IPAC2017 - List of Keywords (electronics)

Paper	Title	Other Keywords	Page
MOPAB043	Very First Experience with the Standard Diagnostics at the European XFEL	diagnostics, operation, electron, cavity	180
	D. Lipka DESY, Hamburg, Germany
	The whole European XFEL becomes in operation this year. Dedicated standard diagnostics systems are installed and almost all types are tested at the injector before. Now the standard diagnostics are used to commission the facility. In this contribution the very first results and the operation experiences of the standard beam diagnostics of the entire European XFEL are reported.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB043
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB076	2D Beam Profile Monitors at CPHS of Tsinghua University	proton, target, ion, radiation	298
	W. Wang, X. Guan, W.-H. Huang, Y. Lei, X.W. Wang, Q.Z. Xing, S.X. Zheng TUB, Beijing, People's Republic of China L. Du CEA/IRFU, Gif-sur-Yvette, France M.T. Qiu, Z.M. Wang State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Shannxi, People's Republic of China
	Beam profile is a key parameter for high current proton linac. Compact Pulsed Hadron Source(CPHS) has two type of detectors to monitor beam 2D beam profile: scintillator screen and rotatable multi-wire scanner. A retractable chromium-doped alumina (Chromox) screen is used as scintillator, emitted lights when impacted by proton are captured by a 12 bit CCD camera. Nineteen carbon fibre wires with a diameter of 30 'm, 3 mm separated from each other, are used to measure beam 1D distribution. Projection can be measured at different direction by rotating the multi-wire scanner about beam direction. 2D beam distribution is reconstructed from multiple projections with the help of CT. Different CT algorithms, Algebra Reconstruct Technique (ART) and Maximum Entropy algorithm (MENT), are applied to achieve accurate or quick reconstruction. The preliminary experimental results show the two profile monitors working consistently with each other.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB076
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB083	The New Beam Current Transformer for IR-FEL Facility at NSRL *	FEL, diagnostics, electron, induction	312
	J.H. Wei, H. Li, X.Y. Liu, P. Lu, B.G. Sun, J.G. Wang, Q. Wang, F.F. Wu, Y.L. Yang, T.Y. Zhou USTC/NSRL, Hefei, Anhui, People's Republic of China
	Funding: Supported by The National Science Foundation of China (Grant No. 11575181) The beam current transformer (CT) is an important part of the beam diagnostics system as a kind of non-destructive intensity measurement. The beam CT has the strong dependence of the sensitivity and time constant on the time structure of the beam. To measure the macro-pulse beam intensity with 5-10 's length and 238 MHzμpulse repetition rate in the IR-FEL, it is necessary to find a suitable material as the CT core which can meet the measure requirement of the beam current. In this paper, three different magnetic materials were tested to find out that the laminated amorphous core owned the best performance, meanwhile, the mechanical structure was designed. The finished product passed the acceptance test.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB083
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB092	Design and Performance of Digital BPM Processor for DCLS and SXFEL	FPGA, pick-up, cavity, controls	338
	L.W. Lai, F.Z. Chen, Y.B. Leng, Y.B. Yan, N. Zhang SSRF, Shanghai, People's Republic of China J. Chen SINAP, Shanghai, People's Republic of China
	Funding: Work supported by National Natural Science Foundation (No. 11305253, 11575282) A digital BPM processor has been developed in SINAP, which can be used on the signal processing of both stripline BPM and cavity BPM. The processor is a standalone system and providing 4 channels 120MS/s, 16 bits ADC and powerful Virtex-5 FPGA. The processor has been mas applied on Dalian Coherent Light Source and Shanghai X-ray FE. The processor specification and performance evaluations including lab and beam tests will be introduced.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB092
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB100	The Development of Button Type BPM Electronics for RAON	pick-up, ion, operation, FPGA	362
	S.W. Jang, E.-S. Kim, Y. Lee Korea University Sejong Campus, Sejong, Republic of Korea Y.S. Chung, G.D. Kim, H.J. Woo IBS, Daejeon, Republic of Korea J.W. Kwon Korea University, Seoul, Republic of Korea
	RAON is a heavy ion accelerator for the Rare Isotope Science Project in Korea. The main goals of RAON is to accelerate various stable ions from ECR ion source and rare isotopes ions from ISOL beam line. For the stable beam operation, the beam diagnostics equipment is very important. Recently, we developed a digital board electronics for the button type beam position monitor (BPM) to measure the position of ion beams. In this presentation, design of electronics, beam signal simulation results, and RF measurement test results with a developed button BPM will be described.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB100
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB119	Beam Instrumentation Developments for the Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN	proton, electron, plasma, laser	404
	S. Mazzoni, M. Barros Marin, B. Biskup, A. Boccardi, T.B. Bogey, S. Burger, F.S. Domingues Sousa, E. Effinger, J. Emery, A. Goldblatt, I. Gorgisyan, E. Gschwendtner, A. Guerrero, L.K. Jensen, T. Lefèvre, D. Medina, B. Moser, G. Schneider, L. Søby, M. Turner, M. Vicente Romero, M. Wendt CERN, Geneva, Switzerland B. Biskup Czech Technical University, Prague 6, Czech Republic M. Turner TUG/ITP, Graz, Austria V.A. Verzilov TRIUMF, Vancouver, Canada
	The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) at CERN aims to develop a proof-of-principle electron accelerator based on proton driven plasma wake-field acceleration. The core of AWAKE is a 10 metre long plasma cell filled with Rubidium vapour in which single, 400 GeV, proton bunches extracted from the CERN Super Proton Synchrotron (SPS) generate a strong plasma wakefield. The plasma is seeded using a femtosecond pulsed Ti:Sapphire laser. The aim of the experiment is to inject low energy electrons onto the plasma wake and accelerate them over this short distance to an energy of several GeV. To achieve its commissioning goals, AWAKE requires the precise measurement of the position and transverse profile of the laser, proton and electron beams as well as their temporal synchronisation. This contribution will present the beam instrumentation systems designed for AWAKE and their performance during the 2016 proton beam commissioning period.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB119
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB121	Installation and Test of Pre-series Wire Scanners for the LHC Injector Upgrade Project at CERN	vacuum, controls, laser, detector	412
	R. Veness, P. Andersson, W. Andreazza, N. Chritin, B. Dehning, J. Emery, A. Goldblatt, D. Gudkov, F. Roncarolo, J.L. Sirvent, J. Tassan-Viol CERN, Geneva, Switzerland
	A new generation of fast wire scanners is being developed for the LHC Injectors Upgrade (LIU) project at CERN. These will be essential tools for transverse profile measurement with the higher brightness LIU beams, and are planned for installation in 2019 in all three synchrotrons making up the LHC injector chain. An active period of development and test has resulted in prototype installations in the SPS and PSB rings. This paper will summarise the design and report on the results to-date.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB121
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPIK072	Recent Upgrades of the Bunch Arrival Time Monitors at FLASH and European XFEL	laser, software, controls, electron	695
	M. Viti, M.K. Czwalinna, H. Dinter, C. Gerth, K.P. Przygoda, R. Rybaniec, H. Schlarb DESY, Hamburg, Germany
	In modern free electron laser facilities like FLASH and European XFEL a high resolution intra train bunch arrival time measurement is mandatory, providing a crucial information for the beam based feedback system. At FLASH and European XFEL a reliable arrival time detection with a resolution better than 0.1% is required for a broad range of bunch charges, from 1 nC down to 20 pC. The system developed is based on electro-optical sampling where an ultra-short pulsed laser is employed. Several bunch arrival time monitors (BAM) were developed and are since 2012 in operation at the FLASH facility. A major upgrade involved the development of new hardware and software based on the MTCA standard. Special operation mode at both facilities includes the possibility to subdivide the bunch train in up to three segments, each with different bunch energy and charge, causing variation of the time jitter within the bunch train itself. A further upgrade includes the measurement of the arrival time and application of delay correction for each of the three segments. In this poster, we describe the development, installation and commissioning of the hardware, firmware and software of the new system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK072
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPIK095	Implementation Issues and First Results of the ESS Beam Current Monitor System	linac, interface, ion-source, FPGA	745
	H. Hassanzadegan, M.D. Donna, A. Jansson, H. Kocevar, T.J. Shea ESS, Lund, Sweden M. Werner DESY, Hamburg, Germany
	The BCM system of the European Spallation Source needs to measure several beam parameters including pulse profile, charge, current, pulse width and repetition frequency. Moreover, it will measure differential beam currents using several ACCT pairs along the linac. This is particularly important at low beam energies where BLMs cannot be used for measuring beam losses. Due to the ESS-specific requirements, the BCM software and firmware will be customized. Also, parts of the electronics may need to be customized to be consistent with the ESS standard electronics platform, hence facilitate maintenance and maximize synergy with other systems. Technical challenges include maintaining signal integrity and a fast response despite large variations in the sensor cable length and ambient temperature, as well as minimizing the effect of the ground voltage fluctuations. This paper gives a general overview of the design and focuses on a few technical issues that are particularly important for satisfying the performance requirements. Also, BCM test results in laboratory conditions as well as preliminary results with the ESS ion source will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK095
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPAB007	Analysis of the Dependability of the LHC Quench Detection System During LHC Run 2 and Further System Evolution	radiation, operation, software, superconducting-magnet	1311
	T. Podzorny, D.O. Calcoen, R. Denz, A.P. Siemko, J. Spasic, J. Steckert CERN, Geneva, Switzerland
	The quench detection system (QDS) of the LHC superconducting circuits is an essential part of the LHC machine protection and ensures the integrity of key elements of the accelerator. The large amount of hardwired and software interlock channels of the QDS requires a very high system dependability in order to reduce the risk of affecting the successful operation of the LHC. This contribution will present methods and tools for systematic fault tracking and analysis, and will discuss recent results obtained during the LHC production run in 2016. Measures for maintaining and further improving of the system performance will be explained. An overview of the further evolution of the LHC QDS also in view of the upcoming High Luminosity Upgrade of the LHC will be given.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPAB007
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPAB088	Wire Position System to Consistently Measure and Record the Location Change of Girders Following Ground Changes	alignment, electron, undulator, power-supply	1523
	H. J. Choi, S.Y. Baek, H.-S. Kang, S.H. Kim, H.-G. Lee, S.B. Lee PAL, Pohang, Kyungbuk, Republic of Korea
	Several parts that comprise the large scientific device should be installed and operated at the accurate three-dimensional location coordinates where they should be subjected to survey and alignment. The location of the aligned parts should not be changed in order to ensure that the electron beam parameters of PAL-XFEL remain stable and can be operated without any problems. As time goes by, however, the ground goes through uplift and subsidence, which consequently deforms building floors. The deformation of the ground and buildings changes the location of several devices including magnets and RF accelerator tubes, which eventually leads to the alignment errors. Once alignment errors occur with regard to these parts, the electron beam deviates from its course and beam parameters change accordingly. PAL-XFEL has installed the Hydrostatic Leveling System to measure and record the vertical change of buildings and ground consistently and systematically and the Wire Position System to measure the two dimensional changes of girders. This paper is designed to introduce the operating principle and design concept of WPS and discuss the current situation regarding installation and operation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPAB088
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPIK059	Recent Progress of Dithering System at SuperKEKB	luminosity, feedback, background, optics	1827
	Y. Funakoshi, H. Fukuma, T. Kawamoto, M. Masuzawa, S. Nakamura, K. Ohmi, T. Oki, S. Uehara KEK, Ibaraki, Japan P. Bambade, D. El Khechen, D. Jehanno, V. Kubytskyi, C. Rimbault LAL, Orsay, France A.S. Fisher SLAC, Menlo Park, California, USA U. Wienands ANL, Argonne, Illinois, USA
	Recent progress of the dithering system at SuperKEKB is described. Some details of the system layout are shown. Beam orbit and optics related issues are discussed. Preliminary tests of the some components in the Phase 1 beam commissioning or in the bench are described.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK059
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPIK107	Upgrade of the Existing PID Controller and Oxygen Detection Alarm System for SRF Modules Operating in the Taiwan Light Source	SRF, controls, status, operation	1968
	F.-T. Chung, F.Y. Chang, L.-H. Chang, M.H. Chang, L.J. Chen, M.-C. Lin, Z.K. Liu, C.H. Lo, C.L. Tsai, Ch. Wang, M.-S. Yeh, T.-C. Yu NSRRC, Hsinchu, Taiwan
	A Cornell-type superconducting RF cavity module was installed in the Taiwan Light Source (TLS) in 2004. New control electronics for the existing SRF modules have been designed, based on the original designs. In addition to the functions for operation, this SRF electronics system in the TLS also provides protection for the SRF modules and cryogenic system. This paper presents the SRF electronics modifications, which will enhance machine protection and make it easy to adjust and optimize operational parameters.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK107
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPIK112	Progress Towards Nanometre-Level Beam Stabilisation Using a Cavity BPM System at ATF2	feedback, cavity, dipole, kicker	1986
	T. Bromwich, N. Blaskovic Kraljevic, R.M. Bodenstein, P. Burrows, G.B. Christian, C. Perry, R.L. Ramjiawan JAI, Oxford, United Kingdom
	A low-latency feedback system has been designed and tested to achieve inter-bunch position stabilisation at the final focus of the Accelerator Test Facility (ATF2) at KEK. This system has now been enhanced through the use of position information from two cavity beam position monitors (BPMs) to enable beam stabilisation at a third, intermediate location where a witness BPM measures the correction. Low-Q cavity BPMs were used, along with custom signal processing electronics designed for low latency and optimal position resolution. A custom stripline kicker, power amplifier and digital feedback board were used to provide beam correction and feedback control. The system was tested in single-pass, multi-bunch mode with the aim of providing inter-bunch beam stabilisation on electron bunches of charge ~1 nC separated in time by 280 ns. In 2015 a single BPM feedback system demonstrated beam stabilisation to below 75 nm. To date the two BPM input feedback system has demonstrated beam stabilisation to 83 ± 6 nm. This performance is limited by the current understanding of the cavity BPM resolution. Work will be described with the aim of improving this result.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK112
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPVA131	Single-Inductor Bipolar Outputs Power Converters	power-supply, impedance, controls, operation	3577
	Y.T. Li, C.Y. Liu, K.-B. Liu, B.S. Wang, Y.S. Wong NSRRC, Hsinchu, Taiwan
	In the circuit design for electronic products, bipolar power supply is often required. A non-isolated dual polarity power supply design is using two inductors to achieve this function. The number of inductors on the circuit would increase both the cost of products and space requirement. So the use of a single inductor bipolar power converter design can effectively reduce the cost and space to enhance product competitiveness. In this paper, the principle of a new single-inductor bipolar power converter will be described and tested to prove the feasibility of this design.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA131
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THOAB2	MicroTCA Technology Lab at DESY: Start-Up Phase Summary	operation, hardware, site, FPGA	3659
	T. Walter, M. Fenner, K. Kull, H. Schlarb DESY, Hamburg, Germany
	Funding: The MicroTCA Technology Lab at DESY is a Helmholtz Innovation Lab (HIL-02) and jointly funded by DESY, the Helmholtz Association, and industry. Over the last decade, technology transfer has emerged as an important mission of major public research facilities. Funding agencies, regional governments and society at large have placed high hopes in the combination of scientific research and on-site technology transfer departments that can turn discoveries and research tools into marketable products. Pursuing economic interests while preserving scientific freedom is a delicate balancing act that requires novel instruments in finance, administration and governance. The Helmholtz Association of German Research Centres addressed this challenge with a set of new frameworks: the Helmholtz Validation Funds (HVF) and the Helmholtz Innovation Labs (HIL). MicroTCA is a case in point: Since 2009, DESY has upgraded this standard significantly to provide state-of-the-art LLRF systems for the facilities FLASH and European XFEL. When the technology sparked interest elsewhere, DESY bundled its transfer activities in the HVF project MicroTCA.4 for Industry (2012-2015) and the HIL project MicroTCA Technology Lab (since October 2016). We report on intermediate results achieved by the MicroTCA Technology Lab after seven months of operation.
	Slides THOAB2 [6.655 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THOAB2
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPAB109	Fs Level Laser-to-RF Synchronization at REGAE	laser, timing, detector, electron	3972
	M. Titberidze, M. Felber, T. Lamb, H. Schlarb, C. Sydlo DESY, Hamburg, Germany R.A. Loch MPSD, Hamburg, Germany
	The Relativistic Electron Gun for Atomic Exploration (REGAE) is a unique linear accelerator capable of producing ultrashort (~ 10 fs) electron bunches for studying fast processes in matter by means of ultrafast electron diffraction (UED) experiments. Additionally, REGAE is suitable for upcoming external injection experiments for laser wakefield acceleration (LWFA). In order to carry out both mentioned experiments, it is crucial to achieve fs level stability in terms of Laser-to-RF synchronization. In this paper we present an advanced laser-to-RF synchronization scheme based on integrated Mach-Zehnder modulator. The setup demonstrated the Titanium Sapphire photo-injector laser synchronization with 11 fs (rms) precision in the bandwidth up to 100 kHz. Long term timing drift measurements showed unprecedented peak-to-peak stability of 31 fs (7 fs rms) over 43 hours of measurement time. In addition, AM-PM coefficient of the MZM based laser-to-RF synchronization setup has been evaluated and showed a factor of 10 improved performance compared to conventional direct conversion based laser synchronization setup.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB109
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPVA015	Application of Modified KV-Distributions to Study the Phase Portrait Transformation of Intense Bunches in Magnetic Fields	emittance, cyclotron, optics, multipole	4448
	H.Y. Barminova MEPhI, Moscow, Russia
	Modified KV-distribution functions are applied to study the intense bunch behavior in transverse magnetic fields. The functions used allow to consider both the emittance-dominated and charge-dominated bunches in 2D and 3D approximations. Peculiarities of the bunch phase portrait transformation in magnetic fields of achromatic structures are discussed. Particular case is proved to exist characterized by the absence of the emittance transfer.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA015
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPVA136	Non-Invasive Online Beam Monitor Using LHCb VELO	detector, proton, laser, medical-accelerators	4780
	R. Schnuerer The University of Liverpool, Liverpool, United Kingdom C.P. Welsch, S.L. Yap, H.D. Zhang Cockcroft Institute, Warrington, Cheshire, United Kingdom
	Funding: This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sk'odowska-Curie grant agreement No 675265 Online beam monitoring is essential for ion beam therapy to assure effective delivery of the beam and maintain patient safety for cancer treatment. One candidate for such a monitoring device is the LHCb Vertex Locator (VELO) detector. It is a position sensitive silicon detector with an advantageous semi-circular design which enables approaching the core of the beam without interfering with it. In this contribution, tests using an infrared laser to calibrate the detector and obtain information about its dynamic range, spatial and time resolution will be discussed. Initial results from using the detector at the 60 MeV proton therapy beamline at the Clatterbridge Cancer Centre (CCC), UK are also presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA136
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPAB043

Very First Experience with the Standard Diagnostics at the European XFEL

diagnostics, operation, electron, cavity

180

D. Lipka
DESY, Hamburg, Germany

The whole European XFEL becomes in operation this year. Dedicated standard diagnostics systems are installed and almost all types are tested at the injector before. Now the standard diagnostics are used to commission the facility. In this contribution the very first results and the operation experiences of the standard beam diagnostics of the entire European XFEL are reported.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB043

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB076

2D Beam Profile Monitors at CPHS of Tsinghua University

proton, target, ion, radiation

298

W. Wang, X. Guan, W.-H. Huang, Y. Lei, X.W. Wang, Q.Z. Xing, S.X. Zheng
TUB, Beijing, People's Republic of China
L. Du
CEA/IRFU, Gif-sur-Yvette, France
M.T. Qiu, Z.M. Wang
State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Shannxi, People's Republic of China

Beam profile is a key parameter for high current proton linac. Compact Pulsed Hadron Source(CPHS) has two type of detectors to monitor beam 2D beam profile: scintillator screen and rotatable multi-wire scanner. A retractable chromium-doped alumina (Chromox) screen is used as scintillator, emitted lights when impacted by proton are captured by a 12 bit CCD camera. Nineteen carbon fibre wires with a diameter of 30 'm, 3 mm separated from each other, are used to measure beam 1D distribution. Projection can be measured at different direction by rotating the multi-wire scanner about beam direction. 2D beam distribution is reconstructed from multiple projections with the help of CT. Different CT algorithms, Algebra Reconstruct Technique (ART) and Maximum Entropy algorithm (MENT), are applied to achieve accurate or quick reconstruction. The preliminary experimental results show the two profile monitors working consistently with each other.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB076

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB083

The New Beam Current Transformer for IR-FEL Facility at NSRL *

FEL, diagnostics, electron, induction

312

J.H. Wei, H. Li, X.Y. Liu, P. Lu, B.G. Sun, J.G. Wang, Q. Wang, F.F. Wu, Y.L. Yang, T.Y. Zhou
USTC/NSRL, Hefei, Anhui, People's Republic of China

Funding: Supported by The National Science Foundation of China (Grant No. 11575181)
The beam current transformer (CT) is an important part of the beam diagnostics system as a kind of non-destructive intensity measurement. The beam CT has the strong dependence of the sensitivity and time constant on the time structure of the beam. To measure the macro-pulse beam intensity with 5-10 's length and 238 MHzμpulse repetition rate in the IR-FEL, it is necessary to find a suitable material as the CT core which can meet the measure requirement of the beam current. In this paper, three different magnetic materials were tested to find out that the laminated amorphous core owned the best performance, meanwhile, the mechanical structure was designed. The finished product passed the acceptance test.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB083

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB092

Design and Performance of Digital BPM Processor for DCLS and SXFEL

FPGA, pick-up, cavity, controls

338

L.W. Lai, F.Z. Chen, Y.B. Leng, Y.B. Yan, N. Zhang
SSRF, Shanghai, People's Republic of China
J. Chen
SINAP, Shanghai, People's Republic of China

Funding: Work supported by National Natural Science Foundation (No. 11305253, 11575282)
A digital BPM processor has been developed in SINAP, which can be used on the signal processing of both stripline BPM and cavity BPM. The processor is a standalone system and providing 4 channels 120MS/s, 16 bits ADC and powerful Virtex-5 FPGA. The processor has been mas applied on Dalian Coherent Light Source and Shanghai X-ray FE. The processor specification and performance evaluations including lab and beam tests will be introduced.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB092

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB100

The Development of Button Type BPM Electronics for RAON

pick-up, ion, operation, FPGA

362

S.W. Jang, E.-S. Kim, Y. Lee
Korea University Sejong Campus, Sejong, Republic of Korea
Y.S. Chung, G.D. Kim, H.J. Woo
IBS, Daejeon, Republic of Korea
J.W. Kwon
Korea University, Seoul, Republic of Korea

RAON is a heavy ion accelerator for the Rare Isotope Science Project in Korea. The main goals of RAON is to accelerate various stable ions from ECR ion source and rare isotopes ions from ISOL beam line. For the stable beam operation, the beam diagnostics equipment is very important. Recently, we developed a digital board electronics for the button type beam position monitor (BPM) to measure the position of ion beams. In this presentation, design of electronics, beam signal simulation results, and RF measurement test results with a developed button BPM will be described.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB100

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB119

Beam Instrumentation Developments for the Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN

proton, electron, plasma, laser

404

S. Mazzoni, M. Barros Marin, B. Biskup, A. Boccardi, T.B. Bogey, S. Burger, F.S. Domingues Sousa, E. Effinger, J. Emery, A. Goldblatt, I. Gorgisyan, E. Gschwendtner, A. Guerrero, L.K. Jensen, T. Lefèvre, D. Medina, B. Moser, G. Schneider, L. Søby, M. Turner, M. Vicente Romero, M. Wendt
CERN, Geneva, Switzerland
B. Biskup
Czech Technical University, Prague 6, Czech Republic
M. Turner
TUG/ITP, Graz, Austria
V.A. Verzilov
TRIUMF, Vancouver, Canada

The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) at CERN aims to develop a proof-of-principle electron accelerator based on proton driven plasma wake-field acceleration. The core of AWAKE is a 10 metre long plasma cell filled with Rubidium vapour in which single, 400 GeV, proton bunches extracted from the CERN Super Proton Synchrotron (SPS) generate a strong plasma wakefield. The plasma is seeded using a femtosecond pulsed Ti:Sapphire laser. The aim of the experiment is to inject low energy electrons onto the plasma wake and accelerate them over this short distance to an energy of several GeV. To achieve its commissioning goals, AWAKE requires the precise measurement of the position and transverse profile of the laser, proton and electron beams as well as their temporal synchronisation. This contribution will present the beam instrumentation systems designed for AWAKE and their performance during the 2016 proton beam commissioning period.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB119

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB121

Installation and Test of Pre-series Wire Scanners for the LHC Injector Upgrade Project at CERN

vacuum, controls, laser, detector

412

R. Veness, P. Andersson, W. Andreazza, N. Chritin, B. Dehning, J. Emery, A. Goldblatt, D. Gudkov, F. Roncarolo, J.L. Sirvent, J. Tassan-Viol
CERN, Geneva, Switzerland

A new generation of fast wire scanners is being developed for the LHC Injectors Upgrade (LIU) project at CERN. These will be essential tools for transverse profile measurement with the higher brightness LIU beams, and are planned for installation in 2019 in all three synchrotrons making up the LHC injector chain. An active period of development and test has resulted in prototype installations in the SPS and PSB rings. This paper will summarise the design and report on the results to-date.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB121

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPIK072

Recent Upgrades of the Bunch Arrival Time Monitors at FLASH and European XFEL

laser, software, controls, electron

695

M. Viti, M.K. Czwalinna, H. Dinter, C. Gerth, K.P. Przygoda, R. Rybaniec, H. Schlarb
DESY, Hamburg, Germany

In modern free electron laser facilities like FLASH and European XFEL a high resolution intra train bunch arrival time measurement is mandatory, providing a crucial information for the beam based feedback system. At FLASH and European XFEL a reliable arrival time detection with a resolution better than 0.1% is required for a broad range of bunch charges, from 1 nC down to 20 pC. The system developed is based on electro-optical sampling where an ultra-short pulsed laser is employed. Several bunch arrival time monitors (BAM) were developed and are since 2012 in operation at the FLASH facility. A major upgrade involved the development of new hardware and software based on the MTCA standard. Special operation mode at both facilities includes the possibility to subdivide the bunch train in up to three segments, each with different bunch energy and charge, causing variation of the time jitter within the bunch train itself. A further upgrade includes the measurement of the arrival time and application of delay correction for each of the three segments. In this poster, we describe the development, installation and commissioning of the hardware, firmware and software of the new system.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK072

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPIK095

Implementation Issues and First Results of the ESS Beam Current Monitor System

linac, interface, ion-source, FPGA

745

H. Hassanzadegan, M.D. Donna, A. Jansson, H. Kocevar, T.J. Shea
ESS, Lund, Sweden
M. Werner
DESY, Hamburg, Germany

The BCM system of the European Spallation Source needs to measure several beam parameters including pulse profile, charge, current, pulse width and repetition frequency. Moreover, it will measure differential beam currents using several ACCT pairs along the linac. This is particularly important at low beam energies where BLMs cannot be used for measuring beam losses. Due to the ESS-specific requirements, the BCM software and firmware will be customized. Also, parts of the electronics may need to be customized to be consistent with the ESS standard electronics platform, hence facilitate maintenance and maximize synergy with other systems. Technical challenges include maintaining signal integrity and a fast response despite large variations in the sensor cable length and ambient temperature, as well as minimizing the effect of the ground voltage fluctuations. This paper gives a general overview of the design and focuses on a few technical issues that are particularly important for satisfying the performance requirements. Also, BCM test results in laboratory conditions as well as preliminary results with the ESS ion source will be presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK095

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPAB007

Analysis of the Dependability of the LHC Quench Detection System During LHC Run 2 and Further System Evolution

radiation, operation, software, superconducting-magnet

1311

T. Podzorny, D.O. Calcoen, R. Denz, A.P. Siemko, J. Spasic, J. Steckert
CERN, Geneva, Switzerland

The quench detection system (QDS) of the LHC superconducting circuits is an essential part of the LHC machine protection and ensures the integrity of key elements of the accelerator. The large amount of hardwired and software interlock channels of the QDS requires a very high system dependability in order to reduce the risk of affecting the successful operation of the LHC. This contribution will present methods and tools for systematic fault tracking and analysis, and will discuss recent results obtained during the LHC production run in 2016. Measures for maintaining and further improving of the system performance will be explained. An overview of the further evolution of the LHC QDS also in view of the upcoming High Luminosity Upgrade of the LHC will be given.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPAB007

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPAB088

Wire Position System to Consistently Measure and Record the Location Change of Girders Following Ground Changes

alignment, electron, undulator, power-supply

1523

H. J. Choi, S.Y. Baek, H.-S. Kang, S.H. Kim, H.-G. Lee, S.B. Lee
PAL, Pohang, Kyungbuk, Republic of Korea

Several parts that comprise the large scientific device should be installed and operated at the accurate three-dimensional location coordinates where they should be subjected to survey and alignment. The location of the aligned parts should not be changed in order to ensure that the electron beam parameters of PAL-XFEL remain stable and can be operated without any problems. As time goes by, however, the ground goes through uplift and subsidence, which consequently deforms building floors. The deformation of the ground and buildings changes the location of several devices including magnets and RF accelerator tubes, which eventually leads to the alignment errors. Once alignment errors occur with regard to these parts, the electron beam deviates from its course and beam parameters change accordingly. PAL-XFEL has installed the Hydrostatic Leveling System to measure and record the vertical change of buildings and ground consistently and systematically and the Wire Position System to measure the two dimensional changes of girders. This paper is designed to introduce the operating principle and design concept of WPS and discuss the current situation regarding installation and operation.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPAB088

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPIK059

Recent Progress of Dithering System at SuperKEKB

luminosity, feedback, background, optics

1827

Y. Funakoshi, H. Fukuma, T. Kawamoto, M. Masuzawa, S. Nakamura, K. Ohmi, T. Oki, S. Uehara
KEK, Ibaraki, Japan
P. Bambade, D. El Khechen, D. Jehanno, V. Kubytskyi, C. Rimbault
LAL, Orsay, France
A.S. Fisher
SLAC, Menlo Park, California, USA
U. Wienands
ANL, Argonne, Illinois, USA

Recent progress of the dithering system at SuperKEKB is described. Some details of the system layout are shown. Beam orbit and optics related issues are discussed. Preliminary tests of the some components in the Phase 1 beam commissioning or in the bench are described.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK059

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPIK107

Upgrade of the Existing PID Controller and Oxygen Detection Alarm System for SRF Modules Operating in the Taiwan Light Source

SRF, controls, status, operation

1968

F.-T. Chung, F.Y. Chang, L.-H. Chang, M.H. Chang, L.J. Chen, M.-C. Lin, Z.K. Liu, C.H. Lo, C.L. Tsai, Ch. Wang, M.-S. Yeh, T.-C. Yu
NSRRC, Hsinchu, Taiwan

A Cornell-type superconducting RF cavity module was installed in the Taiwan Light Source (TLS) in 2004. New control electronics for the existing SRF modules have been designed, based on the original designs. In addition to the functions for operation, this SRF electronics system in the TLS also provides protection for the SRF modules and cryogenic system. This paper presents the SRF electronics modifications, which will enhance machine protection and make it easy to adjust and optimize operational parameters.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK107

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPIK112

Progress Towards Nanometre-Level Beam Stabilisation Using a Cavity BPM System at ATF2

feedback, cavity, dipole, kicker

1986

T. Bromwich, N. Blaskovic Kraljevic, R.M. Bodenstein, P. Burrows, G.B. Christian, C. Perry, R.L. Ramjiawan
JAI, Oxford, United Kingdom

A low-latency feedback system has been designed and tested to achieve inter-bunch position stabilisation at the final focus of the Accelerator Test Facility (ATF2) at KEK. This system has now been enhanced through the use of position information from two cavity beam position monitors (BPMs) to enable beam stabilisation at a third, intermediate location where a witness BPM measures the correction. Low-Q cavity BPMs were used, along with custom signal processing electronics designed for low latency and optimal position resolution. A custom stripline kicker, power amplifier and digital feedback board were used to provide beam correction and feedback control. The system was tested in single-pass, multi-bunch mode with the aim of providing inter-bunch beam stabilisation on electron bunches of charge ~1 nC separated in time by 280 ns. In 2015 a single BPM feedback system demonstrated beam stabilisation to below 75 nm. To date the two BPM input feedback system has demonstrated beam stabilisation to 83 ± 6 nm. This performance is limited by the current understanding of the cavity BPM resolution. Work will be described with the aim of improving this result.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK112

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPVA131

Single-Inductor Bipolar Outputs Power Converters

power-supply, impedance, controls, operation

3577

Y.T. Li, C.Y. Liu, K.-B. Liu, B.S. Wang, Y.S. Wong
NSRRC, Hsinchu, Taiwan

In the circuit design for electronic products, bipolar power supply is often required. A non-isolated dual polarity power supply design is using two inductors to achieve this function. The number of inductors on the circuit would increase both the cost of products and space requirement. So the use of a single inductor bipolar power converter design can effectively reduce the cost and space to enhance product competitiveness. In this paper, the principle of a new single-inductor bipolar power converter will be described and tested to prove the feasibility of this design.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA131

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THOAB2

MicroTCA Technology Lab at DESY: Start-Up Phase Summary

operation, hardware, site, FPGA

3659

T. Walter, M. Fenner, K. Kull, H. Schlarb
DESY, Hamburg, Germany

Funding: The MicroTCA Technology Lab at DESY is a Helmholtz Innovation Lab (HIL-02) and jointly funded by DESY, the Helmholtz Association, and industry.
Over the last decade, technology transfer has emerged as an important mission of major public research facilities. Funding agencies, regional governments and society at large have placed high hopes in the combination of scientific research and on-site technology transfer departments that can turn discoveries and research tools into marketable products. Pursuing economic interests while preserving scientific freedom is a delicate balancing act that requires novel instruments in finance, administration and governance. The Helmholtz Association of German Research Centres addressed this challenge with a set of new frameworks: the Helmholtz Validation Funds (HVF) and the Helmholtz Innovation Labs (HIL). MicroTCA is a case in point: Since 2009, DESY has upgraded this standard significantly to provide state-of-the-art LLRF systems for the facilities FLASH and European XFEL. When the technology sparked interest elsewhere, DESY bundled its transfer activities in the HVF project MicroTCA.4 for Industry (2012-2015) and the HIL project MicroTCA Technology Lab (since October 2016). We report on intermediate results achieved by the MicroTCA Technology Lab after seven months of operation.

Slides THOAB2 [6.655 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THOAB2

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPAB109

Fs Level Laser-to-RF Synchronization at REGAE

laser, timing, detector, electron

3972

M. Titberidze, M. Felber, T. Lamb, H. Schlarb, C. Sydlo
DESY, Hamburg, Germany
R.A. Loch
MPSD, Hamburg, Germany

The Relativistic Electron Gun for Atomic Exploration (REGAE) is a unique linear accelerator capable of producing ultrashort (~ 10 fs) electron bunches for studying fast processes in matter by means of ultrafast electron diffraction (UED) experiments. Additionally, REGAE is suitable for upcoming external injection experiments for laser wakefield acceleration (LWFA). In order to carry out both mentioned experiments, it is crucial to achieve fs level stability in terms of Laser-to-RF synchronization. In this paper we present an advanced laser-to-RF synchronization scheme based on integrated Mach-Zehnder modulator. The setup demonstrated the Titanium Sapphire photo-injector laser synchronization with 11 fs (rms) precision in the bandwidth up to 100 kHz. Long term timing drift measurements showed unprecedented peak-to-peak stability of 31 fs (7 fs rms) over 43 hours of measurement time. In addition, AM-PM coefficient of the MZM based laser-to-RF synchronization setup has been evaluated and showed a factor of 10 improved performance compared to conventional direct conversion based laser synchronization setup.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB109

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPVA015

Application of Modified KV-Distributions to Study the Phase Portrait Transformation of Intense Bunches in Magnetic Fields

emittance, cyclotron, optics, multipole

4448

H.Y. Barminova
MEPhI, Moscow, Russia

Modified KV-distribution functions are applied to study the intense bunch behavior in transverse magnetic fields. The functions used allow to consider both the emittance-dominated and charge-dominated bunches in 2D and 3D approximations. Peculiarities of the bunch phase portrait transformation in magnetic fields of achromatic structures are discussed. Particular case is proved to exist characterized by the absence of the emittance transfer.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA015

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPVA136

Non-Invasive Online Beam Monitor Using LHCb VELO

detector, proton, laser, medical-accelerators

4780

R. Schnuerer
The University of Liverpool, Liverpool, United Kingdom
C.P. Welsch, S.L. Yap, H.D. Zhang
Cockcroft Institute, Warrington, Cheshire, United Kingdom

Funding: This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sk'odowska-Curie grant agreement No 675265
Online beam monitoring is essential for ion beam therapy to assure effective delivery of the beam and maintain patient safety for cancer treatment. One candidate for such a monitoring device is the LHCb Vertex Locator (VELO) detector. It is a position sensitive silicon detector with an advantageous semi-circular design which enables approaching the core of the beam without interfering with it. In this contribution, tests using an infrared laser to calibrate the detector and obtain information about its dynamic range, spatial and time resolution will be discussed. Initial results from using the detector at the 60 MeV proton therapy beamline at the Clatterbridge Cancer Centre (CCC), UK are also presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA136

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)