HB2016 - List of Keywords (experiment)

Paper	Title	Other Keywords	Page
MOPR001	Figure-8 Storage Ring – Investigation of the Scaled Down Injection System	injection, detector, simulation, kicker	41
	H. Niebuhr, A. Ates, M. Droba, O. Meusel, D. Noll, U. Ratzinger, J.F. Wagner IAP, Frankfurt am Main, Germany
	To store high current ion beams up to 10 A, a superconducting storage ring (F8SR) is planned at Frankfurt university. For the realisation, a scaled down experimental setup with normalconducting magnets is being build. Investigations of beam transport in solenoidal and toroidal guiding fields are in progress. At the moment, a new kind of injection system consisting of a solenoidal injection coil and a special vacuum vessel is under development. It is used to inject a hydrogen beam sideways between two toroidal magnets. In parallel operation, a second hydrogen beam is transported through both magnets to represent the circulating beam. In a second stage, an ExB-Kicker will be used as a septum to combine both beams into one. The current status of the experimental setup will be shown. For the design of the experiments, computer simulations using the 3D simulation code bender were performed. Different input parameters were checked to find the optimal injection and transport channel for the experiment. The results will be presented.
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MOPR007	Cold and High Power Test of Large Size Magnetic Alloy Core for XiPAF's Synchrotron	impedance, cavity, synchrotron, proton	59
	G.R. Li, X. Guan, W.-H. Huang, X.W. Wang, Z. Yang, H.J. Yao, H.J. Zeng, S.X. Zheng TUB, Beijing, People's Republic of China
	A compact magnetic alloy (MA) loaded cavity is under development for XiPAF's synchrotron. The cavity contains 6 large size MA cores, each is independently coupled with solid state power amplifier. Two types of MA core are proposed for the project. We have developed a single core model cavity to verify the impedance model and to test the properties of MA cores under high power state. The high power test results are presented and discussed.
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TUPM7X01	An Experimental Plan for 400 MeV H⁻ Stripping to Proton by Using Only Lasers in the J-PARC RCS	laser, proton, injection, operation	310
	P.K. Saha, H. Harada, S. Kato, M. Kinsho JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan Y. Irie, I. Yamane KEK, Ibaraki, Japan
	The 3-GeV RCS (Rapid Cycling Synchrotron) of J-PARC is gradually approaching to the design operation with 1 MW beam power. Studies are ongoing for further higher beam power of 1.5 MW. The injection and extraction energy of RCS is 0.4 and 3 GeV, respectively. Lifetime of the stripper foil is the highest concern beyond 1 MW beam power. We have also already started detail studies of H⁻ stripping to protons by using lasers. However, in order to avoid high magnetic field required in the process of laser-assisted H⁻ stripping to protons, especially for lower H⁻ energies, we are studying the possibilities of using only laser system for 400 MeV H⁻ beam in the RCS. The method is a three step process, similar to that of SNS but lasers are used instead of high field magnets in the 1st (H⁻ to H⁰) and 3rd step (H0* to p). A Nd:YAG laser can be properly used for both 1st and 3rd steps, where commercially available powerful Excimer laser will be used an H⁰ excitation in the 2nd step. Although detail R&D studies are necessary to reach to the ultimate goal, we plan to carry out an experiment in 2017. A detail of the present method, experimental schedule and the expected outcome will be presented.
	Slides TUPM7X01 [3.316 MB]
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TUPM9Y01	Observations of Coupling During Accumulation Using a Non-Destructive Electron Scanner in the Spallation Neutron Source Accumulator Ring	electron, coupling, accumulation, quadrupole	351
	R.E. Potts ORNL RAD, Oak Ridge, Tennessee, USA W. Blokland, S.M. Cousineau, J.A. Holmes ORNL, Oak Ridge, Tennessee, USA
	An electron scanner has been installed in the accumulator ring of the Spallation Neutron Source (SNS). The non-destructive device permits turn-by-turn measurements of the horizontal and vertical profiles of the proton beam during accumulation with fine longitudinal resolution. In this study the device is used to identify the source of transverse coupling in the SNS ring and to understand the impact of space charge on the evolution of the coupled beam. We present experimental observations of coupling dependent on tune, injected intensity, and accumulated intensity for a simplified accumulation scenario with no RF and no injection painting. We also investigate the effects of varying the skew quadrupoles and tune for beams with the SNS production-style ring injection and ring RF patterns.
	Slides TUPM9Y01 [3.849 MB]
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WEAM1X01	Code Bench-Marking for Long-Term Tracking and Adaptive Algorithms	emittance, space-charge, simulation, resonance	357
	F. Schmidt, H. Bartosik, A. Huschauer, A. Oeftiger, M. Titze CERN, Geneva, Switzerland Y.I. Alexahin, J.F. Amundson, V.V. Kapin, E.G. Stern Fermilab, Batavia, Illinois, USA G. Franchetti GSI, Darmstadt, Germany J.A. Holmes ORNL, Oak Ridge, Tennessee, USA
	At CERN we have ramped up a program to investigate space charge effects in the LHC pre-injectors with high brightness beams and long storage times. This in view of the LIU upgrade project for these accelerators. These studies require massive simulation over large number of turns. To this end we have been looking at all available codes and started collaborations on code development with several laboratories: pyORBIT from SNS, SYNERGIA from Fermilab, MICROMAP from GSI and our in-house MAD-X code with an space charge upgrade. We have agreed with our collaborators to bench-mark all these codes in the framework of the GSI bench-marking suite, in particular the main types of frozen space charge and PIC codes are being tested. We also include a study on the subclass of purely frozen and the adaptive frozen modes both part of MAD-X in comparison with the purely frozen MICROMAP code. Last, we will report on CERN's code development effort to understand and eventually overcome the noise issue in PIC codes. J. Coupard et al., ‘‘LHC Injectors Upgrade, Technical Design Report, Vol. I: Protons'', LIU Technical Design Report (TDR), CERN-ACC-2014-0337.
	Slides WEAM1X01 [2.348 MB]
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WEPM6Y01	Study on Space Charge Compensation of Low Energy High Intensity Ion Beam in Peking University	space-charge, ion, simulation, ion-source	453
	S.X. Peng, J.E. Chen, Z.Y. Guo, H.T. Ren, J.M. Wen, W.B. Wu, Y. Xu, A.L. Zhang, J.F. Zhang, T. Zhang PKU, Beijing, People's Republic of China J.E. Chen Graduate University, Chinese Academy of Sciences, Beijing, People's Republic of China H.T. Ren FRIB, East Lansing, Michigan, USA A.L. Zhang University of Chinese Academy of Sciences, Beijing, People's Republic of China
	To better understand the space charge compensation processes in low energy high intensity beam transportation, numerical study and experimental simulation on H⁺ beam and H⁻ beam were carried out at Peking University (PKU). The numerical simulation is done with a PIC-MCC model [1] whose computing framework was done with the 3D MATLAB PIC code bender [2], and the impacts among particles were done with Monte Carlo collision via null-collision method [3]. Issues, such as beam loss caused by collisions in H⁺, H⁻ beam and ion-electron instability related to decompensation and overcompensation in H⁻ beam, are carefully treated in this model. The experiments were performed on PKU ion source test bench. Compensation gases were injected directly into the beam transportation region to modify the space charge compensation degree. The results obtained during the experiment are agree well with the numerical simulation ones for both H⁺ beam [1] and H⁻ beam [4]. Details will be presented in this paper.
	Slides WEPM6Y01 [5.625 MB]
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THPM5X01	Using an Electron Cooler for Space Charge Compensation in the GSI Synchrotron SIS18	electron, ion, space-charge, focusing	496
	W.D. Stem, O. Boine-Frankenheim TEMF, TU Darmstadt, Darmstadt, Germany O. Boine-Frankenheim GSI, Darmstadt, Germany
	Funding: Work is supported by BMBF contract FKZ:05P15RDRBA For the future operation of the SIS18 as a booster synchrotron for the FAIR SIS100, space charge and beam lifetime are expected to be the main intensity limitations. Intensity is limited in part by the space-charge-induced incoherent tune shift in bunched beams. A co-propagating, low energy electron lens can compensate for this tune shift by applying opposing space-charge fields in the ion beam. In this paper, we study the effect of using the existing electron cooler at the SIS18 as a space charge compensation device. We anticipate beta beating may arise due to the singular localized focusing error, and explore the possibility of adding additional lenses to reduce this error. We also study the effect of electron lenses on the coherent (collective) and incoherent (single-particle) stopbands. Furthermore, we estimate the lifetime of partially stripped heavy-ions due to charge exchange process in the lens.
	Slides THPM5X01 [4.731 MB]
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THAM2Y01	Measurements of Beam Pulse Induced Mechanical Strain Inside the SNS* Target Module	target, radiation, simulation, proton	532
	W. Blokland, Y. Liu, B.W. Riemer, M. Wendel, D.E. Winder ORNL, Oak Ridge, Tennessee, USA M.J. Dayton ORNL RAD, Oak Ridge, Tennessee, USA
	Funding: * ORNL is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy. Because several of the SNS targets have had a shorter lifetime than desired, a new target has been instrumented with strain sensors to further our understanding of the proton beam’s mechanical impact. The high radiation and electrically noisy environment led us to pick multi-mode fiber optical strain sensors over other types of strain sensors. Special care was taken to minimize the impact of the sensors on the target’s lifetime. We also placed accelerometers outside the target to try correlating the outside measurements with the internal measurements. Remote manipulators performed the final part of the installation, as even residual radiation is too high for humans to come close to the target’s final location. The initial set of optical sensors on the first instrumented target lasted just long enough to give us measurements from different proton beam intensities. A second set of more rad-hard sensors, installed in the following target, lasted much longer, to give us considerably more data. We are developing our own rad-hard, single-mode fiber optic sensors. This paper describes the design, installation, data-acquisition system, the results of the strain sensors, and future plans.
	Slides THAM2Y01 [13.157 MB]
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FRAM2P01	Summary WG-A	space-charge, resonance, electron, simulation	575
	W. Fischer BNL, Upton, Long Island, New York, USA Y.H. Chin KEK, Ibaraki, Japan G. Franchetti GSI, Darmstadt, Germany
	Friday Summary
	Slides FRAM2P01 [6.325 MB]
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Paper

Title

Other Keywords

Page

MOPR001

Figure-8 Storage Ring – Investigation of the Scaled Down Injection System

injection, detector, simulation, kicker

41

H. Niebuhr, A. Ates, M. Droba, O. Meusel, D. Noll, U. Ratzinger, J.F. Wagner
IAP, Frankfurt am Main, Germany

To store high current ion beams up to 10 A, a superconducting storage ring (F8SR) is planned at Frankfurt university. For the realisation, a scaled down experimental setup with normalconducting magnets is being build. Investigations of beam transport in solenoidal and toroidal guiding fields are in progress. At the moment, a new kind of injection system consisting of a solenoidal injection coil and a special vacuum vessel is under development. It is used to inject a hydrogen beam sideways between two toroidal magnets. In parallel operation, a second hydrogen beam is transported through both magnets to represent the circulating beam. In a second stage, an ExB-Kicker will be used as a septum to combine both beams into one. The current status of the experimental setup will be shown. For the design of the experiments, computer simulations using the 3D simulation code bender were performed. Different input parameters were checked to find the optimal injection and transport channel for the experiment. The results will be presented.

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MOPR007

Cold and High Power Test of Large Size Magnetic Alloy Core for XiPAF's Synchrotron

impedance, cavity, synchrotron, proton

59

G.R. Li, X. Guan, W.-H. Huang, X.W. Wang, Z. Yang, H.J. Yao, H.J. Zeng, S.X. Zheng
TUB, Beijing, People's Republic of China

A compact magnetic alloy (MA) loaded cavity is under development for XiPAF's synchrotron. The cavity contains 6 large size MA cores, each is independently coupled with solid state power amplifier. Two types of MA core are proposed for the project. We have developed a single core model cavity to verify the impedance model and to test the properties of MA cores under high power state. The high power test results are presented and discussed.

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TUPM7X01

An Experimental Plan for 400 MeV H⁻ Stripping to Proton by Using Only Lasers in the J-PARC RCS

laser, proton, injection, operation

310

P.K. Saha, H. Harada, S. Kato, M. Kinsho
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
Y. Irie, I. Yamane
KEK, Ibaraki, Japan

The 3-GeV RCS (Rapid Cycling Synchrotron) of J-PARC is gradually approaching to the design operation with 1 MW beam power. Studies are ongoing for further higher beam power of 1.5 MW. The injection and extraction energy of RCS is 0.4 and 3 GeV, respectively. Lifetime of the stripper foil is the highest concern beyond 1 MW beam power. We have also already started detail studies of H⁻ stripping to protons by using lasers. However, in order to avoid high magnetic field required in the process of laser-assisted H⁻ stripping to protons, especially for lower H⁻ energies, we are studying the possibilities of using only laser system for 400 MeV H⁻ beam in the RCS. The method is a three step process, similar to that of SNS but lasers are used instead of high field magnets in the 1st (H⁻ to H⁰) and 3rd step (H0* to p). A Nd:YAG laser can be properly used for both 1st and 3rd steps, where commercially available powerful Excimer laser will be used an H⁰ excitation in the 2nd step. Although detail R&D studies are necessary to reach to the ultimate goal, we plan to carry out an experiment in 2017. A detail of the present method, experimental schedule and the expected outcome will be presented.

Slides TUPM7X01 [3.316 MB]

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TUPM9Y01

Observations of Coupling During Accumulation Using a Non-Destructive Electron Scanner in the Spallation Neutron Source Accumulator Ring

electron, coupling, accumulation, quadrupole

351

R.E. Potts
ORNL RAD, Oak Ridge, Tennessee, USA
W. Blokland, S.M. Cousineau, J.A. Holmes
ORNL, Oak Ridge, Tennessee, USA

An electron scanner has been installed in the accumulator ring of the Spallation Neutron Source (SNS). The non-destructive device permits turn-by-turn measurements of the horizontal and vertical profiles of the proton beam during accumulation with fine longitudinal resolution. In this study the device is used to identify the source of transverse coupling in the SNS ring and to understand the impact of space charge on the evolution of the coupled beam. We present experimental observations of coupling dependent on tune, injected intensity, and accumulated intensity for a simplified accumulation scenario with no RF and no injection painting. We also investigate the effects of varying the skew quadrupoles and tune for beams with the SNS production-style ring injection and ring RF patterns.

Slides TUPM9Y01 [3.849 MB]

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WEAM1X01

Code Bench-Marking for Long-Term Tracking and Adaptive Algorithms

emittance, space-charge, simulation, resonance

357

F. Schmidt, H. Bartosik, A. Huschauer, A. Oeftiger, M. Titze
CERN, Geneva, Switzerland
Y.I. Alexahin, J.F. Amundson, V.V. Kapin, E.G. Stern
Fermilab, Batavia, Illinois, USA
G. Franchetti
GSI, Darmstadt, Germany
J.A. Holmes
ORNL, Oak Ridge, Tennessee, USA

At CERN we have ramped up a program to investigate space charge effects in the LHC pre-injectors with high brightness beams and long storage times. This in view of the LIU upgrade project for these accelerators. These studies require massive simulation over large number of turns. To this end we have been looking at all available codes and started collaborations on code development with several laboratories: pyORBIT from SNS, SYNERGIA from Fermilab, MICROMAP from GSI and our in-house MAD-X code with an space charge upgrade. We have agreed with our collaborators to bench-mark all these codes in the framework of the GSI bench-marking suite, in particular the main types of frozen space charge and PIC codes are being tested. We also include a study on the subclass of purely frozen and the adaptive frozen modes both part of MAD-X in comparison with the purely frozen MICROMAP code. Last, we will report on CERN's code development effort to understand and eventually overcome the noise issue in PIC codes.
J. Coupard et al., ‘‘LHC Injectors Upgrade,
Technical Design Report, Vol. I: Protons'', LIU Technical Design
Report (TDR), CERN-ACC-2014-0337.

Slides WEAM1X01 [2.348 MB]

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WEPM6Y01

Study on Space Charge Compensation of Low Energy High Intensity Ion Beam in Peking University

space-charge, ion, simulation, ion-source

453

S.X. Peng, J.E. Chen, Z.Y. Guo, H.T. Ren, J.M. Wen, W.B. Wu, Y. Xu, A.L. Zhang, J.F. Zhang, T. Zhang
PKU, Beijing, People's Republic of China
J.E. Chen
Graduate University, Chinese Academy of Sciences, Beijing, People's Republic of China
H.T. Ren
FRIB, East Lansing, Michigan, USA
A.L. Zhang
University of Chinese Academy of Sciences, Beijing, People's Republic of China

To better understand the space charge compensation processes in low energy high intensity beam transportation, numerical study and experimental simulation on H⁺ beam and H⁻ beam were carried out at Peking University (PKU). The numerical simulation is done with a PIC-MCC model [1] whose computing framework was done with the 3D MATLAB PIC code bender [2], and the impacts among particles were done with Monte Carlo collision via null-collision method [3]. Issues, such as beam loss caused by collisions in H⁺, H⁻ beam and ion-electron instability related to decompensation and overcompensation in H⁻ beam, are carefully treated in this model. The experiments were performed on PKU ion source test bench. Compensation gases were injected directly into the beam transportation region to modify the space charge compensation degree. The results obtained during the experiment are agree well with the numerical simulation ones for both H⁺ beam [1] and H⁻ beam [4]. Details will be presented in this paper.

Slides WEPM6Y01 [5.625 MB]

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THPM5X01

Using an Electron Cooler for Space Charge Compensation in the GSI Synchrotron SIS18

electron, ion, space-charge, focusing

496

W.D. Stem, O. Boine-Frankenheim
TEMF, TU Darmstadt, Darmstadt, Germany
O. Boine-Frankenheim
GSI, Darmstadt, Germany

Funding: Work is supported by BMBF contract FKZ:05P15RDRBA
For the future operation of the SIS18 as a booster synchrotron for the FAIR SIS100, space charge and beam lifetime are expected to be the main intensity limitations. Intensity is limited in part by the space-charge-induced incoherent tune shift in bunched beams. A co-propagating, low energy electron lens can compensate for this tune shift by applying opposing space-charge fields in the ion beam. In this paper, we study the effect of using the existing electron cooler at the SIS18 as a space charge compensation device. We anticipate beta beating may arise due to the singular localized focusing error, and explore the possibility of adding additional lenses to reduce this error. We also study the effect of electron lenses on the coherent (collective) and incoherent (single-particle) stopbands. Furthermore, we estimate the lifetime of partially stripped heavy-ions due to charge exchange process in the lens.

Slides THPM5X01 [4.731 MB]

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THAM2Y01

Measurements of Beam Pulse Induced Mechanical Strain Inside the SNS* Target Module

target, radiation, simulation, proton

532

W. Blokland, Y. Liu, B.W. Riemer, M. Wendel, D.E. Winder
ORNL, Oak Ridge, Tennessee, USA
M.J. Dayton
ORNL RAD, Oak Ridge, Tennessee, USA

Funding: * ORNL is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy.
Because several of the SNS targets have had a shorter lifetime than desired, a new target has been instrumented with strain sensors to further our understanding of the proton beam’s mechanical impact. The high radiation and electrically noisy environment led us to pick multi-mode fiber optical strain sensors over other types of strain sensors. Special care was taken to minimize the impact of the sensors on the target’s lifetime. We also placed accelerometers outside the target to try correlating the outside measurements with the internal measurements. Remote manipulators performed the final part of the installation, as even residual radiation is too high for humans to come close to the target’s final location. The initial set of optical sensors on the first instrumented target lasted just long enough to give us measurements from different proton beam intensities. A second set of more rad-hard sensors, installed in the following target, lasted much longer, to give us considerably more data. We are developing our own rad-hard, single-mode fiber optic sensors. This paper describes the design, installation, data-acquisition system, the results of the strain sensors, and future plans.

Slides THAM2Y01 [13.157 MB]

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FRAM2P01

Summary WG-A

space-charge, resonance, electron, simulation

575

W. Fischer
BNL, Upton, Long Island, New York, USA
Y.H. Chin
KEK, Ibaraki, Japan
G. Franchetti
GSI, Darmstadt, Germany

Friday Summary

Slides FRAM2P01 [6.325 MB]

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