IBIC2016 - List of Keywords (space-charge)

Paper	Title	Other Keywords	Page
TUPG71	Ionization Profile Monitor Simulations - Status and Future Plans	simulation, electron, ion, detector	520
	M. Sapinski, P. Forck, T. Giacomini, R. Singh, S. Udrea, D.M. Vilsmeier GSI, Darmstadt, Germany F. Belloni, J. Marroncle CEA/IRFU, Gif-sur-Yvette, France B. Dehning, J.W. Storey CERN, Geneva, Switzerland K. Satou J-PARC, KEK & JAEA, Ibaraki-ken, Japan C.A. Thomas ESS, Lund, Sweden R.M. Thurman-Keup Fermilab, Batavia, Illinois, USA C.C. Wilcox, R.E. Williamson STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
	Nonuniformities of the extraction fields, the velocity distribution of electrons from ionization processes and strong bunch fields are just a few of the effects affecting Ionization Profile Monitor measurements and operation. Careful analysis of these phenomena require specialized simulation programs. A handful of such codes has been written independently by various researchers over the recent years, showing an important demand for this type of study. In this paper we describe the available codes and discuss various approaches to Ionization Profile Monitor simulations. We propose benchmark conditions to compare these codes between themselves and we collect data from various devices to benchmark codes against the measurements. Finally we present a community effort with a goal to discuss the codes, exchange simulation results and to develop and maintain a new, common codebase.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG71
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TUPG81	Space Charge Studies for the Ionisation Profile Monitors for the ESS Cold Linac	proton, electron, simulation, linac	555
	C.A. Thomas ESS, Lund, Sweden F. Belloni, J. Marroncle CEA/IRFU, Gif-sur-Yvette, France
	In this paper, we present the results from a numerical code developed to study the effect of space charge on the performance of Ionisation Profile Monitors. The code has been developed from the analytical expression of the electromagnetic field generated by a 3D bunch of charged particles moving along one axis. This transient field is evaluated to calculate the momentum gained by a test moving particle, but not necessary co-moving with the bunch, and included in a non-linear ordinary differential equation solver (Runge-Kutta) to track the 3D motion of the test particle. The model of the IPM is complete when an additional constant electric field is included to project the test particle onto a screen. The results from this code, modelling the IPM to be developed for the ESS Cold Linac, are presented here, and the impact of the space charge on the measurement of the beam profile is discussed.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG81
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WEAL01	Longitudinal Diagnostics Methods and Limits for Hadron Linacs	linac, cavity, diagnostics, simulation	563
	A.P. Shishlo, A.V. Aleksandrov ORNL, Oak Ridge, Tennessee, USA
	Funding: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC0500OR22725 with the U.S. Department of Energy. The United States Govern-ment retains and the publisher, A summary of the longitudinal diagnostics for linacs is presented based on the Spallation Neutron Source (SNS) linac example. It includes acceptance phase scans, Bunch Shape Monitors (BSM), and a method based on the analysis of the stripline Beam Position Monitors (BPM) signals. The last method can deliver the longitudinal Twiss parameters of the beam. The accuracy, applicability, and limitations of this method are presented and discussed.
	Slides WEAL01 [2.256 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEAL01
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WEPG47	Progress on the PITZ TDS	emittance, electron, laser, simulation	744
	H. Huck, P. Boonpornprasert, L. Jachmann, W. Köhler, M. Krasilnikov, A. Oppelt, F. Stephan DESY Zeuthen, Zeuthen, Germany L.V. Kravchuk, V.V. Paramonov, A.A. Zavadtsev RAS/INR, Moscow, Russia C. Saisa-ard Chiang Mai University, Chiang Mai, Thailand
	A transverse deflecting system (TDS) is under commissioning at the Photo Injector Test Facility at DESY, Zeuthen site (PITZ). The structure was designed and manufactured by the Institute for Nuclear Research (INR RAS, Moscow, Russia) as prototype for the TDS in the injector part of the European XFEL. Last year the deflection voltage was limited for safety reasons, but after thorough investigations of the waveguide system we are now able to operate the cavity close to design specifications. The PITZ TDS streaks the electron beam vertically, allowing measurements of the longitudinal bunch profile, and, in combination with a subsequent horizontal bending magnet, also of the longitudinal phase space and slice energy spread. Furthermore, several quadrupole magnets and screen stations can be employed for slice emittance measurements using the TDS. This paper describes the progress in commissioning of the hardware, measurement techniques and simulations, and outlines the prospects of reliable slice emittance measurements at 20 MeV/c, where space charge forces complicate the determination of transfer matrices.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG47
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WEPG66	Beam Induced Fluorescence Monitor R&D for the J-PARC Neutrino Beamline	proton, radiation, injection, vacuum	799
	M.L. Friend KEK, Ibaraki, Japan C. Bronner, M. Hartz Kavli IPMU, Kashiwa, Japan
	Proton beam monitoring is essential for the J-PARC neutrino beamline, where neutrinos are produced by the collision of 30 GeV protons with a long carbon target. Along with continued upgrades to the J-PARC beam power, from the current 420 kW to 1.3+ MW, there is also a requirement for monitor upgrades. A Beam Induced Fluorescence monitor is under development, which would continuously and non-destructively measure the proton beam profile spill-by-spill by measuring fluorescence light from proton interactions with gas injected into the beamline. Monitor design is constrained by the J-PARC neutrino beamline configuration, where a major challenge will be getting sufficient signal to precisely reconstruct the proton beam profile. R&D for a pulsed gas injection system is under way, where injected gas uniformity and vacuum pump lifetime are main concerns. Design of a light detection system is also under way, where light transport away from the high radiation environment near the proton beamline, as well as fast detection down to very low light levels, are essential.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG66
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUPG71

Ionization Profile Monitor Simulations - Status and Future Plans

simulation, electron, ion, detector

520

M. Sapinski, P. Forck, T. Giacomini, R. Singh, S. Udrea, D.M. Vilsmeier
GSI, Darmstadt, Germany
F. Belloni, J. Marroncle
CEA/IRFU, Gif-sur-Yvette, France
B. Dehning, J.W. Storey
CERN, Geneva, Switzerland
K. Satou
J-PARC, KEK & JAEA, Ibaraki-ken, Japan
C.A. Thomas
ESS, Lund, Sweden
R.M. Thurman-Keup
Fermilab, Batavia, Illinois, USA
C.C. Wilcox, R.E. Williamson
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom

Nonuniformities of the extraction fields, the velocity distribution of electrons from ionization processes and strong bunch fields are just a few of the effects affecting Ionization Profile Monitor measurements and operation. Careful analysis of these phenomena require specialized simulation programs. A handful of such codes has been written independently by various researchers over the recent years, showing an important demand for this type of study. In this paper we describe the available codes and discuss various approaches to Ionization Profile Monitor simulations. We propose benchmark conditions to compare these codes between themselves and we collect data from various devices to benchmark codes against the measurements. Finally we present a community effort with a goal to discuss the codes, exchange simulation results and to develop and maintain a new, common codebase.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG71

Export •

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

TUPG81

Space Charge Studies for the Ionisation Profile Monitors for the ESS Cold Linac

proton, electron, simulation, linac

555

C.A. Thomas
ESS, Lund, Sweden
F. Belloni, J. Marroncle
CEA/IRFU, Gif-sur-Yvette, France

In this paper, we present the results from a numerical code developed to study the effect of space charge on the performance of Ionisation Profile Monitors. The code has been developed from the analytical expression of the electromagnetic field generated by a 3D bunch of charged particles moving along one axis. This transient field is evaluated to calculate the momentum gained by a test moving particle, but not necessary co-moving with the bunch, and included in a non-linear ordinary differential equation solver (Runge-Kutta) to track the 3D motion of the test particle. The model of the IPM is complete when an additional constant electric field is included to project the test particle onto a screen. The results from this code, modelling the IPM to be developed for the ESS Cold Linac, are presented here, and the impact of the space charge on the measurement of the beam profile is discussed.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG81

Export •

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

WEAL01

Longitudinal Diagnostics Methods and Limits for Hadron Linacs

linac, cavity, diagnostics, simulation

563

A.P. Shishlo, A.V. Aleksandrov
ORNL, Oak Ridge, Tennessee, USA

Funding: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC0500OR22725 with the U.S. Department of Energy. The United States Govern-ment retains and the publisher,
A summary of the longitudinal diagnostics for linacs is presented based on the Spallation Neutron Source (SNS) linac example. It includes acceptance phase scans, Bunch Shape Monitors (BSM), and a method based on the analysis of the stripline Beam Position Monitors (BPM) signals. The last method can deliver the longitudinal Twiss parameters of the beam. The accuracy, applicability, and limitations of this method are presented and discussed.

Slides WEAL01 [2.256 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEAL01

Export •

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

WEPG47

Progress on the PITZ TDS

emittance, electron, laser, simulation

744

H. Huck, P. Boonpornprasert, L. Jachmann, W. Köhler, M. Krasilnikov, A. Oppelt, F. Stephan
DESY Zeuthen, Zeuthen, Germany
L.V. Kravchuk, V.V. Paramonov, A.A. Zavadtsev
RAS/INR, Moscow, Russia
C. Saisa-ard
Chiang Mai University, Chiang Mai, Thailand

A transverse deflecting system (TDS) is under commissioning at the Photo Injector Test Facility at DESY, Zeuthen site (PITZ). The structure was designed and manufactured by the Institute for Nuclear Research (INR RAS, Moscow, Russia) as prototype for the TDS in the injector part of the European XFEL. Last year the deflection voltage was limited for safety reasons, but after thorough investigations of the waveguide system we are now able to operate the cavity close to design specifications. The PITZ TDS streaks the electron beam vertically, allowing measurements of the longitudinal bunch profile, and, in combination with a subsequent horizontal bending magnet, also of the longitudinal phase space and slice energy spread. Furthermore, several quadrupole magnets and screen stations can be employed for slice emittance measurements using the TDS. This paper describes the progress in commissioning of the hardware, measurement techniques and simulations, and outlines the prospects of reliable slice emittance measurements at 20 MeV/c, where space charge forces complicate the determination of transfer matrices.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG47

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

WEPG66

Beam Induced Fluorescence Monitor R&D for the J-PARC Neutrino Beamline

proton, radiation, injection, vacuum

799

M.L. Friend
KEK, Ibaraki, Japan
C. Bronner, M. Hartz
Kavli IPMU, Kashiwa, Japan

Proton beam monitoring is essential for the J-PARC neutrino beamline, where neutrinos are produced by the collision of 30 GeV protons with a long carbon target. Along with continued upgrades to the J-PARC beam power, from the current 420 kW to 1.3+ MW, there is also a requirement for monitor upgrades. A Beam Induced Fluorescence monitor is under development, which would continuously and non-destructively measure the proton beam profile spill-by-spill by measuring fluorescence light from proton interactions with gas injected into the beamline. Monitor design is constrained by the J-PARC neutrino beamline configuration, where a major challenge will be getting sufficient signal to precisely reconstruct the proton beam profile. R&D for a pulsed gas injection system is under way, where injected gas uniformity and vacuum pump lifetime are main concerns. Design of a light detection system is also under way, where light transport away from the high radiation environment near the proton beamline, as well as fast detection down to very low light levels, are essential.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG66

Export •

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