IBIC2019 - List of Keywords (pick-up)

Paper	Title	Other Keywords	Page
MOPP008	First Measurements of a New Type of Coreless Cryogenic Current Comparators (4C) for Non-Destructive Intensity Diagnostics of Charged Particles	shielding, cryogenics, niobium, coupling	82
	V. Tympel, T. Stöhlker HIJ, Jena, Germany S. Anders, J. Kunert, M. Schmelz, R. Stolz, V. Zakosarenko IPHT, Jena, Germany H. De Gersem, N. Marsic, W.F.O. Müller TEMF, TU Darmstadt, Darmstadt, Germany J. Golm, F. Schmidl, T. Schönau, P. Seidel, M. Stapelfeld FSU Jena, Jena, Germany D.M. Haider, M. Schwickert, T. Sieber, T. Stöhlker GSI, Darmstadt, Germany T. Stöhlker IOQ, Jena, Germany J. Tan CERN, Geneva, Switzerland V. Zakosarenko Supracon AG, Jena, Germany
	Funding: Supported by the BMBF, project numbers 05P15SJRBA, 05P18RDRB1 and 05P18SJRB1. The non-destructive and highly sensitive measurement of a charged particle beam is of utmost importance for modern particle accelerator facilities. A Cryogenic Current Comparator (CCC) can be used to measure beam currents in the nA-range. Therein, charged particles passing through a superconducting toroid induce screening currents at the surface of the toroid, which are measured via SQUIDs. Classical CCC beam monitors make use of a high magnetic permeability core as a flux-concentrator for the pickup coil. The core increases the pickup inductance and thus coupling to the beam, but unfortunately also raises low-frequency noise and thermal drift. In the new concept from the Leibniz Institute of Photonic Technology the Coreless Cryogenic Current Comparator (4C) completely omits this core and instead uses highly sensitive SQUIDs featuring sub-micron cross-type Josephson tunnel junctions. Combined with a new shielding geometry a compact and comparably lightweight design has been developed, which exhibits a current sensitivity of about 6 pA/sqrt(Hz) in the white noise region and a measured shielding factor of about 134 dB. V. Zakosarenko et al., Coreless SQUID-based cryogenic current comparator for non-destructive intensity diagnostics of charged particle beams, Supercond. Sci. Technol. 32 (2019) 014002.
	Poster MOPP008 [13.550 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP008
About •	paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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TUPP002	Direct-Sampling Coarse Bunch Arrival Time Monitor in the Free Electron Laser FLASH Based on the Fast Digitizer Implemented in the FMC VITA 57.1 Standard	FEL, electron, timing, free-electron-laser	275
	J. Zink, M.K. Czwalinna, M. Fenner, S. Jabłoński, J. Marjanovic, H. Schlarb DESY, Hamburg, Germany F. Gerfers Technische Universität Berlin, Berlin, Germany
	At the free-electron lasers FLASH and European-XFEL bunch arrival times are monitored with a high-accuracy electro-optical based data acquisition system (BAM). Due to only a couple of picoseconds time measurement range of this system, large timing changes might cause the monitor to fail. To remove any ambiguity and for health status monitoring a high-speed direct-sampling FPGA mezzanine card (FMC) and an analogue RF front-end was added. The circuitry has lower precision than the electro-optical based BAM, but it can determine bunch arrival time with respect to a reference signal over a large time range, i.e. of the order of 1 ms. After restarts or larger energy changes during operation, the electron bunch arrival time may have been changed by tens or even hundreds of picoseconds, which causes that the BAM is out of its operation range and needs to be recalibrated. With the solution developed, the BAM gets the coarse bunch timing from the digitizer and adjusts its optical delay lines accordingly. This allows for finding the operation point fast and automatically. Performance data of the fast direct-sampling digitizer FMC and first measurement data from FLASH will be presented.
	Poster TUPP002 [3.810 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP002
About •	paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPP034	Analysis of Quadrupolar Measurements for Beam Size Determination in the LHC	emittance, electron, electronics, multipole	397
	D. Alves, M. Gąsior, T. Lefèvre CERN, Meyrin, Switzerland
	Due to limitations with non-invasive beam size diagnostics in the LHC, particularly during the energy ramp, there has been an interest to explore quadrupolar-based measurements for estimating the transverse beam size, and hence determining the transverse emittance. This technique is especially attractive as it is completely passive and can use the existing beam position instrumentation. In this work, we perform an analysis of this method and present recent measurements taken during energy ramps. Quadrupolar-based measurements are compared with wire-scanner measurements and a calibration strategy is proposed to overcome present limitations.
	Poster TUPP034 [0.897 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP034
About •	paper received ※ 03 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019
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TUPP035	Development of Modular Spare Parts for the Profile and Position Monitors of the 590 MeV Beam Line at HIPA	shielding, vacuum, simulation, target	402
	R. Dölling, D.C. Kiselev, F. Marcellini, K.M. Zehnder PSI, Villigen PSI, Switzerland D. Berisha, J. Germanovic, K.M. Zehnder ABBTS, Baden, Switzerland
	A new generation of monitor plugs is under development for the ageing wire profile monitors and beam position monitors which are inserted into massive shielding of the 590 MeV proton beam line at HIPA. The modular mechanical design, aspects of handling, vacuum compatibility, radiation hardness, shielding, cabling and monitor environment are discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP035
About •	paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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WEAO04	Beam Measurements at the CERN SPS Using Interferometric Electro-Optic Pickups	simulation, laser, proton, luminosity	457
	A. Arteche, A. Bosco, S.M. Gibson Royal Holloway, University of London, Surrey, United Kingdom S.E. Bashforth, A. Bosco, S.M. Gibson JAI, Egham, Surrey, United Kingdom M. Krupa, T. Lefèvre CERN, Geneva, Switzerland
	Funding: Work supported by UK STFC grants ST/N001583/1, JAI at Royal Holloway University of London and CERN. Since 2016 a prototype electro-optic pickup has been installed on the SPS as part of the ongoing development of a high bandwidth electro-optic beam position monitor for the High Luminosity LHC. Following the success of initial beam signal observations with the prototype, improvements of the sensitivity and stability of the pickup have become the main focus of the project. A new concept has been developed which uses an interferometric technique to measure the image field of a passing bunch. One arm of an interferometer passes through an electro-optic lithium niobate crystal, embedded in a pickup, whereas the other arm bypasses. The recombination after the pickup results in an interference pattern that changes as a bunch passes by, due to the electro-optic response of the crystal to the image field. This technique enhances the sensitivity to the field and improves control of the working point. Results from high intensity beams at the SPS are presented. These include a comparison between two different interferometric configurations that were tested on different pickups with similar beam conditions. The stability is assessed by frequency scanning interferometry during beam operation.
	Slides WEAO04 [52.252 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEAO04
About •	paper received ※ 10 September 2019 paper accepted ※ 12 September 2019 issue date ※ 10 November 2019
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WEPP005	BPM Resolution Studies at PETRA III	brilliance, electron, electronics, optics	517
	G. Kube, J. Neugebauer, F. Schmidt-Föhre DESY, Hamburg, Germany
	In order to measure the noise level of a BPM system from beam generated orbit data, the correlated beam jitter has to be removed from the position signals. There exist different ways to extract the BPM noise, as the "three-BPM" correlation method or the model-independent principal components analysis (PCA). Both methods will shortly be reviewed. Based on a PCA, the resolution of the PETRA III Libera Brilliance based BPM system was measured. The results will be presented together with first measurements in view of an updated BPM system for the future PETRA IV project at DESY.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP005
About •	paper received ※ 02 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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WEPP013	Beam Commissioning of Beam Position and Phase Monitors for LIPAc	electron, electronics, MMI, MEBT	534
	I. Podadera, D. Gavela, A. Guirao, D. Jiménez-Rey, L.M. Martínez, J. Mollá, C. Oliver, R. Varela, V. Villamayor CIEMAT, Madrid, Spain T. Akagi, K. Kondo, Y. Shimosaki, T. Shinya, M. Sugimoto QST, Aomori, Japan L. Bellan, M. Comunian, F. Grespan, F. Scantamburlo INFN/LNL, Legnaro (PD), Italy P. Cara IFMIF/EVEDA, Rokkasho, Japan Y. Carin, H. Dzitko, D. Gex, A. Jokinen, I.M. Moya F4E, Germany A. Marqueta Fusion for Energy, Garching, Germany A. Rodríguez Páramo ESS Bilbao, Zamudio, Spain
	Funding: Work partially supported by the Spanish Ministry of Science and Innovation under project AIC-A-2011-0654 and FIS2013-40860-R The LIPAc accelerator is 9-MeV, 125-mA CW deuteron accelerator that aims to validate the technology that will be used in the future IFMIF accelerator (40-MeV, 2 x 125-mA CW). LIPAc is presently under beam commissioning of the second acceleration stage (injector and Radio Frequency Quadrupole) at 5 MeV. In this stage two types of BPM¿s are used: four stripline-type to control the transverse position and phase at the Medium Energy Beam Transport line (MEBT), and three other stripline-type mainly for the precise measurements of the mean beam energy at the Diagnostics Plate. All the BPM¿s have been successfully tested and served to increase the duty cycle and the average power of the beam delivered down to the beam dump. Moreover, the BPM¿s were key devices for the transverse beam positioning and longitudinal beam tuning and validation of the RFQ and re-buncher cavities at the MEBT. In this contribution, an overview of the beam position monitors system installation and characterization in the facility will be reported. First tests of the system with the upgraded acquisition electronics for the next phase will be also presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP013
About •	paper received ※ 04 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019
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WEPP014	A Report on Developments of the BCM and BPM Pickups of the ESS MEBT	MEBT, quadrupole, vacuum, impedance	539
	S. Varnasseri, I. Bustinduy, A. Conde, J. Martin, A. Ortega, I. Rueda, A.Z. Zugazaga ESS Bilbao, Zamudio, Spain R.A. Baron, H. Hassanzadegan, T.J. Shea ESS, Lund, Sweden
	In the framework of the Spanish In-Kind Contribution (IKC) to the construction of the European Spallation Source (ESS-ERIC), ESS-Bilbao is in charge of providing some key systems for the accelerator. In this paper, design and pre-delivery measurements of non-interceptive devices of MEBT (e.g Beam Position Monitor pick-ups, shielded ACCT and FCT) are reported. Overall there are 8 BPMs distributed in MEBT, which 7 of them are used for the beam position and phase measurements and one BPM is used for the fast timing characterization. The latter is used mainly to characterize the partially chopped bunches and rise/fall time of the Beam Chopper. Furthermore there are two ACCTs, one just attached to the beam dump and the other at the last raft of the MEBT. One FCT combined with the second ACCT gives the complementary information on the fast timing characteristics of the beam pulses.
	Poster WEPP014 [1.291 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP014
About •	paper received ※ 02 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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WEPP019	Concept of a Novel High-Bandwidth Arrival Time Monitor for Very Low Charges as a Part of the All-Optical Synchronization System at ELBE	laser, electron, FEL, FEM	560
	A. Penirschke THM, Friedberg, Germany W. Ackermann TEMF, TU Darmstadt, Darmstadt, Germany M.K. Czwalinna, H. Schlarb DESY, Hamburg, Germany M. Kuntzsch HZDR, Dresden, Germany
	Funding: This work is supported by the German Federal Ministry of Education and Research (BMBF) under contract no. 05K19RO1. Numerous advanced applications of X-ray free-electron lasers require pulse durations and time resolutions in the order of only a few femtoseconds or better. The generation of these pulses to be used in time-resolved experiments require synchronization techniques that can simultaneously lock all necessary components to a precision in the range of a few fs only. The CW operated electron accelerator ELBE at the Helmholtzzentrum Dresden Rossendorf uses a all-optical synchronization system to ensure a timing stability on the few 10 fs scale. ELBE requires a minimum beam pipe diameter of 43mm that limits the achievable output voltage of the pickup structure to drive the attached electro-optical modulator. This contribution presents a concept for a novel high-bandwidth arrival time monitor with sufficient output signal for the attached EOMs for very low charges as a part of the all-optical synchronization system at ELBE.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP019
About •	paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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WEPP035	Using Tune Measurement Systems Based on Diode Detectors for Quadrupolar Beam Oscillation Analysis in the Frequency Domain	operation, injection, betatron, detector	615
	M. Gąsior, T.E. Levens CERN, Geneva, Switzerland
	Requirements for diagnostics of injection matching and beam space charge effects have driven studies at CERN using high sensitivity tune measurement systems based on diode detectors for the observation of quadrupolar beam oscillations in the frequency domain. This has led to an extension of such tune systems to include a channel optimised for quadrupolar oscillation measurements. This paper presents the principles of such measurements, the developed hardware and example measurements.
	Poster WEPP035 [29.814 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP035
About •	paper received ※ 03 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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WEPP044	Beam Position Monitoring System for Fermilab’s Muon Campus	electronics, electron, proton, timing	648
	N. Patel, J.S. Diamond, N. Eddy, C.R. McClure, P.S. Prieto, D.C. Voy Fermilab, Batavia, Illinois, USA
	A Beam Position Monitor (BPM) system has been designed for Fermilab Muon Campus. The BPM system measures Turn-by-Turn orbits as well as Closed Orbits (average of multiple turns). While in the early commissioning phase of this program, preliminary measurements have been made using these BPMs. This paper discusses the design and implementation of these BPMs.
	Poster WEPP044 [0.612 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP044
About •	paper received ※ 09 September 2019 paper accepted ※ 12 September 2019 issue date ※ 10 November 2019
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WEPP046	Technology and First Beam Tests of the New CERN-SPS Beam Position System	electronics, electron, controls, radiation	655
	M. Wendt, M. Barros Marin, A. Boccardi, T.B. Bogey, I. Degl’Innocenti, A. Topaloudis CERN, Meyrin, Switzerland
	The CERN Super Proton Synchrotron (SPS) uses 215 beam position monitors (BPMs) to observe the beam orbit when accelerating protons or ions on a fast ramp cycle to beam energies of up to 450 GeV/c. In the frame of the CERN LHC Injector Upgrade (LIU) initiative the aged, and diffi- cult to maintain homodyne-receiver based BPM read-out system is currently being upgraded with A Logarithmic Po- sition System ¿ ALPS. As the name indicates, this new BPM electronics builds upon the experience at CERN with using logarithmic detector amplifiers for beam position processing, and is well suited to cover the large range of beam intensities accelerated in the SPS. The system will use radiation toler- ant electronics located in close proximity to the split-plane or stripline beam position monitor with GB/s optical data transmission to the processing electronics located on the surface. Technical details of the analog and digital signal processing, the data transmission using optical fibers, cal- ibration and testing, as well as first beam tests on a set of ALPS prototypes are presented in this paper.
	Poster WEPP046 [16.711 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP046
About •	paper received ※ 06 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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Paper

Title

Other Keywords

Page

First Measurements of a New Type of Coreless Cryogenic Current Comparators (4C) for Non-Destructive Intensity Diagnostics of Charged Particles

shielding, cryogenics, niobium, coupling

82

V. Tympel, T. Stöhlker
HIJ, Jena, Germany
S. Anders, J. Kunert, M. Schmelz, R. Stolz, V. Zakosarenko
IPHT, Jena, Germany
H. De Gersem, N. Marsic, W.F.O. Müller
TEMF, TU Darmstadt, Darmstadt, Germany
J. Golm, F. Schmidl, T. Schönau, P. Seidel, M. Stapelfeld
FSU Jena, Jena, Germany
D.M. Haider, M. Schwickert, T. Sieber, T. Stöhlker
GSI, Darmstadt, Germany
T. Stöhlker
IOQ, Jena, Germany
J. Tan
CERN, Geneva, Switzerland
V. Zakosarenko
Supracon AG, Jena, Germany

Funding: Supported by the BMBF, project numbers 05P15SJRBA, 05P18RDRB1 and 05P18SJRB1.
The non-destructive and highly sensitive measurement of a charged particle beam is of utmost importance for modern particle accelerator facilities. A Cryogenic Current Comparator (CCC) can be used to measure beam currents in the nA-range. Therein, charged particles passing through a superconducting toroid induce screening currents at the surface of the toroid, which are measured via SQUIDs. Classical CCC beam monitors make use of a high magnetic permeability core as a flux-concentrator for the pickup coil. The core increases the pickup inductance and thus coupling to the beam, but unfortunately also raises low-frequency noise and thermal drift. In the new concept from the Leibniz Institute of Photonic Technology the Coreless Cryogenic Current Comparator (4C) completely omits this core and instead uses highly sensitive SQUIDs featuring sub-micron cross-type Josephson tunnel junctions. Combined with a new shielding geometry a compact and comparably lightweight design has been developed, which exhibits a current sensitivity of about 6 pA/sqrt(Hz) in the white noise region and a measured shielding factor of about 134 dB*.
* V. Zakosarenko et al., Coreless SQUID-based cryogenic current comparator for non-destructive intensity diagnostics of charged particle beams, Supercond. Sci. Technol. 32 (2019) 014002.

Poster MOPP008 [13.550 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP008

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paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

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TUPP002

Direct-Sampling Coarse Bunch Arrival Time Monitor in the Free Electron Laser FLASH Based on the Fast Digitizer Implemented in the FMC VITA 57.1 Standard

FEL, electron, timing, free-electron-laser

275

J. Zink, M.K. Czwalinna, M. Fenner, S. Jabłoński, J. Marjanovic, H. Schlarb
DESY, Hamburg, Germany
F. Gerfers
Technische Universität Berlin, Berlin, Germany

At the free-electron lasers FLASH and European-XFEL bunch arrival times are monitored with a high-accuracy electro-optical based data acquisition system (BAM). Due to only a couple of picoseconds time measurement range of this system, large timing changes might cause the monitor to fail. To remove any ambiguity and for health status monitoring a high-speed direct-sampling FPGA mezzanine card (FMC) and an analogue RF front-end was added. The circuitry has lower precision than the electro-optical based BAM, but it can determine bunch arrival time with respect to a reference signal over a large time range, i.e. of the order of 1 ms. After restarts or larger energy changes during operation, the electron bunch arrival time may have been changed by tens or even hundreds of picoseconds, which causes that the BAM is out of its operation range and needs to be recalibrated. With the solution developed, the BAM gets the coarse bunch timing from the digitizer and adjusts its optical delay lines accordingly. This allows for finding the operation point fast and automatically. Performance data of the fast direct-sampling digitizer FMC and first measurement data from FLASH will be presented.

Poster TUPP002 [3.810 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP002

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paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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TUPP034

Analysis of Quadrupolar Measurements for Beam Size Determination in the LHC

emittance, electron, electronics, multipole

397

D. Alves, M. Gąsior, T. Lefèvre
CERN, Meyrin, Switzerland

Due to limitations with non-invasive beam size diagnostics in the LHC, particularly during the energy ramp, there has been an interest to explore quadrupolar-based measurements for estimating the transverse beam size, and hence determining the transverse emittance. This technique is especially attractive as it is completely passive and can use the existing beam position instrumentation. In this work, we perform an analysis of this method and present recent measurements taken during energy ramps. Quadrupolar-based measurements are compared with wire-scanner measurements and a calibration strategy is proposed to overcome present limitations.

Poster TUPP034 [0.897 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP034

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paper received ※ 03 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019

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TUPP035

Development of Modular Spare Parts for the Profile and Position Monitors of the 590 MeV Beam Line at HIPA

shielding, vacuum, simulation, target

402

R. Dölling, D.C. Kiselev, F. Marcellini, K.M. Zehnder
PSI, Villigen PSI, Switzerland
D. Berisha, J. Germanovic, K.M. Zehnder
ABBTS, Baden, Switzerland

A new generation of monitor plugs is under development for the ageing wire profile monitors and beam position monitors which are inserted into massive shielding of the 590 MeV proton beam line at HIPA. The modular mechanical design, aspects of handling, vacuum compatibility, radiation hardness, shielding, cabling and monitor environment are discussed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP035

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paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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WEAO04

Beam Measurements at the CERN SPS Using Interferometric Electro-Optic Pickups

simulation, laser, proton, luminosity

457

A. Arteche, A. Bosco, S.M. Gibson
Royal Holloway, University of London, Surrey, United Kingdom
S.E. Bashforth, A. Bosco, S.M. Gibson
JAI, Egham, Surrey, United Kingdom
M. Krupa, T. Lefèvre
CERN, Geneva, Switzerland

Funding: Work supported by UK STFC grants ST/N001583/1, JAI at Royal Holloway University of London and CERN.
Since 2016 a prototype electro-optic pickup has been installed on the SPS as part of the ongoing development of a high bandwidth electro-optic beam position monitor for the High Luminosity LHC. Following the success of initial beam signal observations with the prototype, improvements of the sensitivity and stability of the pickup have become the main focus of the project. A new concept has been developed which uses an interferometric technique to measure the image field of a passing bunch. One arm of an interferometer passes through an electro-optic lithium niobate crystal, embedded in a pickup, whereas the other arm bypasses. The recombination after the pickup results in an interference pattern that changes as a bunch passes by, due to the electro-optic response of the crystal to the image field. This technique enhances the sensitivity to the field and improves control of the working point. Results from high intensity beams at the SPS are presented. These include a comparison between two different interferometric configurations that were tested on different pickups with similar beam conditions. The stability is assessed by frequency scanning interferometry during beam operation.

Slides WEAO04 [52.252 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEAO04

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paper received ※ 10 September 2019 paper accepted ※ 12 September 2019 issue date ※ 10 November 2019

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WEPP005

BPM Resolution Studies at PETRA III

brilliance, electron, electronics, optics

517

G. Kube, J. Neugebauer, F. Schmidt-Föhre
DESY, Hamburg, Germany

In order to measure the noise level of a BPM system from beam generated orbit data, the correlated beam jitter has to be removed from the position signals. There exist different ways to extract the BPM noise, as the "three-BPM" correlation method or the model-independent principal components analysis (PCA). Both methods will shortly be reviewed. Based on a PCA, the resolution of the PETRA III Libera Brilliance based BPM system was measured. The results will be presented together with first measurements in view of an updated BPM system for the future PETRA IV project at DESY.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP005

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paper received ※ 02 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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WEPP013

Beam Commissioning of Beam Position and Phase Monitors for LIPAc

electron, electronics, MMI, MEBT

534

I. Podadera, D. Gavela, A. Guirao, D. Jiménez-Rey, L.M. Martínez, J. Mollá, C. Oliver, R. Varela, V. Villamayor
CIEMAT, Madrid, Spain
T. Akagi, K. Kondo, Y. Shimosaki, T. Shinya, M. Sugimoto
QST, Aomori, Japan
L. Bellan, M. Comunian, F. Grespan, F. Scantamburlo
INFN/LNL, Legnaro (PD), Italy
P. Cara
IFMIF/EVEDA, Rokkasho, Japan
Y. Carin, H. Dzitko, D. Gex, A. Jokinen, I.M. Moya
F4E, Germany
A. Marqueta
Fusion for Energy, Garching, Germany
A. Rodríguez Páramo
ESS Bilbao, Zamudio, Spain

Funding: Work partially supported by the Spanish Ministry of Science and Innovation under project AIC-A-2011-0654 and FIS2013-40860-R
The LIPAc accelerator is 9-MeV, 125-mA CW deuteron accelerator that aims to validate the technology that will be used in the future IFMIF accelerator (40-MeV, 2 x 125-mA CW). LIPAc is presently under beam commissioning of the second acceleration stage (injector and Radio Frequency Quadrupole) at 5 MeV. In this stage two types of BPM¿s are used: four stripline-type to control the transverse position and phase at the Medium Energy Beam Transport line (MEBT), and three other stripline-type mainly for the precise measurements of the mean beam energy at the Diagnostics Plate. All the BPM¿s have been successfully tested and served to increase the duty cycle and the average power of the beam delivered down to the beam dump. Moreover, the BPM¿s were key devices for the transverse beam positioning and longitudinal beam tuning and validation of the RFQ and re-buncher cavities at the MEBT. In this contribution, an overview of the beam position monitors system installation and characterization in the facility will be reported. First tests of the system with the upgraded acquisition electronics for the next phase will be also presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP013

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paper received ※ 04 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019

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WEPP014

A Report on Developments of the BCM and BPM Pickups of the ESS MEBT

MEBT, quadrupole, vacuum, impedance

539

S. Varnasseri, I. Bustinduy, A. Conde, J. Martin, A. Ortega, I. Rueda, A.Z. Zugazaga
ESS Bilbao, Zamudio, Spain
R.A. Baron, H. Hassanzadegan, T.J. Shea
ESS, Lund, Sweden

In the framework of the Spanish In-Kind Contribution (IKC) to the construction of the European Spallation Source (ESS-ERIC), ESS-Bilbao is in charge of providing some key systems for the accelerator. In this paper, design and pre-delivery measurements of non-interceptive devices of MEBT (e.g Beam Position Monitor pick-ups, shielded ACCT and FCT) are reported. Overall there are 8 BPMs distributed in MEBT, which 7 of them are used for the beam position and phase measurements and one BPM is used for the fast timing characterization. The latter is used mainly to characterize the partially chopped bunches and rise/fall time of the Beam Chopper. Furthermore there are two ACCTs, one just attached to the beam dump and the other at the last raft of the MEBT. One FCT combined with the second ACCT gives the complementary information on the fast timing characteristics of the beam pulses.

Poster WEPP014 [1.291 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP014

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paper received ※ 02 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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WEPP019

Concept of a Novel High-Bandwidth Arrival Time Monitor for Very Low Charges as a Part of the All-Optical Synchronization System at ELBE

laser, electron, FEL, FEM

560

A. Penirschke
THM, Friedberg, Germany
W. Ackermann
TEMF, TU Darmstadt, Darmstadt, Germany
M.K. Czwalinna, H. Schlarb
DESY, Hamburg, Germany
M. Kuntzsch
HZDR, Dresden, Germany

Funding: This work is supported by the German Federal Ministry of Education and Research (BMBF) under contract no. 05K19RO1.
Numerous advanced applications of X-ray free-electron lasers require pulse durations and time resolutions in the order of only a few femtoseconds or better. The generation of these pulses to be used in time-resolved experiments require synchronization techniques that can simultaneously lock all necessary components to a precision in the range of a few fs only. The CW operated electron accelerator ELBE at the Helmholtzzentrum Dresden Rossendorf uses a all-optical synchronization system to ensure a timing stability on the few 10 fs scale. ELBE requires a minimum beam pipe diameter of 43mm that limits the achievable output voltage of the pickup structure to drive the attached electro-optical modulator. This contribution presents a concept for a novel high-bandwidth arrival time monitor with sufficient output signal for the attached EOMs for very low charges as a part of the all-optical synchronization system at ELBE.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP019

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paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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WEPP035

Using Tune Measurement Systems Based on Diode Detectors for Quadrupolar Beam Oscillation Analysis in the Frequency Domain

operation, injection, betatron, detector

615

M. Gąsior, T.E. Levens
CERN, Geneva, Switzerland

Requirements for diagnostics of injection matching and beam space charge effects have driven studies at CERN using high sensitivity tune measurement systems based on diode detectors for the observation of quadrupolar beam oscillations in the frequency domain. This has led to an extension of such tune systems to include a channel optimised for quadrupolar oscillation measurements. This paper presents the principles of such measurements, the developed hardware and example measurements.

Poster WEPP035 [29.814 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP035

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paper received ※ 03 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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WEPP044

Beam Position Monitoring System for Fermilab’s Muon Campus

electronics, electron, proton, timing

648

N. Patel, J.S. Diamond, N. Eddy, C.R. McClure, P.S. Prieto, D.C. Voy
Fermilab, Batavia, Illinois, USA

A Beam Position Monitor (BPM) system has been designed for Fermilab Muon Campus. The BPM system measures Turn-by-Turn orbits as well as Closed Orbits (average of multiple turns). While in the early commissioning phase of this program, preliminary measurements have been made using these BPMs. This paper discusses the design and implementation of these BPMs.

Poster WEPP044 [0.612 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP044

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paper received ※ 09 September 2019 paper accepted ※ 12 September 2019 issue date ※ 10 November 2019

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WEPP046

Technology and First Beam Tests of the New CERN-SPS Beam Position System

electronics, electron, controls, radiation

655

M. Wendt, M. Barros Marin, A. Boccardi, T.B. Bogey, I. Degl’Innocenti, A. Topaloudis
CERN, Meyrin, Switzerland

The CERN Super Proton Synchrotron (SPS) uses 215 beam position monitors (BPMs) to observe the beam orbit when accelerating protons or ions on a fast ramp cycle to beam energies of up to 450 GeV/c. In the frame of the CERN LHC Injector Upgrade (LIU) initiative the aged, and diffi- cult to maintain homodyne-receiver based BPM read-out system is currently being upgraded with A Logarithmic Po- sition System ¿ ALPS. As the name indicates, this new BPM electronics builds upon the experience at CERN with using logarithmic detector amplifiers for beam position processing, and is well suited to cover the large range of beam intensities accelerated in the SPS. The system will use radiation toler- ant electronics located in close proximity to the split-plane or stripline beam position monitor with GB/s optical data transmission to the processing electronics located on the surface. Technical details of the analog and digital signal processing, the data transmission using optical fibers, cal- ibration and testing, as well as first beam tests on a set of ALPS prototypes are presented in this paper.

Poster WEPP046 [16.711 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP046

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paper received ※ 06 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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