch compression was tried in May. The undulator commissioning was started from June. During the commissioning process, various kinds of instruments were used for the beam parameter monitoring including beam position monitors, beam profile monitors, beam charge monitors, beam arrival-time monitors, and beam loss monitors. This work will introduce the PAL-XFEL diagnostic system which was used in the commissioning process.  
slides icon Slides MOBL01 [19.548 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOBL01  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG01 Design, Production and Tests of Button Type BPM for TAC-TARLA IR FEL Facility electron, simulation, FEL, impedance 27
 
  • M.T. Gundogan, O. Yavaş
    Ankara University, Faculty of Engineering, Tandogan, Ankara, Turkey
  • A.A. Aydin, E. Kasap
    Gazi University, Faculty of Arts and Sciences, Teknikokullar, Ankara, Turkey
  • Ç. Kaya
    Ankara University, Accelerator Technologies Institute, Golbasi / Ankara, Turkey
  
  Funding: Ankara University
Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) facility is proposed as an IR FEL and Bremsstrahlung facility as the first facility of Turkish Accelerator Center (TAC) in Golbasi Campus of Ankara University. TARLA is proposed to generate oscillator mode FEL in 3-250 microns wavelengths range and Bremsstrahlung radiation. It will consist of normal conducting injector system with 250 keV beam energy and two superconducting RF accelerating modules in order to accelerate the beam 15-40 MeV. The electron beam will be in both continuous wave (CW) and macro pulse (MP) modes. The bunch charge will be limited by 77pC and the average beam current will be 1 mA. To detect electron beam position inside beam line, BPM (Beam Position Monitor) has to use through beam line. Wall current monitor based systems button type TARLA BPM are briefly mentioned. In this study, simulation results of the calculations in CST, production and test studies for button type TARLA BPMs are presented. Mechanical and electronic designs, antenna simulations, and the latest testing procedures are determined for button type BPMs. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG01  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG14 The Use of Single-crystal CVD Diamond as a Position Sensitive X-ray Detector detector, synchrotron, photon, diagnostics 71
 
  • E. Griesmayer, P. Kavrigin, Ch. Weiss
    CIVIDEC Instrumentation, Wien, Austria
  • C. Bloomer
    DLS, Oxfordshire, United Kingdom
  
  Synchrotron light sources generate intense beams of X-ray light for beamline experiments, and the stability of these X-ray beams has a large impact on the quality of the experiments that can be performed. User experiments increasingly utilise micro-focus techniques, focusing the X-ray beam size to below 10 microns at the sample point, with beamline detectors operating at kHz bandwidths. Thus, there is a demand for non-invasive diagnostic techniques that can reliably monitor the X-ray beam position with sub-micron accuracy in order to characterise X-ray beam motion, at corresponding kHz bandwidths. Reported in this paper are measurements from single-crystal CVD diamond detectors, and a comparison with the previous-generation of polycrystalline CVD diamond detectors is offered. Single-crystal diamond is shown to offer superior uniformity of response to incident X-rays, and excellent intensity and position sensitivity. Measurements from single-crystal diamond detectors installed at Diamond Light Source are presented, and their use in feedback routines in order to stabilise the X-ray beam at the sample point is discussed.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG14  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG36 Timing Window and Optimization for Position Resolution and Energy Calibration of Scintillation Detector detector, timing, simulation, photon 123
 
  • J. Zhu, M.H. Fang, J. Wang, Z.Y. Wei
    NUAA, Nanjing, People's Republic of China
  
  The real event selection, timing resolution, position resolution and energy response of the EJ-200 plastic scintillation detector have been analyzed using timing window coincidence measurement. The detector was simulated based on Monte Carlo, including its geometry, energy deposition, photon collection and signal generation. The detection efficiency and the real events selection have been obtained while the background noise has been reduced by using two-end readout timing window coincidence. We developed an off-line analysis code, which is suitable for massive data from the digitizer. We set different coincidence timing windows, and did the off-line data processing respectively. We find the detection efficiency increases as the width of the timing window increases, and when the width of timing window is more than 10ns, the detection efficiency will slowly grow until it reaches saturation. Time, position and energy response have been measured by exposing to radioactive sources. The best timing window parameter as 16ns is obtained for on-line coincidence measurement, and the position resolution is up to 12cm. Energy response of the detector was linear within the experimental energy range*.
* L. Karsch, A. Bohm et al, "Design and Test of A Large-area Scintillation Detector for Fast Neutrons", Nuclear Instruments and Methods in Physics Research A, vol.460, pp.362-367, 2001. 		 
poster icon Poster MOPG36 [5.665 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG36  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG37 Comparative Study of Magnetic Properties for CERN Beam Current Transformers electron, impedance, monitoring, solenoid 127
 
  • S. Aguilera, H. Hofmann, P. Odier
    CERN, Geneva, Switzerland
  • S. Aguilera, H. Hofmann
    EPFL, Lausanne, Switzerland
  
  At CERN, the circulating beam current measurement is provided by two types of transformer, the Direct Current Current Transformer and the Fast Beam Current Transformer. Each transformer is built based on toroidal cores made from a soft magnetic material. Depending on the type of measurement to be performed these cores require different magnetic characteristics for parameters such as permeability, coercivity and the shape of the magnetisation curve. In order to study the effect of changes in these parameters on the current transformers, several interesting raw materials based on their as-cast properties were selected. The materials have been characterised to determine their crystallisation, melting and Curie Temperatures in order to determine suitable annealing processes to tailor their properties. They have been analysed by several techniques including Electron Microscopy and X-ray Diffraction. As-cast magnetic properties such as the permeability, the B-H curve and Barkhausen noise have also been measured to enable the study of the effect of thermal treatment in the microstructure of the alloys, and the correlation of this with the change in the magnetic properties.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG37  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG38 Characterization and Simulations of Electron Beams Produced From Linac-Based Intense THz Radiation Source electron, gun, linac, cathode 131
 
  • N. Chaisueb, S. Rimjaem, J. Saisut
    Chiang Mai University, Chiang Mai, Thailand
  • N. Kangrang
    Chiang Mai University, PBP Research Facility, Chiang Mai, Thailand
  
  Electron beams with a maximum energy of 2.5 MeV and a macropulse current of 1 A are produced from a thermionic RF-gun of the linear accelerator system at Chiang Mai University, Thailand. An RF rectangular waveguide and a side coupling cavity of the RF gun introduce asymmetric field distribution inside the gun cavities. To investigate the effect of the asymmetric field distribution on electron beam production and acceleration, measurements and simulations of the electron beam properties were performed. In this study we use well calibrated current transformers, alpha magnet energy slits, and a Michelson interferometer to measure the electron pulse current, the beam energy, and the bunch length, respectively. This paper presents the measurement data of the electron beam properties at various location along the beam transport line and compares the results with the beam dynamic simulations by using the particle tracking program ELEGANT. Moreover, the RF field feature and the cathode power were optimized in order to achieve the high qualities of the electron beam produced from the RF gun. This result implies and correlates to the electron back-bombardment effect inside the gun cavities.
* This work has been supported by the Thailand Center of Excellence in Physics, Faculty of science, Chiang Mai University, and the Science Achievement Scholarship of Thailand (SAST). 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG38  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG42 Test Results from the Atlas Hybrid Particle Detector Prototype detector, ion, electron, cathode 147
 
  • C. Dickerson, B. DiGiovine, L.Y. Lin
    ANL, Argonne, Illinois, USA
  • D. Santiago-Gonzalez
    LSU, Baton Rouge, USA
  
  Funding: This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under contract number DE-AC02-06CH11357.
At the Argonne Tandem Linear Accelerator System (ATLAS) we designed and built a hybrid particle detector consisting of a gas ionization chamber followed by an inorganic scintillator. This detector will aid the tuning of low intensity beam constituents, typically radioactive, with relatively high intensity (>100x) contaminants. These conditions are regularly encountered during radioactive ion beam production via the in-flight method, or when charge breeding fission fragments from the CAlifornium Rare Isotope Breeder Upgrade (CARIBU). The detector was designed to have an energy resolution of ~5% at a rate of 105 particles per second (pps), to generate energy loss and residual energy signals for the identification of both Z and A, to be compact (retractable from the beamline), and to be radiation hard. The combination of a gas ionization chamber and scintillator will enable the detector to be very versatile and be useful for a wide range of masses and energies. Design details and testing results from the prototype detector are presented in this paper. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG42  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG44 SNS RFQ Voltage Measurements Using X-Ray Spectrometer rfq, shielding, background, electron 154
 
  • A.P. Zhukov
    ORNL, Oak Ridge, Tennessee, USA
  
  Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725.
Absolute measurement of vane voltage is essential to understand RFQ transmission. We used a non-intrusive technique of bremsstrahlung X-ray measurement. Several windows were installed at SNS to allow measurement of the X-ray spectrum in different locations of the RFQ. A CdTe spectrometer was used to estimate spectrum cutoff energy that corresponds to the vane voltage. Different device setups are described as well as measurement accuracy and interpretation of experimental data. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG44  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG58 Coherent Diffraction Radiation Imaging Methods to Measure RMS Bunch electron, experiment, detector, simulation 198
 
  • R.B. Fiorito, C.P. Welsch
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • C.I. Clarke, A.S. Fisher
    SLAC, Menlo Park, California, USA
  • A.G. Shkvarunets
    UMD, College Park, Maryland, USA
  
  The measurement of the RMS bunch length with high resolution is very important for latest generation light sources and also a key parameter for the optimization of the final beam quality in high gradient plasma accelerators. In this contribution we present progress in the development of novel single shot, RMS bunch length diagnostic techniques based on imaging the near and far fields of coherent THz diffraction radiation (CTHzDR) that is produced as a charged particle beam interacts with a solid foil or an aperture. Recent simulation results show that the profile of a THz image of the coherent point spread function (CSF) of a beam whose radius is less than the PSF, i.e. the image produced by a single electron, is sensitive to bunch length and can thus be used as a diagnostic. The advantages and disadvantages of near field and far field imaging are examined and the results of a recent high energy (20 GeV) CTHzDR experiments at SLAC/FACET are presented. Plans for experiments to further validate and compare these imaging methods for both moderate and high energy charged particle beams are also discussed.  
poster icon Poster MOPG58 [1.067 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG58  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG59 Time Correlated Single Photon Counting Using Different Photon Detectors photon, operation, detector, synchrotron 201
 
  • L. Torino, U. Iriso
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  Time Correlated Single Photon Counting (TCSPC) is used in accelerators to measure the filling pattern and perform bunch purity measurements. The most used photon detectors are photomultipliers (PMTs), generally used to detect visible light; and Avalanche Photo-Diodes (APDs), which are often used to detect X-rays. At ALBA synchrotron light source, the TCSPC using a standard PMT has been developed and is currently in operation and further tests are performed using an APD. This work presents the experimental results using both detectors, and compares their performances.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG59  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG60 Development, Calibration and Application of New-Generation Dissectors With Picosecond Temporal Resolution electron, laser, operation, synchrotron 205
 
  • O.I. Meshkov, O. Anchugov, G.Y. Kurkin, A.V. Petrozhitskii, D.A. Shvedov, E.I. Zinin
    BINP SB RAS, Novosibirsk, Russia
  • V.L. Dorokhov
    BINP, Novosibirsk, Russia
  • P.B. Gornostaev, M.Ya. Schelev, E.V. Shashkov, A. V. Smirnov, A.I. Zarovskii
    GPI, Moscow, Russia
  
  A dissector is an electron-optical device designed for measurement of periodic light pulses of subnanosecond and picosecond duration. LI-602 dissector developed at BINP SB RAS is widely used for routine measurements of a longitudinal profile of electron and positron beams at BINP electron-positron colliders and other similar installations. LI-602 dissector is a part of many optical diagnostic systems and provides temporal resolution of about 20 ps. Recently a new generation of picosecond dissectors were created on the basis of the PIF-01/S1 picosecond streak-image tube designed and manufactured at the GPI Photoelectronics Department. The results of the measurements of instrument function of the new dissector based on PIF-01/S1, which were carried out in the static mode, showed that temporal resolution of the dissector can be better than 3-4 ps (FWHM). The results of temporal resolution calibration of the new-generation picosecond dissector, carried out at the specialized set-up based on a femtosecond Ti:sapphire laser, and recent results of longitudinal beam profile measurements at BINP accelerators are given in this work.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG60  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG61 AXD Measurements at SOLEIL dipole, electron, vacuum, photon 209
 
  • M. Labat, M. El Ajjouri, N. Hubert, D. Pédeau, M. Ribbens, M.-A. Tordeux
    SOLEIL, Gif-sur-Yvette, France
  
  A first prototype of in-Air X-ray Detector (AXD) has been installed on the SOLEIL storage ring. An AXD simply consists of a scintillator, an objective and a camera installed in air behind the absorber of the bending magnet's synchrotron radiation layer. The radiation vertical profile analysis easily enables to retrieve the vertical beam size of the electron beam at the source point. This simple diagnostics opens large perspectives of beam size measurement all around the ring for an accurate caracterization of the beam and improvment of its stability survey.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG61  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG62 Novel Grating Designs for a Single-Shot Smith-Purcell Bunch Profile Monitor detector, electron, vacuum, background 213
 
  • A.J. Lancaster, G. Doucas, H. Harrison, I.V. Konoplev
    JAI, Oxford, United Kingdom
  
  Funding: This work was supported by the STFC UK (grant ST/M003590/1) and the Leverhulme Trust (International Network Grant IN-2015-012). H. Harrison is supported by STFC UK and the JAI for her DPhil.
Smith-Purcell radiation has been successfully used to perform longitudinal profile measurements of electron bunches with sub-ps lengths. These measurements require radiation to be generated from a series of gratings to cover a sufficient frequency range for accurate profile reconstruction. In past systems the gratings were used sequentially and so several bunches were required to generate a single profile, but modern accelerators would benefit from such measurements being performed on a bunch by bunch basis. To do this the radiation from all three gratings would need to be measured simultaneously, increasing the mechanical complexity of the device as each grating would need to be positioned individually and at a different azimuthal angle around the electron beam. Investigations into gratings designed to displace the radiation azimuthally will be presented. Such gratings could provide an alternative to the rotated-grating approach, and would simplify the design of the single-shot monitor by reducing the number of motors required as all of the gratings could be positioned using a single mount. 		 
poster icon Poster MOPG62 [1.088 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG62  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG63 Recent Beam Size Measurement Result Using Synchrotron Radiation Inteferometer in TPS synchrotron, operation, synchrotron-radiation, shielding 217
 
  • M.L. Chen, H.C. Ho, K.H. Hsu, D.-G. Huang, C.K. Kuan, W.Y. Lai, C.J. Lin, S.Y. Perng, C.W. Tsai, T.C. Tseng, H.S. Wang
    NSRRC, Hsinchu, Taiwan
  
  Taiwan Photon Source (TPS) has operated in 2015. An optical diagnostic beam line is constructed in TPS 40th section for the diagnostics of the electron beam properties. One instrument of the optical diagnostic beam line is a synchrotron radiation interferometer, which is operated for monitoring the beam size. By improving the optical alignment and air disturbance, the beam size is performed stable. This paper presents the modifications and recent measurement results.  
poster icon Poster MOPG63 [1.815 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG63  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG66 Design and Experimental Tests of the SwissFEL Wire-Scanners electron, vacuum, FEL, operation 225
 
  • G.L. Orlandi, R. Ischebeck, C. Ozkan Loch, V. Schlott
    PSI, Villigen PSI, Switzerland
  • M. Ferianis, G. Penco
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  
  The SwissFEL wire-scanner (WSC) composes of an in-vacuum beam-probe - motorized by a stepper motor - and an out-vacuum pick-up of the wire-signal. In SwissFEL, WSCs will absolve two main tasks: high precision measurement of the beam profile for determining the beam emittance as a complement to view-screens; routine monitoring of the beam profile under FEL operations. In order to fulfill the aforementioned tasks, the design of the in-vacuum component of the SwissFEL WSCs followed the guidelines to ensure a mechanical stability of the scanning wire at the micrometer level as well as a significative containment of the radiation-dose release along the machine thanks to the choice of metallic wires with low density and Atomic number. Beam-loss monitors have been suitably designed to ensure a sufficient sensitivity and dynamics to detect signals from scanned beams in the charge range 10-200 pC. The design, the prototyping phases, the bench and electron-beam tests - performed at SITF (Paul Scherrer Institut) and FERMI (Elettra, Trieste) - of the entire SwissFEL WSC set-up will be presented.
Contribution accepted for publication in Physical Review Accelerators and Beams 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG66  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG69 Study of YAG Exposure Time for LEReC RF Diagnostic Beamline electron, diagnostics, simulation, kicker 233
 
  • S. Seletskiy, T.A. Miller, P. Thieberger
    BNL, Upton, Long Island, New York, USA
  
  The LEReC RF diagnostic beamline is supposed to ac-cept 250 us long bunch trains of 1.6 MeV ' 2.6 MeV (kinetic energy) electrons. This beamline is equipped with a YAG profile monitor. Since we are interested in observ-ing only the last bunch in the train, one of the possibilities is to install a fast kicker and a dedicated dump upstream of the YAG screen and related diagnostic equipment. This approach is expensive and challenging from an engineer-ing point of view. Another possibility is to send the whole bunch train to the YAG screen and to use a fast gated camera to observe the image from the last bunch only. In this paper we demonstrate the feasibility of the last ap-proach, which significantly simplifies the overall design of the RF diagnostic beamline.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG69  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG70 Transverse Beam Profiling and Vertical Emittance Control with a Double-Slit Stellar Interferometer controls, electron, coupling, optics 236
 
  • W.J. Corbett, X. Huang, J. Wu
    SLAC, Menlo Park, California, USA
  • C.L. Li, W.J. Zhang
    East China University of Science and Technology, Shanghai, People's Republic of China
  • T.M. Mitsuhashi
    KEK, Ibaraki, Japan
  • Y.H. Xu
    DongHua University, Songjiang, People's Republic of China
  • W.J. Zhang
    University of Saskatchewan, Saskatoon, Canada
  
  Double-slit interferometers are useful tools to measure the transverse the cross-section of relativistic charged particle beams emitting incoherent synchrotron radiation. By rotating the double-slit about the beam propagation axis, the transverse beam profile can be reconstructed including beam tilt at the source. The interferometer can also be used as a sensitive monitor for vertical emittance control. In this paper we outline a simple derivation of the Van Cittert-Zernike theorem, present results for a rotating double-slit measurement and demonstrate application of the interferometer to vertical emittance control using the Robust Conjugate Direction Search (RCDS) optimization algorithm.  
poster icon Poster MOPG70 [1.362 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG70  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG71 Polarization Measurement and Modeling of Visible Synchrotron Radiation at Spear3 polarization, extraction, synchrotron, synchrotron-radiation 240
 
  • C.L. Li, W.J. Zhang
    East China University of Science and Technology, Shanghai, People's Republic of China
  • W.J. Corbett
    SLAC, Menlo Park, California, USA
  • Y.H. Xu
    DongHua University, Songjiang, People's Republic of China
  • W.J. Zhang
    University of Saskatchewan, Saskatoon, Canada
  
  Synchrotron radiation from dipole magnets is linearly polarized in the plane of acceleration and evolves toward circular polarization with increasing vertical observation angle. The intensity of the x-y field components can be modeled with Schwinger's theory for the angular-spectral power distribution. Combined with Fresnel's laws for reflection at a mirror surface, it is possible to model field polarization of visible SR light in the laboratory. The polarization can also be measured with a polarizer and quarter wave plate to yield Stokes' parameters S0-S3. In this paper we present measurements and modeling of the visible SPEAR3 SR beam in terms of Stokes' parameters and plot on the results on the Poincaré sphere.  
poster icon Poster MOPG71 [1.527 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG71  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG73 Transverse Beam Size Diagnostics using Brownian Nanoparticles at ALBA synchrotron, scattering, diagnostics, synchrotron-radiation 248
 
  • M. Siano, B. Paroli, M.A.C. Potenza
    Universita' degli Studi di Milano & INFN, Milano, Italy
  • A. Goldblatt, S. Mazzoni, G. Trad
    CERN, Geneva, Switzerland
  • U. Iriso, A.A. Nosych, L. Torino
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  In this work we describe a novel beam diagnostic method based on coherence characterization of broad-spectrum bending magnet radiation through the Heterodyne Near Field Scattering (HNFS) technique. HNFS is a self-referencing technique based on the interference between the transmitted beam and the spherical waves scattered by each particle of a colloidal suspension. The resulting single-particle interferogram shows circular fringes modulated by the spatio-temporal Complex Coherence Factor (CCF) of the radiation. Superposition of a number of these patterns results in a stochastic speckle field, from which spatial and temporal coherence information of the source can be retrieved in near field conditions. Here we describe the basics of this technique, the experimental setup mounted along the hard X-ray pinhole at the ALBA synchrotron light source, and the possibility of transverse electron beam size retrieval from the spatial coherence function of the emitted dipole radiation. We also show preliminary results concerning power spectral density of visible synchrotron radiation as obtained from temporal coherence.  
poster icon Poster MOPG73 [1.804 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG73  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG76 A Scintillating Fibre Beam Profile Monitor for the Experimental Areas of the SPS at CERN detector, ion, photon, proton 261
 
  • I. Ortega Ruiz, J. Spanggaard, G. Tranquille
    CERN, Geneva, Switzerland
  • A. Bay, G.J. Haefeli
    EPFL, Lausanne, Switzerland
  
  The CERN Super Proton Synchrotron (SPS) delivers a wide spectrum of particle beams (hadrons, leptons and heavy ions) that can vary greatly in momentum and intensity. The profile and position of these beams are measured using particle detectors. However, the current systems show several problems that limit the quality of such monitoring. We have researched a new monitor made of scintillating fibres read-out with Silicon Photomultipliers (SiPM), which has the potential to perform better in terms of material budget, range of intensities measured and available detector size. In addition, it also has particle counting capabilities, extending its use to spectrometry or Time-Of-Flight measurements. Its radiation hardness is good to guarantee years of functioning. We have successfully tested a first prototype of this detector with different particle beams at CERN, giving accurate profile measurements over a wide range of energies and intensities. It only showed problems during operation with lead ion beams, believed to come from crosstalk between the fibres. Investigations are ongoing on alternative photodetectors, the electronics readout and solutions to the fibre crosstalk.  
poster icon Poster MOPG76 [2.611 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG76  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPG78 Scintillation and OTR Screen Characterization with a 440 GeV/c Proton Beam in Air at the CERN HiRadMat Facility proton, photon, vacuum, controls 268
 
  • S. Burger, B. Biskup, S. Mazzoni, M. Turner
    CERN, Geneva, Switzerland
  • B. Biskup
    Czech Technical University, Prague 6, Czech Republic
  • M. Turner
    TUG/ITP, Graz, Austria
  
  Beam observation systems, based on charged particles passing through a light emitting screen, are widely used and often crucial for the operation of particle accelerators as well as experimental beamlines. The AWAKE experiment, currently under construction at CERN, requires a detailed understanding of screen sensitivity and the associated accuracy of the beam size measurement. We present the measurement of relative light yield and screen resolution of seven different materials (Chromox, YAG, Alumina, Titanium, Aluminium, Aluminium and Silver coated Silicon). The Chromox and YAG samples were additionally measured with different thicknesses. The measurements were performed at the CERN's HiRadMat test facility with 440 GeV/c protons, a beam similar to the one foreseen for AWAKE. The experiment was performed in an air environment.  
poster icon Poster MOPG78 [2.795 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOPG78  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG04 CERN PS Booster Transverse Damper: 10 kHz - 200 MHz Radiation Tolerant Amplifier for Capacitive PU Signal Conditioning impedance, pick-up, linac, electronics 315
 
  • A. Meoli, A. Blas, R. Louwerse
    CERN, Geneva, Switzerland
  
  After connection to the LINAC4, the beam intensity in the PSBooster is expected to double and thus, an upgrade of the head electronics of the transverse feedback BPM is necessary. In order to cover the beam spectrum for an effective transverse damping, the pickup (PU) signal should have a large bandwidth on both the low and high frequency sides. Furthermore, in order to extend the natural low frequency cut-off from 6MHz (50' load) down to the required 10kHz, with no modification of the existing PUs, a high impedance signal treatment is required. The electronic parts should withstand the radiation dose received during at least a year of service. This constraint implies the installation of the amplifier at a remote location. A solution was found inspired by the technique of oscilloscopes' high impedance probes that mitigates the effect of transmission line mismatch using a lossy coaxial cable with an appropriate passive circuitry. A new large bandwidth, radiation tolerant amplifier has been designed. The system requirements, the analysis, the measurements with the present PUs, the design of the amplifier and the experimental results are described in this contribution.  
poster icon Poster TUPG04 [1.030 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG04  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG06 Development Status of a Stable BPM System for the SPring-8 Upgrade electronics, photon, quadrupole, alignment 322
 
  • H. Maesaka
    RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
  • H. Dewa, T. Fujita, M. Masaki, S. Takano
    JASRI, Hyogo, Japan
  
  A stable and precise BPM system is necessary for the low-emittance upgrade of SPring-8. Key requirements for the BPM system are: 1) long-term stability to maintain the photon beam direction of the beamline well within the intrinsic photon divergence, 2) single-pass resolution better than 100 μm rms for a 100 pC injected bunch for first turn steering in the beam commissioning, and 3) accuracy better than 100 μm rms with respect to aligned quadrupole and sextupole magnet centers to achieve the design performance of the upgraded ring. To realize the demanded stability, the BPM drift should be reduced to 1 μm level. Therefore, we have been pursuing designs to suppress the thermal deformation of a BPM head and its support and to minimize the drifts of BPM electronics and coaxial cables. The investigation results on causes of drifts of the present SPring-8 BPM system are reflected to the design of the new BPM system. A button-type BPM head has been developed*, which can generate sufficient signal to satisfy the required single-pass resolution. We have also been studying the strategies of the alignment, position survey and electric center calibration of the BPM head better than 100 μm.
* M. Masaki et al., in this conference. 		 
poster icon Poster TUPG06 [5.250 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG06  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG22 Timing Window and Optimization for Position Resolution and Energy Calibration of Scintillation Detector detector, timing, simulation, photon 372
 
  • J. Zhu, M.H. Fang, J. Wang, Z.Y. Wei
    NUAA, Nanjing, People's Republic of China
  
  The real event selection, timing resolution, position resolution and energy response of the EJ-200 plastic scintillation detector have been analyzed using timing window coincidence measurement. The detector was simulated based on Monte Carlo, including its geometry, energy deposition, photon collection and signal generation. The detection efficiency and the real events selection have been obtained while the background noise has been reduced by using two-end readout timing window coincidence. We developed an off-line analysis code, which is suitable for massive data from the digitizer. We set different coincidence timing windows, and did the off-line data processing respectively. We find the detection efficiency increases as the width of the timing window increases, and when the width of timing window is more than 10ns, the detection efficiency will slowly grow until it reaches saturation. Time, position and energy response have been measured by exposing to radioactive sources. The best timing window parameter as 16ns is obtained for on-line coincidence measurement, and the position resolution is up to 12cm. Energy response of the detector was linear within the experimental energy range*.
* L. Karsch, A. Bohm et al,"Design and Test of A Large-area Scintillation Detector for Fast Neutrons", Nuclear Instruments and Methods in Physics Research A, vol.460, pp.362-367, 2001. 		 
poster icon Poster TUPG22 [5.665 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG22  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG24 Online Total Ionisation Dosimeter (TID) Monitoring Using Semiconductor Based Radiation Sensors in the ISIS Proton Synchrotron synchrotron, proton, injection, experiment 379
 
  • D.M. Harryman, A. Pertica
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
  
  During routine operation, the radiation levels in the ISIS proton synchrotron become high enough to permanently affect systems and electronics. This can potentially cause critical components to fail unexpectedly or denature over time, causing disruption for users of the ISIS facility or a loss of accuracy on a number of systems. To study the long term effects of ionising radiation on ISIS systems and electronics, the total dose received by such components must be recorded. A semiconductor based online Total Ionisation Dosimeter (TID) was developed to do this, using pin diodes and Radiation sensing Field Effect Transistors (RadFETs) to measure the total ionisation dose. Measurements are made by feeding the TIDs with a constant current, with the threshold voltage on each device increasing in relation to the amount of radiation that it has received. This paper will look at preliminary offline results using off the shelf Field Effect Transistors (FETs) and diodes, before discussing the development of the RadFET online monitor and the results it has gathered thus far. Finally the paper will look at future applications and studies that this type of monitor will enable.  
poster icon Poster TUPG24 [1.235 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG24  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG40 The Cherenkov Detector for Proton Flux Measurement (CpFM) in the UA9 Experiment detector, experiment, proton, vacuum 430
 
  • S. Montesano, W. Scandale
    CERN, Geneva, Switzerland
  • F.M. Addesa, G. Cavoto, F. Iacoangeli
    INFN-Roma, Roma, Italy
  • L. Burmistrov, S. Dubos, V. Puill, W. Scandale, A. Stocchi
    LAL, Orsay, France
  
  The UA9 experiment at the CERN SPS investigates the possibility to use bent crystals to steer particles in high energy accelerators. In this framework the CpFM have been developed to measure the beam particle flux in different experimental situations. Thin movable fused-silica bars installed in the SPS primary vacuum and intercepting the incoming particles are used to radiate Cherenkov light. The light signal is collected outside the beam pipe through a quartz optical window by radiation hard PMTs. The PMT signal is readout by the WaveCatcher acquisition board, which provides count rate as well as waveform information over a configurable time window. A bundle of optical fibers can be used to transport the light signal far from the beam pipe, allowing to reduce the radiation dose to the PMT. A first version of the CpFM has been successfully commissioned during the data taking runs of the UA9 Experiment in 2015, while a second version has been installed in the TT20 extraction line of the SPS in 2016. In this contribution the design choices will be presented and the final version of the detector will be described in detail.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG40  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG54 Novel Approach to the Elimination of Background Radiation in a Single-Shot Longitudinal Beam Profile Monitor detector, polarization, background, electron 471
 
  • H. Harrison, G. Doucas, I.V. Konoplev, A.J. Lancaster, H. Zhang
    JAI, Oxford, United Kingdom
  • A. Aryshev, M. Shevelev, N. Terunuma, J. Urakawa
    KEK, Ibaraki, Japan
  
  It is proposed to use the polarization of coherent Smith-Purcell radiation (cSPr) to distinguish between the cSPr signal and background radiation in a single-shot longitudinal bunch profile monitor. A preliminary measurement of the polarization has been carried out using a 1mm periodic metallic grating installed at the 8MeV electron accelerator LUCX, KEK (Japan). The measured degree of polarization at '=90° (300GHz) is 72.6 ±%. To make a thorough test of the theoretical model, measurements of the degree of polarization must be taken at more emission angles - equivalent to more frequencies.
This work was supported (in parts) by the: STFC UK, the Leverhulme Trust, JAI University of Oxford and the Photon and Quantum Basic Research Coordinated Development (Japan).
 		 
poster icon Poster TUPG54 [0.432 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG54  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG58 Measurement of Femtosecond Electron Beam Based on Frequency and Time Domain Schemes electron, laser, linac, gun 483
 
  • K. Kan, M. Gohdo, T. Kondoh, I. Nozawa, J. Yang, Y. Yoshida
    ISIR, Osaka, Japan
  
  Ultrashort electron beams are essential for light sources and time-resolved measurements. Electron beams can emit terahertz (THz) pulses using coherent transition radiation (CTR). Michelson interferometer* is one of candidates for analyzing the pulse width of an electron beam based on frequency-domain analysis. Recently, electron beam measurement using a photoconductive antenna (PCA)** based on time-domain analysis has been investigated. The PCA with enhanced radial polarization characteristics enabled time-domain analysis for electron beam because of radially polarized THz pulse of CTR. In this presentation, measurement of femtosecond electron beam with 35 MeV energy and < 1 nC from a photocathode based linac will be reported. Frequency- and time- domain analysis of THz pulse of CTR by combining the interferometer and PCA will be carried out.
* I. Nozawa, K. Kan et al., Phys. Rev. ST Accel. Beams 17, 072803 (2014).
** K. Kan et al., Appl. Phys. Lett. 102, 221118 (2013).
 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG58  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG62 X-Ray Smith-Purcell Radiation for Non-Invasive Submicron Diagnostics of Electron Beams Having TeV Energy target, diagnostics, electron, plasma 494
 
  • A.A. Tishchenko, D.Yu. Sergeeva
    MEPhI, Moscow, Russia
  
  We present the general theory of X-ray Smith-Purcell radiation from ultrarelativistic beams proceeding from our earlier results. The theory covers also the case of oblique incidence of the beam to the target, which leads to the conical effect in spatial distribution of Smith-Purcell radiation and allows one to count the divergence of the beam; also, the analytical description of the incoherent form-factor of the beam is given.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG62  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG64 Bunch Length Measurement Based on Interferometric Technique by Observing Coherent Transition Radiation electron, linac, gun, detector 498
 
  • I. Nozawa, M. Gohdo, K. Kan, T. Kondoh, J. Yang, Y. Yoshida
    ISIR, Osaka, Japan
  
  Generation and diagnosis of ultrashort electron bunches are one of the main topics of accelerator physics and applications in related scientific fields. In this study, ultrashort electron bunches with bunch lengths of femtoseconds and bunch charges of picocoulombs were generated from a laser photocathode RF gun linac and an achromatic arc-type bunch compressor. Observing coherent transition radiation (CTR) emitted from the electron bunches using a Michelson interferometer, the interferograms of CTR were measured experimentally. The bunch lengths were diagnosed by performing a model-based analysis of the interferograms of CTR.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG64  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG65 OTR Measurements with Sub-MeV Electrons electron, target, TRIUMF, linac 501
 
  • V.A. Verzilov, P.E. Dirksen
    TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
  
  It is a quite common belief that measurements of Optical Transition Radiation (OTR) produced by sub-MeV electron beams are impossible or at least require special highly sensitive instrumentation. The TRIUMF electron linac, presently undergoing commissioning, is capable of delivering up to 10mA of CW electron beams. Simulations showed that such a powerful beam generates substantial amount of light even at electron energies available at the output of the thermionic gun. The experiment was then setup to test the predictions. This paper reports OTR measurements for the range of electron energies 100-300 keV performed with an ordinary CCD camera.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG65  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG68 Study of the Radiation Damage on a Scintillating Fibers Based Beam Profile Monitor detector, factory, proton, extraction 512
 
  • E. Rojatti, G.M.A. Calvi, L. Lanzavecchia, A. Parravicini, C. Viviani
    CNAO Foundation, Milan, Italy
  
  The Scintillating Fibers Harp (SFH) monitors are the beam profile detectors used in the High Energy Beam Transfer (HEBT) lines of the CNAO (Centro Nazionale Adroterapia Oncologica, Italy) machine. The use of scintillating fibers coupled with a high-resolution CCD camera makes the detector of simple architecture and with high performances (less than 0.5mm resolution and 50Hz frame rate); on the other hand, fibers radiation damage shall be faced after some years of operation. The damage appears in multiple ways, as efficiency loss in light production, delayed light emission, attenuation length reduction. The work presents measurements and analysis performed to understand the phenomenon, in such a way to deal with it as best as possible. The connection between dose rate, integral dose and damage level is investigated as well as the possible recovery after a period of no irradiation. The influence of the damage effects on profiles reconstruction and beam parameters calculation is studied. Data elaboration is modified in such a way to compensate radiation damage effects and protract the SFH lifetime, before the major intervention of fibers replacement. Methods and results are discussed.  
poster icon Poster TUPG68 [1.244 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG68  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG70 Test of the Imaging Properties of Inorganic Scintillation Screens Using Fast and Slow Extracted Ion Beams ion, extraction, target, proton 516
 
  • A. Lieberwirth, P. Forck, O.K. Kester, S. Lederer, T. Sieber, B. Walasek-Höhne
    GSI, Darmstadt, Germany
  • W. Ensinger, S. Lederer, A. Lieberwirth
    TU Darmstadt, Darmstadt, Germany
  • P. Forck, O.K. Kester
    IAP, Frankfurt am Main, Germany
  
  Funding: Work supported by BMBF, contract number 05P12RDRBJ
Inorganic scintillation screens are a common transverse profile diagnostics tool for beams extracted from the heavy ion synchrotron SIS18 at GSI. Detailed investigations concerning light output, profile reproduction and spectral emission were performed for phosphor screens P43 and P46, single crystal YAG:Ce, alumina ceramics and Chromium-doped alumina (Chromox). The screens were irradiated with several ion species from proton to Uranium. The particle energy was 300 MeV/u at intensities in the range from some 106 to 1010 particles per pulse, using either fast extraction (1μsecond duration) or slow extraction (some 100 ms duration). The light output coincides for both extraction types, i.e. no significant saturation was observed. For all materials the optical emission spectrum is independent on the ion species or beam intensities. Radiation hardness tests were performed with up to 1012 accumulated ions: The phosphor P46 as well as YAG:Ce shows no significant decrease of light output, while for P43 and Chromox a decrease by 5 to 15 % was measured. These results will trigger the choice of the standard screens installed at the FAIR facility. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG70  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG73 Preparatory Work for a Fluorescence Based Profile Monitor for an Electron Lens electron, proton, photon, ion 528
 
  • S. Udrea, P. Forck
    GSI, Darmstadt, Germany
  • E. Barrios Diaz, O.R. Jones, P. Magagnin, G. Schneider, R. Veness
    CERN, Geneva, Switzerland
  • P. Forck, S. Udrea
    IAP, Frankfurt am Main, Germany
  • V. Tzoganis, C.P. Welsch, H.D. Zhang
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  
  Electron lenses (e-lens) have been proposed and used to mitigate several issues related to beam dynamics in high current synchrotrons. A hollow electron lens system is presently under development as part of the collimation upgrade for the high luminosity up-grade of LHC. Moreover, at GSI an electron lens system also is proposed for space charge compensation in the SIS-18 synchrotron to decrease the tune spread and allow for the high intensities at the future FAIR facility. For effective operation, a very precise alignment is necessary between the ion beam and the low energy electron beam. For the e-lens at CERN a beam diagnostics setup based on an intersecting gas sheet and the observation of beam induced fluorescence (BIF) is under development within a collaboration between CERN, Cockcroft Institute and GSI. In this paper we give an account of recent preparatory experiments performed at the Cockcroft Institute's gas curtain experimental setup with the aim to find the optimum way of distinguishing between the signals due to the low energy electron beam and the relativistic proton beam.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG73  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG74 Spot Size Measurements in the ELI-NP Compton Gamma Source target, linac, diagnostics, optics 532
 
  • F. Cioeta, E. Chiadroni, G. Di Pirro, G. Franzini, V. Shpakov, A. Stella, A. Variola
    INFN/LNF, Frascati (Roma), Italy
  • A. Cianchi
    INFN-Roma II, Roma, Italy
  • M. Marongiu
    INFN-Roma, Roma, Italy
  • A. Mostacci, L. Palumbo
    University of Rome La Sapienza, Rome, Italy
  
  A high brightness electron Linac is being built in the Compton Gamma Source at the ELI Nuclear Physics facility in Romania. To achieve the design luminosity, a train of 32, 16 ns spaced, bunches with a nominal charge of 250 pC will collide with the laser beam in the interaction point. Electron beam spot size is measured with an OTR (optical transition radiation) profile monitors. In order to measure the beam properties, the optical radiation detecting system must have the necessary accuracy and resolution. This paper deals with the studies of different optic configurations to achieve the magnification, resolution and accuracy desired considering design and technological constraints; we will compare several configurations of the optical detection line to justify the one chosen for the implementation in the Linac.  
poster icon Poster TUPG74 [44.049 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG74  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPG75 Thermal Simulations for Optical Transition Radiation Screen for ELI-NP Compton Gamma Source target, electron, simulation, linac 536
 
  • F. Cioeta, D. Alesini, A. Falone, V.L. Lollo, L. Pellegrino, A. Variola
    INFN/LNF, Frascati (Roma), Italy
  • M. Ciambrella, A. Mostacci, L. Palumbo
    University of Rome La Sapienza, Rome, Italy
  • M. Marongiu, V. Pettinacci
    INFN-Roma, Roma, Italy
  
  The Gamma Beam Source (ELI-GBS) is a high brightness electron LINAC that is being built at the ELI Nuclear Physics (ELI-NP) facility in Romania. The ELI-GBS aims to produce high quality gamma beam through Compton Backscattering. A train of 32 bunches at 100Hz with a nominal charge of 250pC is accelerated up to 740 MeV. Two interaction points with an IR Laser beam produces the gamma beam at two different energies. In order to measure the electron beam spot size and the beam properties, the LINAC is equipped with several optical transition radiation (OTR) profile monitors. Those OTR screens must sustain the thermal and mechanical stress due to the energy deposited by the bunches. We present a numerical (ANSYS) study of the thermo-mechanical issues due to beam energy deposition in the screens; our analysis will cover both the steady state and transient regime.  
poster icon Poster TUPG75 [41.161 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG75  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEBL02 Beam Size Measurements Using Interferometry at LHC injection, extraction, synchrotron, undulator 583
 
  • G. Trad, E. Bravin, A. Goldblatt, S. Mazzoni, F. Roncarolo
    CERN, Geneva, Switzerland
  • T.M. Mitsuhashi
    KEK, Ibaraki, Japan
  
  During the long LHC shutdown 2013-2014, both the LHC and its injector chain underwent significant upgrades. The most important changes concerned increasing the maximum LHC beam energy from 4TeV to 6.5TeV and reducing the transverse emittance of the beam from the LHC injectors. These upgrades pose challenges to the measurement of the transverse beam size via Synchrotron Radiation (SR) imaging, as the radiation parameters approach the diffraction limit. Optical SR interferometry, widely used in synchrotron light facilities, was considered as an alternative method to measure the 150 'm rms beam size at top energy as it allows measurements below the diffraction limit. A system based on this technique was therefore implemented in the LHC, for the first time on a proton machine. This paper describes the design of the LHC interferometer and its two SR sources (a superconducting undulator at low energy and a bending dipole at high energy), along with the expected performance in terms of beam size measurement as compared to the imaging system. The world's first proton beam interferogram measured at the LHC will be shown and plans to make this an operational monitor will be presented.  
slides icon Slides WEBL02 [42.662 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEBL02  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEBL03 Beam Shape Reconstruction Using Synchrotron Radiation Interferometry synchrotron, synchrotron-radiation, coupling, simulation 589
 
  • L. Torino, U. Iriso
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  Synchrotron Radiation Interferometry (SRI) through a double-aperture system is a well known technique to measure the transverse beam size using visible light. In many machines the beam is tilted in the transverse plane, but the SRI technique only allows to directly measure the size of the projection of the beam shape along the axis connecting the two apertures. A method to fully reconstruct the beam in the transverse plane using SRI has been developed and successfully tested at the ALBA synchrotron light source. This report shows the full beam reconstruction technique and presents the results at ALBA. Moreover, we also discuss how this technique could improve the measurement of very small beam sizes, improving the resolution of standard SRI.  
slides icon Slides WEBL03 [20.443 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEBL03  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WECL02 Accurate Measurement of the MLS Electron Storage Ring Parameters electron, storage-ring, synchrotron, operation 600
 
  • R. Klein, G. Brandt, T. Reichel, R. Thornagel
    PTB, Berlin, Germany
  • J. Feikes, M. Ries, I. Seiler
    HZB, Berlin, Germany
  
  The use of the Metrology Light Source (MLS), the electron storage ring of the Physikalisch-Technische Bundesanstalt (PTB, the German national metrology institute) as a primary radiation source standard requires the accurate measurement of all storage ring parameters needed for the calculation of the spectral radiant intensity of the synchrotron radiation. Therefore, instrumentation has been installed in the MLS for the measurement of, e.g., the electron beam energy, the electron beam current or the electron beam size that outperforms that usually installed in electron storage rings used as a common synchrotron radiation source. We report on the status and improvements in the storage ring parameter measurement.  
slides icon Slides WECL02 [6.998 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WECL02  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG22 Relation between Signals of the Beam Loss Monitors and Residual Radiation in the J-PARC RCS beam-losses, operation, proton, vacuum 673
 
  • M. Yoshimoto, H. Harada, M. Kinsho, K. Yamamoto
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
  
  The most important issue in realizing such a MW-class high-power routine beam operation is to keep machine activations within a permissible level, that is, to preserve a better hands-on-maintenance environment. Thus, a large fraction of our effort has been concentrated on reducing and managing beam losses. To validate the beam loss optimizations, residual radiation measurement along the ring provide us with further information. By relating signals of the beam loss monitors with the measured distribution of the residual radiation, achievements of the high power beam operation will be described. In this presentation, we will report on the measurement results of residual radiation distribution along the ring together with the relation with the beam loss signals.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG22  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG23 Evaluating Beam-Loss Detectors for LCLS-2 detector, ion, electron, linac 678
 
  • A.S. Fisher, R.C. Field, L.Y. Nicolas
    SLAC, Menlo Park, California, USA
  
  The LCLS x-ray FEL occupies the third km of the 3-km SLAC linac, which accelerates electrons in copper cavities pulsed at 120 Hz. For LCLS-2, the first km of linac will be replaced with superconducting cavities driven by continuous RF at 1300 MHz. The normal-conducting photocathode gun will also use continuous RF, at 186 MHz. The laser pulse rate will be variable up to 1 MHz. With a maximum beam power of 250 kW initially, and eventually 1 MW, the control of beam loss is critical for machine and personnel safety, especially since losses can continue indefinitely in linacs and dark current emitted in the gun or cavities can be lost at any time. SLAC protection systems now depend on ionization chambers, both local devices at expected loss sites and long gas-dielectric coaxial cables for distributed coverage. However, their ion collection time is over 1 ms, far slower than the beam repetition rate. We present simulations showing that with persistent losses, the space charge of accumulated ions can null the electric field inside the detector, blinding it to an increase in loss. We also report on tests comparing these detectors to faster alternatives.  
poster icon Poster WEPG23 [6.589 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG23  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG34 Heavy Ion Beam Flux and In-situ Energy Measurements at High LET ion, detector, heavy-ion, cyclotron 700
 
  • S. Mitrofanov, I.V. Kalagin, V.A. Skuratov, Yu.G. Teterev
    JINR, Dubna, Moscow Region, Russia
  • V.S. Anashin
    United Rocket and Space Corporation, Institute of Space Device Engineering, Moscow, Russia
  
  The Russian Space Agency with the TL ISDE involvement has been utilizing ion beams from oxygen up to bismuth delivered from cyclotrons of the FLNR JINR accelerator complex for the SEE testing during last seven years. The detailed overview of the diagnostic set-up features used for low intensity ion beam parameters evaluation and control during the corresponding experiments is presented. Special attention is paid to measurements of ion flux and energy at high LET levels and evaluation of ion beam uniformity over large (200x200 mm) irradiating areas. The online non-invasive (in-situ) time of flight technique designed for low intensity ion beam energy measurements based on scintillation detectors is considered in details. The system has been successfully commissioned and is used routinely in the SEE testing experiments.  
poster icon Poster WEPG34 [7.361 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG34  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG37 Nondestructive High-Accuracy Charge Measurement of the Pulses of a 27 MeV Electron Beam from a Linear Accelerator linac, electron, vacuum, monitoring 708
 
  • A. Schüller, J. Illemann, R.-P. Kapsch, C. Makowski, F. Renner
    PTB, Braunschweig, Germany
  
  This work presents a description of measuring devices and procedures in order to enable the nondestructive (non-intercepting) absolute measurement of the charge of individual beam pulses (macro-pulses) from an electron linear accelerator with high accuracy, i.e. with a measurement uncertainty <0.1%. In particular, we demonstrate the readout and calibration of a Bergoz integrating current transformer which is frequently applied at many different types of accelerators as a beam intensity monitor. The current transformer signal is calibrated against a custom-made compact Faraday cup with a high degree of collection efficiency for electron beams in the energy range of 6 MeV to 50 MeV (99.2 % at 27 MeV), which is well known from measurements and Monte Carlo calculations.  
poster icon Poster WEPG37 [1.513 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG37  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG53 Unambiguous Electromagnetic Pulse Retrieval Through Frequency Mixing Interference in Frequency Resolved Optical Gating electron, laser, diagnostics, framework 767
 
  • E.W. Snedden, S.P. Jamison, D.A. Walsh
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • S.P. Jamison
    The University of Manchester, The Photon Science Institute, Manchester, United Kingdom
  
  We demonstrate a method for full and unambiguous temporal characterization of few-cycle electromagnetic pulses, including retrieval of the carrier envelope phase (CEP), in which the interference between non-linear frequency mixing components is spectrally resolved using Frequency Resolved Optical Gating (FROG). We term this process Real-Domain FROG (ReD-FROG) and demonstrate its capabilities through the complete measurement of the temporal profile of a single-cycle THz pulse. When applied at THz frequencies ReD-FROG overcomes the bandwidth limitations relating probe and test pulses in Electro-Optic (EO) sampling. The approach can however be extended generally to any frequency range and we provide a conceptual demonstration of the CEP retrieval of few-cycle optical field.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG53  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG56 Single-Shot THz Spectroscopy for the Characterization of Single-Bunch Bursting CSR detector, impedance, electron, operation 778
 
  • J. Raasch, M. Arndt, J. Hänisch, K.S. Ilin, K. Kuzmin, A.-S. Müller, A. Schmid, M. Siegel, J.L. Steinmann, S. Wuensch
    KIT, Karlsruhe, Germany
  • G. Cinque, M. Frogley
    DLS, Oxfordshire, United Kingdom
  • B. Holzapfel
    Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
  
  Funding: The work was supported by the BMBF (05K13VK4), the Helmholtz International Research School for Teratronics & the Karlsruhe School of Elementary Particle and Astroparticle Physics.
An integrated array of narrow-band high-Tc YBa2Cu3O7-x (YBCO) detectors embedded in broad-band readout was developed for the future use at synchrotron light sources as a single-shot terahertz (THz) spectrometer. The detection system consists of up to four thin-film YBCO nanobridges fed by planar double-slit antennas covering the frequency range from 140 GHz up to 1 THz. We present first results obtained at the ANKA storage ring and at Diamond Light Source during operation of two and four frequency-selective YBCO detectors, respectively. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG56  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG57 Single-Shot THz Spectrometer for Bunch Length Measurements detector, electron, diagnostics, alignment 782
 
  • S.V. Kutsaev, A.Y. Murokh, M. Ruelas, H.L. To
    RadiaBeam Systems, Santa Monica, California, USA
  • V. Goncharik
    Logicware Inc, New York, USA
  
  Funding: This work was supported by the U.S. Department of Energy, Office of High Energy Physics, under contract DE-SC0013684
We present a new diagnostics instrument designed to measure bunch length in RF particle accelerators. Typically, scanning-type Michelson or Martin-Puplett interferometers are used to measure the coherent radiation from a short bunch. However, they require averaging over several shots over several minutes, thus being able to report only the average bunch length. We propose to measure the emitted coherent spectrum of a short bunch emission that contains the same spectral information as the bunch shape by means of single-shot spectrometry. In this paper we present design considerations, and first experimental results obtained at FACET for the instrument that allows shot-to-shot measurement of the emitted spectrum. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG57  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG61 Theory of X-Ray Transition Radiation from Graphene for Transition Radiation Detectors electron, detector, plasma, target 788
 
  • A.A. Tishchenko, A. Romaniouk, D.Yu. Sergeeva, M.N. Strikhanov
    MEPhI, Moscow, Russia
  
  We present the theory of transition radiation for monolayers in X-ray domain from the first principles and consider the pros and cons of using graphene-monolayer in transition radiation detectors.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG61  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG62 Incoherent and Coherent Polarization Radiation as Instrument of the Transversal Beam Size Diagnostics polarization, factory, target, diagnostics 792
 
  • D.Yu. Sergeeva, M.N. Strikhanov, A.A. Tishchenko
    MEPhI, Moscow, Russia
  
  Polarization radiation, which includes diffraction radiation (DR), transition radiation (TR), Smith-Purcell radiation, and others, can be a good instrument for beam diagnostics. All information about the beam size is contained in the so-called form-factor of the beam. The form-factor represents the sum of two parts corresponding to the coherent and incoherent radiation*. Contrary to the general opinion the incoherent part does not always equal unity*, **. In this report we give theoretical description of the incoherent and coherent parts of the form-factor both for Gaussian and uniform distribution of the ultrarelativistic particles in the bunch*, ***. The theory constructed describes also the case of beam skimming the target, which leads to mixing of DR and TR***. We show that the incoherent part depends on the transversal size of the beam, and dependence differs for different distributions. The role of the incoherent part of the form-factor of the bunch for different parameters is discussed.
* D.Yu. Sergeeva, A.A. Tishchenko et al., NIM B (2013)
** J.H. Brownell et al., PRE (1998); G. Doucas et al., PR STAB (2002)
*** A.A. Tishchenko, D.Yu. Sergeeva et al., Vacuum (2016) 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG62  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG63 Performance Evaluation of Molybdenum Blades in an X-ray Pinhole Camera emittance, synchrotron, synchrotron-radiation, electron 795
 
  • L.M. Bobb, A.F.D. Morgan, G. Rehm
    DLS, Oxfordshire, United Kingdom
  
  At Diamond Light Source transverse profile measurements of the 3 GeV electron beam are provided by x-ray pinhole cameras. From these beam size measurements and given knowledge of the lattice parameters the emittance, coupling and energy spread are calculated. Traditionally, tungsten blades are used to form the pinhole aperture due to the opacity of tungsten to x-rays in the keV spectral range. The physical properties of tungsten also make it difficult to work. To achieve the 25 micron x 25 micron aperture size required for high resolution measurements it is necessary to mount these tungsten blades in an assembly whereby the pinhole aperture size is defined by precisely machined shims. Here we propose to replace the tungsten blade and shim arrangement with machined molybdenum blades and evaluate the performance of the resulting imaging system.  
poster icon Poster WEPG63 [0.825 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG63  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG66 Beam Induced Fluorescence Monitor R&D for the J-PARC Neutrino Beamline proton, injection, space-charge, vacuum 799
 
  • M.L. Friend
    KEK, Ibaraki, Japan
  • C. Bronner, M. Hartz
    Kavli IPMU, Kashiwa, Japan
  
  Proton beam monitoring is essential for the J-PARC neutrino beamline, where neutrinos are produced by the collision of 30 GeV protons with a long carbon target. Along with continued upgrades to the J-PARC beam power, from the current 420 kW to 1.3+ MW, there is also a requirement for monitor upgrades. A Beam Induced Fluorescence monitor is under development, which would continuously and non-destructively measure the proton beam profile spill-by-spill by measuring fluorescence light from proton interactions with gas injected into the beamline. Monitor design is constrained by the J-PARC neutrino beamline configuration, where a major challenge will be getting sufficient signal to precisely reconstruct the proton beam profile. R&D for a pulsed gas injection system is under way, where injected gas uniformity and vacuum pump lifetime are main concerns. Design of a light detection system is also under way, where light transport away from the high radiation environment near the proton beamline, as well as fast detection down to very low light levels, are essential.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG66  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG75 The Beam Profile Monitoring System for the CERN IRRAD Proton Facility proton, detector, data-acquisition, operation 825
 
  • F. Ravotti, B. Gkotse, M. Glaser, E. Matli, G. Pezzullo
    CERN, Geneva, Switzerland
  • K.K. Gan, H. Kagan, S. Smith, J.D. Warner
    Ohio State University, Columbus, Ohio, USA
  
  Funding: Project funded by AIDA project and the EU H2020 Research and Innovation programme, GA n. 654168.
In High Energy Physics (HEP) experiments, devices are required to withstand high radiation levels. As a result, detectors and electronics sitting in the inner detector layers must be irradiated to determine their radiation tolerance. To perform these irradiations, CERN built during LS1 a new irradiation facility in the East Area at the Proton Synchrotron (PS) accelerator. At this facility, named IRRAD, a high-intensity 24 GeV/c proton beam is used. During beam steering and irradiation, the intensity and the transverse profile of the proton beam are monitored online. The IRRAD Beam Profile Monitor (BPM) uses a set of four 39-channel pixel detectors constructed using thin foil copper pads positioned on a flex circuit. When protons pass through the copper pads, they induce a measurable current. To measure this current a new data acquisition system was designed as well as a new database and on-line display system. In this work, we present the design and the architecture of the IRRAD BPM system, some results on its performance with the proton beam, as well as its planned upgrades, including its utilization for monitoring irradiations with an intense 300MeV/c positive pion beam at PSI. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG75  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG76 Status of the Two-Dimensional Synchrotron Radiation Interferometer at PETRA III emittance, diagnostics, synchrotron, controls 829
 
  • A.I. Novokshonov, A. Potylitsyn
    TPU, Tomsk, Russia
  • G. Kube, M. Pelzer, G. Priebe
    DESY, Hamburg, Germany
  
  Synchrotron radiation based emittance diagnostics at modern 3rd generation light sources is mainly based on beam profile imaging in the X-ray region in order to overcome the resolution limit imposed by diffraction. A possibility to circumvent this limitation is to probe the spatial coherence with a double-slit interferometer in the optical spectral region [*]. The light source PETRA III at DESY is using this type of interferometer since several years in order to resolve vertical emittances of about 10 pm.rad. The device is set up behind a 30m long optical beamline, connecting the accelerator tunnel and the optical hutch. In order to increase the measurement stability, a much shorter optical beamline with reduced number of optical elements was recently commissioned. At the end of the beamline, a two-dimensional interferometer was installed which allows to deduce transverse emittances in both planes simultaneously. This contribution summarizes the status of beamline and interferometer commissioning together with model calculations in order to investigate systematically the measurement accuracy.
*T. Mitsuhashi, "Twelve Years of SR Monitor Development", 2004 Beam Instrumentation Workshop, 2014, pp. 5-11. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG76  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPG80 Optical Effects in High Resolution and High Dynamic Range Beam Imaging Systems electron, optics, background, diagnostics 844
 
  • J. Wolfenden, R.B. Fiorito, C.P. Welsch
    The University of Liverpool, Liverpool, United Kingdom
  • M. Bergamaschi, R. Kieffer, T. Lefèvre, S. Mazzoni
    CERN, Geneva, Switzerland
  • P. Karataev, K.O. Kruchinin
    JAI, Egham, Surrey, United Kingdom
  
  Optical systems are used to transfer light in beam diagnostics for a variety of imaging applications. The effect of the point spread function (PSF) of these optical systems on the resulting measurements is often approximated or misunderstood. It is imperative that the optical PSF is independently characterised, as this can severely impede the attainable resolution of a diagnostic measurement. A high quality laser and specially chosen optics have been used to generate an intense optical point source in order to accomplish such a characterisation. The point source was used to measure the PSFs of various electron-beam imaging systems. These systems incorporate a digital micro-mirror array, which was used to produce very high (>105) dynamic range images. The PSF was measured at each intermediary image plane of the optical system; enabling the origin of any perturbations to the PSF to be isolated and potentially mitigated. One of the characterised systems has been used for optical transition radiation (OTR) measurements of an electron beam at KEK-ATF2 (Tsukuba, Japan).  
poster icon Poster WEPG80 [1.851 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG80  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THBL01 SiPMs for Beam Instrumentation. Ideas From High Energy Physics detector, photon, electronics, instrumentation 860
 
  • D. Gascon, D. Ciaglia, G. Fernàndez, R. Graciani, S. Gómez, J. Mauricio, N. Rakotnavalona, A. Sanuy, D. Sánchez
    UB, Barcelona, Spain
  
  Silicon Photomultipliers (SiPM) enable fast low-level light detection and even photon counting with a semiconductor device. Thanks to a now matured technology, SiPMs can be used in a variety of applications like: Medical imaging, fluorescence detection, range-finding and high-energy physics. We present different possible application of SiPMs for beam instrumentation. First, we discuss timing properties of SiPMs, and how to optimize them for high rate environments enabling photon counting. This requires to understand the dependence of SiPM pulse shape on its configuration (total area, cell size, capacitances, etc) and analyse dedicated front end electronics techniques. Finally, based on the experience of several projects aiming to develop trackers for high energy physics, we present some ideas to develop beam monitoring instrumentation based scintillating fibers coupled to SiPMs, where radiation hardness of scintillating fibers can be an important concern.  
slides icon Slides THBL01 [5.473 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-THBL01  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)