IBIC2019 - List of Keywords (monitoring)

Paper	Title	Other Keywords	Page
MOPP001	Safety Classified System Using Beam Intensity Monitoring for the Respect of Nuclear Requirements of SPIRAL2 Facility	controls, experiment, machine-protect, linac	55
	P. Anger, C. Berthe, F. Bucaille, V. Desmezières, C.H. Haquin, C. Jamet, S. Leloir, G. Normand, JC-P. Pacary, S.P.G. Perret-Gatel, A. Savalle GANIL, Caen, France
	The SPIRAL2 Facility at GANIL is based on the construction of a superconducting ion CW LINAC (up to 5 mA - 40 MeV deuteron beams and up to 1 mA - 14.5 MeV/u heavy ion beams) with 2 experimental areas called S3 and NFS. The building, the accelerator and experimental equipment studies started in 2009. For safety classified system using beam intensity monitoring, SPIRAL2 project system engineering sets up a specific reinforced process, based on V-Model, to validate, at each step, all the requirements (technical, nuclear safety, quality, reliability, interfaces…) from the functional specifications to the final validation. Since 2016, the main part of the safety devices is installed and is currently under testing. These tests which are pre-requisites to deliver the first beam will demonstrate that both functional and safety requirements are fulfilled. This contribution will describe the requirements (operation field, limitation of equipment activation¿), the technical studies, the failure mode and effects analysis, the tests, the status and results of the SPIRAL2 Machine Protection System using AC and DC current transformers to measure and control the beam intensity.
	Poster MOPP001 [1.786 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP001
About •	paper received ※ 04 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPP022	Neutron Sensitive Beam Loss Monitoring System for the ESS Linac	detector, neutron, linac, DTL	131
	I. Dolenc Kittelmann, F.S. Alves, E.C. Bergman, C.S. Derrez, V. Grishin, K.E. Rosengren, T.J. Shea ESS, Lund, Sweden Q. Bertrand, T.J. Joannem, Ph. Legou, Y. Mariette, V. Nadot, T. Papaevangelou, L. Segui CEA-IRFU, Gif-sur-Yvette, France W. Cichalewski, G.W. Jabłoński, W. Jałmużna, R. Kiełbik TUL-DMCS, Łódź, Poland
	The European Spallation Source, currently under construction in Lund, Sweden, will be a neutron source based on partly superconducting linac, accelerating protons to 2GeV with a peak current of 62.5mA, ultimately delivering a 5MW beam to a rotating tungsten target. For a successful tuning and operation of a linac, a Beam Loss Monitoring (BLM) system is required. The system is designed to protect the machine from beam-induced damage and unnecessary activation of the components. This contribution focuses on one of the BLM systems to be deployed at the ESS linac, namely the neutron sensitive BLM (nBLM). Recently, test of the nBLM data acquisition chain including the detector has been performed at LINAC4, at CERN. The test represents first evaluation of the system prototype in realistic environment. Results of the test will be presented together with an overview of the ESS nBLM system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP022
About •	paper received ※ 04 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPP023	Ionisation Chamber Based Beam Loss Monitoring System for the ESS Linac	detector, linac, background, neutron	136
	I. Dolenc Kittelmann, F.S. Alves, E.C. Bergman, C.S. Derrez, T.J. Grandsaert, V. Grishin, T.J. Shea ESS, Lund, Sweden W. Cichalewski, G.W. Jabłoński, W. Jałmużna, R. Kiełbik TUL-DMCS, Łódź, Poland
	The European Spallation Source, currently under construction in Lund, Sweden, will be a neutron source based on partly superconducting linac, accelerating protons to 2GeV with a peak current of 62.5mA, ultimately delivering a 5MW beam to a rotating tungsten target. One of the most critical elements for the protection of an accelerator is its Beam Loss Monitoring (BLM) system. The system is designed to protect the machine from beam-induced damage and unnecessary activation of the components. This contribution focuses on one of the BLM systems to be deployed at the ESS linac, namely the Ionisation Chamber based BLM (ICBLM). Several test campaigns have been performed at various facilities. Results of these tests will be presented here together with an overview of the ESS ICBLM system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP023
About •	paper received ※ 04 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUBO03	Challenges in Continuous Beam Profile Monitoring for MW-Power Proton Beams	proton, target, extraction, experiment	253
	M.L. Friend KEK, Ibaraki, Japan
	Continuous beam profile monitoring of the high-power proton beam is essential for protection of beamline equipment, as well as for producing high-quality physics results, in fixed-target extraction beamlines. Challenges in continuous profile monitoring include degradation of materials after long-term exposure to the proton beam, as well as beam loss due to that material intercepting the beam, which can additionally cause activation of nearby equipment. An overview of various profile monitoring techniques used in high-power neutrino extraction beamlines, issues faced so far at beam powers up to several hundred kW, and some possible future profile monitoring solutions for MW-class beamlines will be shown.
	Slides TUBO03 [13.146 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUBO03
About •	paper received ※ 09 September 2019 paper accepted ※ 11 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPP029	Stripline-based Non-destructive Beam Profile Monitoring System for Muon g-2/EDM Experiment at J-PARC	coupling, multipole, quadrupole, dipole	377
	C.K. Sung, M. Chung UNIST, Ulsan, Republic of Korea S. Hacıömeroğlu IBS, Daejeon, Republic of Korea Y.K. Semertzidis CAPP/IBS, Daejeon, Republic of Korea Y.K. Semertzidis KAIST, Daejeon, Republic of Korea
	The muon g-2/EDM experiment at J-PARC aims to measure the muon magnetic moment anomaly, a_¿ and electric dipole moment, d_¿ by introducing an approach excluding any electric field with measurement goal of 450 and 70 ppb for statistical and systematic uncertainty of a_¿ , respectively, and sensitivity of 1.5·10^-21 e¿cm for d_¿. In order to achieve the precision, the beam needs to manipulated such that the X and Y components are coupled by means of skew quadrupole magnets through the transmission line. The XY coupling quality can affect the transmission and storage efficiency so that its failure causes systematic error. Since it is significant to monitor the XY coupling status during the beam operation, a non-destructive beam profile monitoring system is under development to investigate the XY coupling quality so as to reduce the source of systematic uncertainties. The device consists of stripline electrodes installed with 45 deg. rotational symmetry. It will reconstruct the coupling parameters such as skew angle and beam size by using the FFT-based algorithm. This work presents the simulation result on the reconstruction and the wire test result for the prototype device.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP029
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)

TUPP032	J-PARC Test of ESS Beam on Target Diagnostics Prototypes Aperture Monitor and GRID	target, electron, proton, HOM	387
	C.A. Thomas, J. Etxeberria, H. Kocevar, J.P.S. Martins, T.J. Shea ESS, Lund, Sweden A.J. Johansson, M. Törmänen Lund University, Lund, Sweden S.I. Meigo, M. Ooi JAEA/J-PARC, Tokai-mura, Japan H. Niu, B. Zhang IMP/CAS, Lanzhou, People’s Republic of China
	The ESS high power beam will be delivered to the spallation target with high degree of control. To this end, we have designed a suite of instruments which provide measurement of the beam characteristics in a drift space a few meters from the target. Two of these instruments, the APTerure Monitor (APTM) and the GRID are presented. The APTM is designed to measure the fraction of beam going through the defined aperture; its time acquisition ranges from intra-pulse at µs sampling rate to many pulses over seconds. The GRID measures the projected horizontal and vertical profiles, sampling the pulse at 1MHz. A prototype of these two instruments has been designed and installed in the 3NBT dump line of J-PARC. They are designed to test functionality of these instruments in a similar environment as ESS. The 3NBT Dump line at J-PARC presents such an environment. In the second part of the paper we report the results and the measurements performed to test the prototypes. Before concluding we will discuss the results and propose improvements to the instruments final design.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP032
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)

TUPP044	Multiple Synchrotron Light Monitors for Transverse Matching and Monitoring at CEBAF	emittance, synchrotron, quadrupole, alignment	439
	B.G. Freeman, J. Gubeli, M.G. Tiefenback JLab, Newport News, Virginia, USA
	Funding: DOE Contract No. DE-AC05-06OR23177 Beam setup at the Continuous Electron Beam Accelerator Facility (CEBAF) involves threading beam through the machine, monitoring global transfer functions to identify and address cumulative lattice errors. Transverse beam emittance may grow by as much as two orders of magnitude, mediated by synchrotron radiation. Re-matching the enlarged beam phase space into successive re-circulation arcs minimizes this emittance growth but requires knowledge of the actual beam distribution. This is now accomplished through quadrupole scans using wire profile monitors, the most time-consuming activity in our setup process. We propose to use Synchrotron Light Monitors (SLMs) to image the beam at homologous points in the four super-period recirculation arc lattices. Benefits include real-time monitoring of beam parameters and reduced elapsed time for initial setup. These SLMs will be installed in Arc 7 of the CEBAF machine, where Synchrotron Radiation contributes moderately to emittance growth. One of four required SLMs will be installed and commissioned this year, with the rest being installed next year.
	Poster TUPP044 [0.170 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP044
About •	paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP006	Operational Performance of New Detection Electronics for Stripline-Type Beam Position Monitors at the SuperKEKB Injector Linac	linac, quadrupole, operation, emittance	522
	F. Miyahara, K. Furukawa, M. Satoh, Y. Seimiya, T. Suwada KEK, Ibaraki, Japan
	SuperKEKB injector linac delivers four different beam modes modulated pulse by pulse at 50 Hz, which have 100-times different beam charges, and a pulse may contain two bunches only 96-ns apart. Required low-emittance beams for SuperKEKB rings would need precise beam orbit controls in order to suppress the transverse wakefield in the accelerating structures. A new detection electronics with a wide dynamic range of 40 dB with a high resolution based on a 180-MHz narrow-band detection technique for stripline-type beam position monitors (BPMs) has been developed for the SuperKEKB injector linac. While such measurement condition is challenging, a position resolution of 3 micrometer in one standard deviation was successfully achieved with beam-based tests. The self-calibration system is also installed in order to compensate gain drifts for each input channel with an accuracy down to 0.1%, by using test pulses going through stripline heads between 50-Hz beam pulses. The design concept of the new detection electronics is described in detail, as well as operational performance of synchronized measurement with 100 BPMs for injection beams to four electron/positron storage rings.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP006
About •	paper received ※ 09 September 2019 paper accepted ※ 11 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THAO02	Towards Full Silicon 4H-SiC Based X-Ray Beam Monitoring	feedback, storage-ring, synchrotron, experiment	665
	M. Camarda, M. Birri, M. Carulla, D. Grolimund, B. Meyer, C. Pradervand PSI, Villigen PSI, Switzerland U. Grossner, S.M. Nida, A. Tsibizov, T. Ziemann ETH, Zurich, Switzerland
	In this work, we present extensive theoretical and experimental results of novel Silicon Carbide x-ray sensors for beam position monitoring (XBPM). Until recently, diamond, was considered the material-of-choice for continuous monitoring of hard (>6keV) x-ray beams at synchrotron light sources. Diamond XBPM are now commercially available as single crystal* and polycrystalline sensors. However, in a recently published paper, we have shown that Silicon Carbide is superior to both diamond crystal types in several critical aspects. Specifically, we found superior electrical characteristics (sensor dynamics, signal uniformity, signal strength) and superior optical properties (full device transparency, device active area, signal strength) when compared to commercial polycrystalline and single crystal diamond, respectively. We also succeeded in the ¿industrialization¿ of the SiC fabrication process, allowing for the simultaneous realization of several (>40) sensors in up to 4¿ SiC wafers, with high yields. More recently we have also analyzed the fluorescence of SiC sensors as compared to YAG ones, finding that SiC can also be used for hybrid position/shape monitoring schema. CIVIDEC. AT, SYDORTECHNOLOGIES. COM DECTRIS. COM * S. Nida, et. al. Silicon carbide X-ray beam position monitors for synchrotron applications J. Synchrotron Rad. 26, 28-35 (2019)
	Slides THAO02 [9.963 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-THAO02
About •	paper received ※ 11 September 2019 paper accepted ※ 11 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPP001

Safety Classified System Using Beam Intensity Monitoring for the Respect of Nuclear Requirements of SPIRAL2 Facility

controls, experiment, machine-protect, linac

55

P. Anger, C. Berthe, F. Bucaille, V. Desmezières, C.H. Haquin, C. Jamet, S. Leloir, G. Normand, JC-P. Pacary, S.P.G. Perret-Gatel, A. Savalle
GANIL, Caen, France

The SPIRAL2 Facility at GANIL is based on the construction of a superconducting ion CW LINAC (up to 5 mA - 40 MeV deuteron beams and up to 1 mA - 14.5 MeV/u heavy ion beams) with 2 experimental areas called S3 and NFS. The building, the accelerator and experimental equipment studies started in 2009. For safety classified system using beam intensity monitoring, SPIRAL2 project system engineering sets up a specific reinforced process, based on V-Model, to validate, at each step, all the requirements (technical, nuclear safety, quality, reliability, interfaces…) from the functional specifications to the final validation. Since 2016, the main part of the safety devices is installed and is currently under testing. These tests which are pre-requisites to deliver the first beam will demonstrate that both functional and safety requirements are fulfilled. This contribution will describe the requirements (operation field, limitation of equipment activation¿), the technical studies, the failure mode and effects analysis, the tests, the status and results of the SPIRAL2 Machine Protection System using AC and DC current transformers to measure and control the beam intensity.

Poster MOPP001 [1.786 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP001

About •

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

Export •

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

MOPP022

Neutron Sensitive Beam Loss Monitoring System for the ESS Linac

detector, neutron, linac, DTL

131

I. Dolenc Kittelmann, F.S. Alves, E.C. Bergman, C.S. Derrez, V. Grishin, K.E. Rosengren, T.J. Shea
ESS, Lund, Sweden
Q. Bertrand, T.J. Joannem, Ph. Legou, Y. Mariette, V. Nadot, T. Papaevangelou, L. Segui
CEA-IRFU, Gif-sur-Yvette, France
W. Cichalewski, G.W. Jabłoński, W. Jałmużna, R. Kiełbik
TUL-DMCS, Łódź, Poland

The European Spallation Source, currently under construction in Lund, Sweden, will be a neutron source based on partly superconducting linac, accelerating protons to 2GeV with a peak current of 62.5mA, ultimately delivering a 5MW beam to a rotating tungsten target. For a successful tuning and operation of a linac, a Beam Loss Monitoring (BLM) system is required. The system is designed to protect the machine from beam-induced damage and unnecessary activation of the components. This contribution focuses on one of the BLM systems to be deployed at the ESS linac, namely the neutron sensitive BLM (nBLM). Recently, test of the nBLM data acquisition chain including the detector has been performed at LINAC4, at CERN. The test represents first evaluation of the system prototype in realistic environment. Results of the test will be presented together with an overview of the ESS nBLM system.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP022

About •

paper received ※ 04 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019

Export •

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

MOPP023

Ionisation Chamber Based Beam Loss Monitoring System for the ESS Linac

detector, linac, background, neutron

136

I. Dolenc Kittelmann, F.S. Alves, E.C. Bergman, C.S. Derrez, T.J. Grandsaert, V. Grishin, T.J. Shea
ESS, Lund, Sweden
W. Cichalewski, G.W. Jabłoński, W. Jałmużna, R. Kiełbik
TUL-DMCS, Łódź, Poland

The European Spallation Source, currently under construction in Lund, Sweden, will be a neutron source based on partly superconducting linac, accelerating protons to 2GeV with a peak current of 62.5mA, ultimately delivering a 5MW beam to a rotating tungsten target. One of the most critical elements for the protection of an accelerator is its Beam Loss Monitoring (BLM) system. The system is designed to protect the machine from beam-induced damage and unnecessary activation of the components. This contribution focuses on one of the BLM systems to be deployed at the ESS linac, namely the Ionisation Chamber based BLM (ICBLM). Several test campaigns have been performed at various facilities. Results of these tests will be presented here together with an overview of the ESS ICBLM system.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP023

About •

paper received ※ 04 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019

Export •

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

TUBO03

Challenges in Continuous Beam Profile Monitoring for MW-Power Proton Beams

proton, target, extraction, experiment

253

M.L. Friend
KEK, Ibaraki, Japan

Continuous beam profile monitoring of the high-power proton beam is essential for protection of beamline equipment, as well as for producing high-quality physics results, in fixed-target extraction beamlines. Challenges in continuous profile monitoring include degradation of materials after long-term exposure to the proton beam, as well as beam loss due to that material intercepting the beam, which can additionally cause activation of nearby equipment. An overview of various profile monitoring techniques used in high-power neutrino extraction beamlines, issues faced so far at beam powers up to several hundred kW, and some possible future profile monitoring solutions for MW-class beamlines will be shown.

Slides TUBO03 [13.146 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUBO03

About •

paper received ※ 09 September 2019 paper accepted ※ 11 September 2019 issue date ※ 10 November 2019

Export •

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

TUPP029

Stripline-based Non-destructive Beam Profile Monitoring System for Muon g-2/EDM Experiment at J-PARC

coupling, multipole, quadrupole, dipole

377

C.K. Sung, M. Chung
UNIST, Ulsan, Republic of Korea
S. Hacıömeroğlu
IBS, Daejeon, Republic of Korea
Y.K. Semertzidis
CAPP/IBS, Daejeon, Republic of Korea
Y.K. Semertzidis
KAIST, Daejeon, Republic of Korea

The muon g-2/EDM experiment at J-PARC aims to measure the muon magnetic moment anomaly, a_¿ and electric dipole moment, d_¿ by introducing an approach excluding any electric field with measurement goal of 450 and 70 ppb for statistical and systematic uncertainty of a_¿ , respectively, and sensitivity of 1.5·10^-21 e¿cm for d_¿. In order to achieve the precision, the beam needs to manipulated such that the X and Y components are coupled by means of skew quadrupole magnets through the transmission line. The XY coupling quality can affect the transmission and storage efficiency so that its failure causes systematic error. Since it is significant to monitor the XY coupling status during the beam operation, a non-destructive beam profile monitoring system is under development to investigate the XY coupling quality so as to reduce the source of systematic uncertainties. The device consists of stripline electrodes installed with 45 deg. rotational symmetry. It will reconstruct the coupling parameters such as skew angle and beam size by using the FFT-based algorithm. This work presents the simulation result on the reconstruction and the wire test result for the prototype device.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP029

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)

TUPP032

J-PARC Test of ESS Beam on Target Diagnostics Prototypes Aperture Monitor and GRID

target, electron, proton, HOM

387

C.A. Thomas, J. Etxeberria, H. Kocevar, J.P.S. Martins, T.J. Shea
ESS, Lund, Sweden
A.J. Johansson, M. Törmänen
Lund University, Lund, Sweden
S.I. Meigo, M. Ooi
JAEA/J-PARC, Tokai-mura, Japan
H. Niu, B. Zhang
IMP/CAS, Lanzhou, People’s Republic of China

The ESS high power beam will be delivered to the spallation target with high degree of control. To this end, we have designed a suite of instruments which provide measurement of the beam characteristics in a drift space a few meters from the target. Two of these instruments, the APTerure Monitor (APTM) and the GRID are presented. The APTM is designed to measure the fraction of beam going through the defined aperture; its time acquisition ranges from intra-pulse at µs sampling rate to many pulses over seconds. The GRID measures the projected horizontal and vertical profiles, sampling the pulse at 1MHz. A prototype of these two instruments has been designed and installed in the 3NBT dump line of J-PARC. They are designed to test functionality of these instruments in a similar environment as ESS. The 3NBT Dump line at J-PARC presents such an environment. In the second part of the paper we report the results and the measurements performed to test the prototypes. Before concluding we will discuss the results and propose improvements to the instruments final design.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP032

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)

TUPP044

Multiple Synchrotron Light Monitors for Transverse Matching and Monitoring at CEBAF

emittance, synchrotron, quadrupole, alignment

439

B.G. Freeman, J. Gubeli, M.G. Tiefenback
JLab, Newport News, Virginia, USA

Funding: DOE Contract No. DE-AC05-06OR23177
Beam setup at the Continuous Electron Beam Accelerator Facility (CEBAF) involves threading beam through the machine, monitoring global transfer functions to identify and address cumulative lattice errors. Transverse beam emittance may grow by as much as two orders of magnitude, mediated by synchrotron radiation. Re-matching the enlarged beam phase space into successive re-circulation arcs minimizes this emittance growth but requires knowledge of the actual beam distribution. This is now accomplished through quadrupole scans using wire profile monitors, the most time-consuming activity in our setup process. We propose to use Synchrotron Light Monitors (SLMs) to image the beam at homologous points in the four super-period recirculation arc lattices. Benefits include real-time monitoring of beam parameters and reduced elapsed time for initial setup. These SLMs will be installed in Arc 7 of the CEBAF machine, where Synchrotron Radiation contributes moderately to emittance growth. One of four required SLMs will be installed and commissioned this year, with the rest being installed next year.

Poster TUPP044 [0.170 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP044

About •

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

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

WEPP006

Operational Performance of New Detection Electronics for Stripline-Type Beam Position Monitors at the SuperKEKB Injector Linac

linac, quadrupole, operation, emittance

522

F. Miyahara, K. Furukawa, M. Satoh, Y. Seimiya, T. Suwada
KEK, Ibaraki, Japan

SuperKEKB injector linac delivers four different beam modes modulated pulse by pulse at 50 Hz, which have 100-times different beam charges, and a pulse may contain two bunches only 96-ns apart. Required low-emittance beams for SuperKEKB rings would need precise beam orbit controls in order to suppress the transverse wakefield in the accelerating structures. A new detection electronics with a wide dynamic range of 40 dB with a high resolution based on a 180-MHz narrow-band detection technique for stripline-type beam position monitors (BPMs) has been developed for the SuperKEKB injector linac. While such measurement condition is challenging, a position resolution of 3 micrometer in one standard deviation was successfully achieved with beam-based tests. The self-calibration system is also installed in order to compensate gain drifts for each input channel with an accuracy down to 0.1%, by using test pulses going through stripline heads between 50-Hz beam pulses. The design concept of the new detection electronics is described in detail, as well as operational performance of synchronized measurement with 100 BPMs for injection beams to four electron/positron storage rings.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP006

About •

paper received ※ 09 September 2019 paper accepted ※ 11 September 2019 issue date ※ 10 November 2019

Export •

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

THAO02

Towards Full Silicon 4H-SiC Based X-Ray Beam Monitoring

feedback, storage-ring, synchrotron, experiment

665

M. Camarda, M. Birri, M. Carulla, D. Grolimund, B. Meyer, C. Pradervand
PSI, Villigen PSI, Switzerland
U. Grossner, S.M. Nida, A. Tsibizov, T. Ziemann
ETH, Zurich, Switzerland

In this work, we present extensive theoretical and experimental results of novel Silicon Carbide x-ray sensors for beam position monitoring (XBPM). Until recently, diamond, was considered the material-of-choice for continuous monitoring of hard (>6keV) x-ray beams at synchrotron light sources. Diamond XBPM are now commercially available as single crystal* and polycrystalline** sensors. However, in a recently published paper***, we have shown that Silicon Carbide is superior to both diamond crystal types in several critical aspects. Specifically, we found superior electrical characteristics (sensor dynamics, signal uniformity, signal strength) and superior optical properties (full device transparency, device active area, signal strength) when compared to commercial polycrystalline and single crystal diamond, respectively. We also succeeded in the ¿industrialization¿ of the SiC fabrication process, allowing for the simultaneous realization of several (>40) sensors in up to 4¿ SiC wafers, with high yields. More recently we have also analyzed the fluorescence of SiC sensors as compared to YAG ones, finding that SiC can also be used for hybrid position/shape monitoring schema.
* CIVIDEC. AT, SYDORTECHNOLOGIES. COM
** DECTRIS. COM
*** S. Nida, et. al. Silicon carbide X-ray beam position monitors for synchrotron applications J. Synchrotron Rad. 26, 28-35 (2019)

Slides THAO02 [9.963 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-THAO02

About •

paper received ※ 11 September 2019 paper accepted ※ 11 September 2019 issue date ※ 10 November 2019

Export •

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