IBIC2019 - List of Keywords (MMI)

Paper	Title	Other Keywords	Page
MOBO01	Overview of the Beam Instrumentation and Commissioning Results from the BNL Low Energy RHIC Electron Cooling Facility	electron, gun, cathode, laser	14
	T.A. Miller, Z. Altinbas, D. Bruno, J.C. Brutus, M.R. Costanzo, L. DeSanto, C.M. Degen, K.A. Drees, A.V. Fedotov, W. Fischer, J.M. Fite, D.M. Gassner, X. Gu, J. Hock, R.L. Hulsart, P. Inacker, J.P. Jamilkowski, D. Kayran, J. Kewisch, C. Liu, K. Mernick, R.J. Michnoff, M.G. Minty, S.K. Nayak, L.K. Nguyen, P. Oddo, R.H. Olsen, M.C. Paniccia, W.E. Pekrul, I. Pinayev, V. Ptitsyn, V. Schoefer, S. Seletskiy, H. Song, A. Sukhanov, P. Thieberger, J.E. Tuozzolo, D. Weiss BNL, Upton, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Con-tract No. DE-AC02-98CH10886 with the U.S. Department of Energy The Low Energy RHIC Electron Cooling (LEReC) facility at BNL demonstrated, for the first time, cooling of ion beams using a bunched electron beam from an SRF accelerating cavity and photoinjector. LEReC is planned to be operational to improve the luminosity of the Beam Energy Scan II physics program in RHIC in the following two years. In order to establish cooling of the RHIC Au ion beam using a 20 mA, 1.6 MeV bunched electron beam; absolute energy, angular and energy spread, trajectory and beam size were precisely matched. A suite of instrumentation was commissioned that includes a variety of current transformers, capacitive pick-up for gun high voltage ripple monitor, BPMs, transverse and longitudinal profile monitors, multi-slit and single-slit scanning emittance stations, time-of-flight and magnetic field related energy measurements, beam halo & loss monitors and recombination monitors. The commissioning results and performance of these systems are described, including the latest design efforts of high-power electron beam transverse profile monitoring using a fast wire scanner, residual gas beam induced fluorescence monitor, and Boron Nitride NanoTube (BNNT) screen monitor
	Slides MOBO01 [17.119 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOBO01
About •	paper received ※ 05 September 2019 paper accepted ※ 11 September 2019 issue date ※ 10 November 2019
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MOBO02	Beam Instrumentation at the Fermilab IOTA Ring	electron, proton, controls, experiment	22
	N. Eddy, D.R. Broemmelsiek, K. Carlson, D.J. Crawford, J.S. Diamond, D.R. Edstrom, B.J. Fellenz, M.A. Ibrahim, J.D. Jarvis, V.A. Lebedev, S. Nagaitsev, J. Ruan, J.K. Santucci, A. Semenov, V.D. Shiltsev, G. Stancari, A. Valishev, D.C. Voy, A. Warner Fermilab, Batavia, Illinois, USA N. Kuklev, I. Lobach University of Chicago, Chicago, Illinois, USA S. Szustkowski Northern Illinois University, DeKalb, Illinois, USA
	Funding: This manuscript has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics. The Integrable Optics Test Accelerator (IOTA) is a storage ring at the end of the Fermilab Accelerator Science and Technology (FAST) facility. The complex is intended to support accelerator R&D for the next generation of particle accelerators. The IOTA ring is currently operating with 150 MeV electrons injected from the FAST Linac and will also receive 2.5 MeV protons from the IOTA Proon Injector currently be installed. The current instrumentation and results along from the first electron commissioning run will be presented along with future plans.
	Slides MOBO02 [47.588 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOBO02
About •	paper received ※ 09 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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MOPP015	Charge Detection System for the CLARA/VELA Facility	simulation, experiment, feedback, controls	111
	S.L. Mathisen, Y.M. Saveliev, R.J. Smith STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
	The CLARA/VELA facility at Daresbury Laboratory combines an FEL test facility and an electron accelerator for scientific and industrial applications, capable of providing up to 40 MeV electrons, with an eventual goal of 250 MeV. Accurate measurement of the bunch charges in a wide range (1 - 250 pC) at a repetition rate up to 400 Hz is required. We present a new system of analogue electronics developed to interface with existing and future bunch charge measurement devices (wall current monitors, faraday cups, etc.) to measure the bunch charges accurately and precisely. The system is based on a charge amplifier with switchable sensitivity, dark current gating and on-board self-calibration. Results of circuit simulations, offline calibration tests and online beam tests of a prototype system are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP015
About •	paper received ※ 04 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019
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TUAO04	Commissioning of the ARIEL E-LINAC Beam Loss Monitor System	electron, dipole, linac, target	238
	M. Alcorta, A.D. D’Angelo, D. Dale, H. Hui, B. Humphries, S.R. Koscielniak, K. Langton, A. Lennarz, R.B. Nussbaumer, T. Planche, M. Rowe, S.D. Rädel TRIUMF, Vancouver, Canada
	The commissioning of the Advanced Rare Isotope & Electron Linac (ARIEL) facility at TRIUMF is underway. The 30 MeV e-linac has successfully been commissioned to 100 W, and to further increase the power to 1 kW the beam loss monitor system (BLM) for fast Machine Protection must be fully operational. There are currently two types of BLMs employed in the e-linac; long-ionization chambers (LIC) and scintillators, consisting of a small BGO coupled to a PMT. A front-end beam loss monitor board was designed at TRIUMF to meet the strict requirements of the BLMs: a trip of the beam occurs on 100 nC in 100 ms of integrated beam loss, and the trip must occur in < 10 us. This contribution will report on the status of the 1 kW BLM system commissioning and will give an outlook as the power is increased to the full 300 kW.
	Slides TUAO04 [14.621 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUAO04
About •	paper received ※ 04 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019
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TUPP006	Transverse Emittance Measurement of a 2.5 MeV Proton Beam on LIPAc, IFMIF’s Prototype	emittance, electron, proton, rfq	288
	J. Marroncle, P. Abbon, B. Bolzon, T. Chaminade, N. Chauvin, S. Chel, J.F. Denis, A. Gaget CEA-DRF-IRFU, France T. Akagi, K. Kondo, M. Sugimoto QST, Aomori, Japan L. Bellan, M. Comunian, E. Fagotti, F. Grespan, A. Pisent, F. Scantamburlo INFN/LNL, Legnaro (PD), Italy P. Cara IFMIF/EVEDA, Rokkasho, Japan H. Dzitko, D. Gex, A. Jokinen F4E, Germany J.M. García, D. Jiménez-Rey, A. Ros, V. Villamayor CIEMAT, Madrid, Spain A. Rodríguez Páramo ESS Bilbao, Zamudio, Spain
	IFMIF (International Fusion Materials Irradiation Fa-cility) is an accelerator-driven neutron source aiming at testing fusion reactor materials. Under the Broader Ap-proach Agreement, a 125 mA / 9 MeV CW deuteron accelerator called LIPAc (Linear IFMIF Prototype Accel-erator) is currently under installation and commissioning at Rokkasho, Japan, to validate the IFMIF accelerator. During the beam commissioning at 5 MeV which started in June 2018, the horizontal and vertical transverse emit-tance of a 2.5 MeV proton beam have been measured downstream of the RFQ for different machine configura-tions. Such measurements were done with an emittance measurement unit composed of slits defining a beamlet of 200 µm width, then of steerers and finally of a SEM grids monitor. In this paper, the process and the system are first described. The secondary electron emission of SEM-Grid wires is then estimated based on measure-ments and results are close to the usual rule of thumb. Finally, emittance measurements are presented and comparisons with beam dynamics simulations show good agreement.
	Poster TUPP006 [1.974 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP006
About •	paper received ※ 02 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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TUPP017	Thermal Performance of Diamond SR Extraction Mirrors for SuperKEKB	extraction, radiation, optics, electron	332
	J.W. Flanagan, M. Arinaga, H. Fukuma, H. Ikeda, G. Mitsuka, Y. Suetsugu KEK, Ibaraki, Japan E. Mulyani BATAN, Yogyakarta, Indonesia E. Mulyani Sokendai, Ibaraki, Japan
	The SuperKEKB accelerator is a high-current, low-emittance upgrade to the KEKB double ring collider. The beryllium extraction mirrors used for the synchrotron radiation (SR) monitors at KEKB suffered from heat distortion due to incident SR, leading to systematic changes in magnification with beam current, and necessitating continuous monitoring and compensation of such distortions in order to correctly measure the beam sizes.* To minimize such mirror distortions, quasi-monocrystalline CVD diamond mirrors have been designed and installed at SuperKEKB.** Diamond has a very high heat conductance and a low thermal expansion coefficient. With such mirrors it is hoped to reduce the beam current-dependent magnification to the level of a few percent at SuperKEKB. Preliminary measurements of mirror distortion during SuperKEKB commissioning show very promising results with regard to thermal performance, though full beam currents have not yet been stored in the SuperKEKB rings. Measurements of the thermal deformation of the diamond mirrors will be presented in this paper, along with a description of the design of the mirrors and their mounts, and issues encountered during commissioning. M. Arinaga et al., NIM, A499, p. 100 (2003). *J.W. Flanagan et al., "Diamond mirrors for the SuperKEKB synchrotron radiation monitors," Proc. IBIC2012, Tsukuba, Japan p. 515 (2012).
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP017
About •	paper received ※ 09 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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TUPP018	Synchrotron Radiation Monitor for SuperKEKB Damping Ring in Phase-III Operation	damping, operation, injection, positron	336
	H. Ikeda, J.W. Flanagan, H. Fukuma, H. Sugimoto, M. Tobiyama KEK, Ibaraki, Japan
	The SuperKEKB damping ring (DR) commissioned in March 2019, before main ring (MR) Phase-III operation. The design luminosity of SuperKEKB is 40 times that of KEKB with high current and low emittance. We constructed the DR in order to deliver a low-emittance positron beam. A synchrotron radiation monitor (SRM) was installed for beam diagnostics at the DR. Streak camera and gated camera were used for measurement of the damping time and the beam size. This paper shows the design of DR SRM and the result of the measurement.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP018
About •	paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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WECO04	Commissioning of the Non-invasive Profile Monitors for the ESS LEBT	LEBT, emittance, alignment, solenoid	495
	C.A. Thomas, J. Etxeberria, S. Haghtalab, H. Kocevar, N. Milas, R. Miyamoto, T.J. Shea, R. Tarkeshian ESS, Lund, Sweden
	In the Low Energy Beam Transport (LEBT) of the European Spallation Source (ESS) Linac, a specific Non-invasive Profile Monitor (NPM) has been designed to primarily monitor beam position monitor with 100 µm accuracy, and in addition enable beam profile and size measurement. We present the first measurement results using NPM during the commissioning of the LEBT. The measurement results conclude the beam position as well as the angle of the beam. The performance of the measurement is discussed and compared to the required accuracy for the position measurement. In addition, the profile of the beam along the propagation axis is reported, as measured for part or the full pulse transported in the LEBT. The fidelity of the reported profile will be discussed as function of the system sensitivity and image signal to noise ratio.
	Slides WECO04 [11.779 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WECO04
About •	paper received ※ 04 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, pick-up, electronics, 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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WEPP032	Beam Based Alignment of Elements and Source at the ESS Low Energy Beam Transport Line	solenoid, LEBT, simulation, alignment	600
	N. Milas, M. Eshraqi, B. Gålander, Y. Levinsen, R. Miyamoto, E. Nilsson, D.C. Plostinar ESS, Lund, Sweden
	The European Spallation Source (ESS), currently under construction in Lund, Sweden, will be the world’s most powerful linear accelerator driving a neutron spallation source, with an average power of 5 MW at 2.0 GeV. The first protons were accelerated at the ESS site during the commissioning of the ion source and low energy beam transport (LEBT), that started in September 2018 and ran until July 2019. Misalignments of the elements in the LEBT can have a strong impact on the final current transmission of the low energy part. In this paper, we present a way to isolate and measure tilts of the elements and the initial centroid divergence of the source. We also present initial test measurements for the ESS LEBT and discuss how to extend the method to other facilities.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP032
About •	paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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THAO03	ROSE - a Rotating 4D Emittance Scanner	emittance, software, quadrupole, electronics	669
	M.T. Maier, L. Groening, C. Xiao GSI, Darmstadt, Germany A. Bechtold NTG, Gelnhausen, Germany J.M. Maus NTG Neue Technologien GmbH & Co KG, Gelnhausen, Germany
	The detector system ROSE, allowing to perform 4D emittance measurements on heavy ion beams independent of their energy and time structure, has been built and successfully commissioned in 2016 at GSI in Darmstadt, Germany. This method to measure the four dimensional emittance has then been granted a patent in 2017. The inventors together with the technology transfer department of GSI have found an industrial partner to modify ROSE into a fully standalone, mobile emittance scanner system. This is a three step process involving the ROSE hardware, the electronics ROBOMAT and the software working packages. The electronics was commissioned at the ECR test bench of the Heidelberg ion therapy facility HIT in June 2019. Currently our main focus is on the development of the 4D software package ROSOFT. This contribution presents the actual status and introduces the multiple possibilities of this 4D emittance scanner.
	Slides THAO03 [26.411 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-THAO03
About •	paper received ※ 03 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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Paper

Title

Other Keywords

Page

MOBO01

Overview of the Beam Instrumentation and Commissioning Results from the BNL Low Energy RHIC Electron Cooling Facility

electron, gun, cathode, laser

14

T.A. Miller, Z. Altinbas, D. Bruno, J.C. Brutus, M.R. Costanzo, L. DeSanto, C.M. Degen, K.A. Drees, A.V. Fedotov, W. Fischer, J.M. Fite, D.M. Gassner, X. Gu, J. Hock, R.L. Hulsart, P. Inacker, J.P. Jamilkowski, D. Kayran, J. Kewisch, C. Liu, K. Mernick, R.J. Michnoff, M.G. Minty, S.K. Nayak, L.K. Nguyen, P. Oddo, R.H. Olsen, M.C. Paniccia, W.E. Pekrul, I. Pinayev, V. Ptitsyn, V. Schoefer, S. Seletskiy, H. Song, A. Sukhanov, P. Thieberger, J.E. Tuozzolo, D. Weiss
BNL, Upton, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Con-tract No. DE-AC02-98CH10886 with the U.S. Department of Energy
The Low Energy RHIC Electron Cooling (LEReC) facility at BNL demonstrated, for the first time, cooling of ion beams using a bunched electron beam from an SRF accelerating cavity and photoinjector. LEReC is planned to be operational to improve the luminosity of the Beam Energy Scan II physics program in RHIC in the following two years. In order to establish cooling of the RHIC Au ion beam using a 20 mA, 1.6 MeV bunched electron beam; absolute energy, angular and energy spread, trajectory and beam size were precisely matched. A suite of instrumentation was commissioned that includes a variety of current transformers, capacitive pick-up for gun high voltage ripple monitor, BPMs, transverse and longitudinal profile monitors, multi-slit and single-slit scanning emittance stations, time-of-flight and magnetic field related energy measurements, beam halo & loss monitors and recombination monitors. The commissioning results and performance of these systems are described, including the latest design efforts of high-power electron beam transverse profile monitoring using a fast wire scanner, residual gas beam induced fluorescence monitor, and Boron Nitride NanoTube (BNNT) screen monitor

Slides MOBO01 [17.119 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOBO01

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paper received ※ 05 September 2019 paper accepted ※ 11 September 2019 issue date ※ 10 November 2019

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MOBO02

Beam Instrumentation at the Fermilab IOTA Ring

electron, proton, controls, experiment

22

N. Eddy, D.R. Broemmelsiek, K. Carlson, D.J. Crawford, J.S. Diamond, D.R. Edstrom, B.J. Fellenz, M.A. Ibrahim, J.D. Jarvis, V.A. Lebedev, S. Nagaitsev, J. Ruan, J.K. Santucci, A. Semenov, V.D. Shiltsev, G. Stancari, A. Valishev, D.C. Voy, A. Warner
Fermilab, Batavia, Illinois, USA
N. Kuklev, I. Lobach
University of Chicago, Chicago, Illinois, USA
S. Szustkowski
Northern Illinois University, DeKalb, Illinois, USA

Funding: This manuscript has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics.
The Integrable Optics Test Accelerator (IOTA) is a storage ring at the end of the Fermilab Accelerator Science and Technology (FAST) facility. The complex is intended to support accelerator R&D for the next generation of particle accelerators. The IOTA ring is currently operating with 150 MeV electrons injected from the FAST Linac and will also receive 2.5 MeV protons from the IOTA Proon Injector currently be installed. The current instrumentation and results along from the first electron commissioning run will be presented along with future plans.

Slides MOBO02 [47.588 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOBO02

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

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MOPP015

Charge Detection System for the CLARA/VELA Facility

simulation, experiment, feedback, controls

111

S.L. Mathisen, Y.M. Saveliev, R.J. Smith
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom

The CLARA/VELA facility at Daresbury Laboratory combines an FEL test facility and an electron accelerator for scientific and industrial applications, capable of providing up to 40 MeV electrons, with an eventual goal of 250 MeV. Accurate measurement of the bunch charges in a wide range (1 - 250 pC) at a repetition rate up to 400 Hz is required. We present a new system of analogue electronics developed to interface with existing and future bunch charge measurement devices (wall current monitors, faraday cups, etc.) to measure the bunch charges accurately and precisely. The system is based on a charge amplifier with switchable sensitivity, dark current gating and on-board self-calibration. Results of circuit simulations, offline calibration tests and online beam tests of a prototype system are presented.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP015

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

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TUAO04

Commissioning of the ARIEL E-LINAC Beam Loss Monitor System

electron, dipole, linac, target

238

M. Alcorta, A.D. D’Angelo, D. Dale, H. Hui, B. Humphries, S.R. Koscielniak, K. Langton, A. Lennarz, R.B. Nussbaumer, T. Planche, M. Rowe, S.D. Rädel
TRIUMF, Vancouver, Canada

The commissioning of the Advanced Rare Isotope & Electron Linac (ARIEL) facility at TRIUMF is underway. The 30 MeV e-linac has successfully been commissioned to 100 W, and to further increase the power to 1 kW the beam loss monitor system (BLM) for fast Machine Protection must be fully operational. There are currently two types of BLMs employed in the e-linac; long-ionization chambers (LIC) and scintillators, consisting of a small BGO coupled to a PMT. A front-end beam loss monitor board was designed at TRIUMF to meet the strict requirements of the BLMs: a trip of the beam occurs on 100 nC in 100 ms of integrated beam loss, and the trip must occur in < 10 us. This contribution will report on the status of the 1 kW BLM system commissioning and will give an outlook as the power is increased to the full 300 kW.

Slides TUAO04 [14.621 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUAO04

About •

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

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TUPP006

Transverse Emittance Measurement of a 2.5 MeV Proton Beam on LIPAc, IFMIF’s Prototype

emittance, electron, proton, rfq

288

J. Marroncle, P. Abbon, B. Bolzon, T. Chaminade, N. Chauvin, S. Chel, J.F. Denis, A. Gaget
CEA-DRF-IRFU, France
T. Akagi, K. Kondo, M. Sugimoto
QST, Aomori, Japan
L. Bellan, M. Comunian, E. Fagotti, F. Grespan, A. Pisent, F. Scantamburlo
INFN/LNL, Legnaro (PD), Italy
P. Cara
IFMIF/EVEDA, Rokkasho, Japan
H. Dzitko, D. Gex, A. Jokinen
F4E, Germany
J.M. García, D. Jiménez-Rey, A. Ros, V. Villamayor
CIEMAT, Madrid, Spain
A. Rodríguez Páramo
ESS Bilbao, Zamudio, Spain

IFMIF (International Fusion Materials Irradiation Fa-cility) is an accelerator-driven neutron source aiming at testing fusion reactor materials. Under the Broader Ap-proach Agreement, a 125 mA / 9 MeV CW deuteron accelerator called LIPAc (Linear IFMIF Prototype Accel-erator) is currently under installation and commissioning at Rokkasho, Japan, to validate the IFMIF accelerator. During the beam commissioning at 5 MeV which started in June 2018, the horizontal and vertical transverse emit-tance of a 2.5 MeV proton beam have been measured downstream of the RFQ for different machine configura-tions. Such measurements were done with an emittance measurement unit composed of slits defining a beamlet of 200 µm width, then of steerers and finally of a SEM grids monitor. In this paper, the process and the system are first described. The secondary electron emission of SEM-Grid wires is then estimated based on measure-ments and results are close to the usual rule of thumb. Finally, emittance measurements are presented and comparisons with beam dynamics simulations show good agreement.

Poster TUPP006 [1.974 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP006

About •

paper received ※ 02 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

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TUPP017

Thermal Performance of Diamond SR Extraction Mirrors for SuperKEKB

extraction, radiation, optics, electron

332

J.W. Flanagan, M. Arinaga, H. Fukuma, H. Ikeda, G. Mitsuka, Y. Suetsugu
KEK, Ibaraki, Japan
E. Mulyani
BATAN, Yogyakarta, Indonesia
E. Mulyani
Sokendai, Ibaraki, Japan

The SuperKEKB accelerator is a high-current, low-emittance upgrade to the KEKB double ring collider. The beryllium extraction mirrors used for the synchrotron radiation (SR) monitors at KEKB suffered from heat distortion due to incident SR, leading to systematic changes in magnification with beam current, and necessitating continuous monitoring and compensation of such distortions in order to correctly measure the beam sizes.* To minimize such mirror distortions, quasi-monocrystalline CVD diamond mirrors have been designed and installed at SuperKEKB.** Diamond has a very high heat conductance and a low thermal expansion coefficient. With such mirrors it is hoped to reduce the beam current-dependent magnification to the level of a few percent at SuperKEKB. Preliminary measurements of mirror distortion during SuperKEKB commissioning show very promising results with regard to thermal performance, though full beam currents have not yet been stored in the SuperKEKB rings. Measurements of the thermal deformation of the diamond mirrors will be presented in this paper, along with a description of the design of the mirrors and their mounts, and issues encountered during commissioning.
*M. Arinaga et al., NIM, A499, p. 100 (2003).
**J.W. Flanagan et al., "Diamond mirrors for the SuperKEKB synchrotron radiation monitors," Proc. IBIC2012, Tsukuba, Japan p. 515 (2012).

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP017

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

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TUPP018

Synchrotron Radiation Monitor for SuperKEKB Damping Ring in Phase-III Operation

damping, operation, injection, positron

336

H. Ikeda, J.W. Flanagan, H. Fukuma, H. Sugimoto, M. Tobiyama
KEK, Ibaraki, Japan

The SuperKEKB damping ring (DR) commissioned in March 2019, before main ring (MR) Phase-III operation. The design luminosity of SuperKEKB is 40 times that of KEKB with high current and low emittance. We constructed the DR in order to deliver a low-emittance positron beam. A synchrotron radiation monitor (SRM) was installed for beam diagnostics at the DR. Streak camera and gated camera were used for measurement of the damping time and the beam size. This paper shows the design of DR SRM and the result of the measurement.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP018

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

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WECO04

Commissioning of the Non-invasive Profile Monitors for the ESS LEBT

LEBT, emittance, alignment, solenoid

495

C.A. Thomas, J. Etxeberria, S. Haghtalab, H. Kocevar, N. Milas, R. Miyamoto, T.J. Shea, R. Tarkeshian
ESS, Lund, Sweden

In the Low Energy Beam Transport (LEBT) of the European Spallation Source (ESS) Linac, a specific Non-invasive Profile Monitor (NPM) has been designed to primarily monitor beam position monitor with 100 µm accuracy, and in addition enable beam profile and size measurement. We present the first measurement results using NPM during the commissioning of the LEBT. The measurement results conclude the beam position as well as the angle of the beam. The performance of the measurement is discussed and compared to the required accuracy for the position measurement. In addition, the profile of the beam along the propagation axis is reported, as measured for part or the full pulse transported in the LEBT. The fidelity of the reported profile will be discussed as function of the system sensitivity and image signal to noise ratio.

Slides WECO04 [11.779 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WECO04

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paper received ※ 04 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, pick-up, electronics, 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.

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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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WEPP032

Beam Based Alignment of Elements and Source at the ESS Low Energy Beam Transport Line

solenoid, LEBT, simulation, alignment

600

N. Milas, M. Eshraqi, B. Gålander, Y. Levinsen, R. Miyamoto, E. Nilsson, D.C. Plostinar
ESS, Lund, Sweden

The European Spallation Source (ESS), currently under construction in Lund, Sweden, will be the world’s most powerful linear accelerator driving a neutron spallation source, with an average power of 5 MW at 2.0 GeV. The first protons were accelerated at the ESS site during the commissioning of the ion source and low energy beam transport (LEBT), that started in September 2018 and ran until July 2019. Misalignments of the elements in the LEBT can have a strong impact on the final current transmission of the low energy part. In this paper, we present a way to isolate and measure tilts of the elements and the initial centroid divergence of the source. We also present initial test measurements for the ESS LEBT and discuss how to extend the method to other facilities.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP032

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

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THAO03

ROSE - a Rotating 4D Emittance Scanner

emittance, software, quadrupole, electronics

669

M.T. Maier, L. Groening, C. Xiao
GSI, Darmstadt, Germany
A. Bechtold
NTG, Gelnhausen, Germany
J.M. Maus
NTG Neue Technologien GmbH & Co KG, Gelnhausen, Germany

The detector system ROSE, allowing to perform 4D emittance measurements on heavy ion beams independent of their energy and time structure, has been built and successfully commissioned in 2016 at GSI in Darmstadt, Germany. This method to measure the four dimensional emittance has then been granted a patent in 2017. The inventors together with the technology transfer department of GSI have found an industrial partner to modify ROSE into a fully standalone, mobile emittance scanner system. This is a three step process involving the ROSE hardware, the electronics ROBOMAT and the software working packages. The electronics was commissioned at the ECR test bench of the Heidelberg ion therapy facility HIT in June 2019. Currently our main focus is on the development of the 4D software package ROSOFT. This contribution presents the actual status and introduces the multiple possibilities of this 4D emittance scanner.

Slides THAO03 [26.411 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-THAO03

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

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