IBIC2014 - List of Keywords (scattering)

Paper	Title	Other Keywords	Page
MOCYB1	Non-Destructive Vertical Halo Monitor on the ESRF’s 6GeV Electron Beam	electron, dipole, emittance, detector	2
	K.B. Scheidt ESRF, Grenoble, France
	The population density along the electron’s beam vertical profile at far distance from the central core (i.e. the far-away tails or “halo”) is now quantitatively measurable by the use of bending magnet X-rays. An available beamport is equipped with two specifically adapted absorbers, an Aluminium UHV window, an X-ray light blocker, an X-ray imager, and a few motorizations. The simple and inexpensive set-up (much resembling that of an X-ray pinhole camera system for emittance measurements in Light Sources, but much shorter in length) allows the recording of images of the electron density profile over the 0.5 to 6mm distance range from the core. Results, obtained under various manipulations on the electron beam to vary either Touchek or residual Gas scattering and thereby the Halo levels, will be presented, to fully demonstrate that this Halo monitor is exploring those realms of the beam where other diagnostics can not reach .
	Slides MOCYB1 [2.830 MB]
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MOPD02	The Electron Backscattering Detector (eBSD), a New Tool for the Precise Mutual Alignment of the Electron and Ion Beams in Electron Lenses	electron, ion, proton, detector	129
	P. Thieberger, Z. Altinbas, C. Carlson, C. Chasman, M.R. Costanzo, C. Degen, K.A. Drees, W. Fischer, D.M. Gassner, X. Gu, K. Hamdi, J. Hock, Y. Luo, A. Marusic, T.A. Miller, M.G. Minty, C. Montag, A.I. Pikin, S.M. White BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under contract No. DE-AC02-98CH10886 with the U.S. Department of Energy The Relativistic Heavy Ion Collider (RHIC) electron lenses, being commissioned to attain higher polarized proton-proton luminosities by partially compensating the beam-beam effect, require good alignment of the electron and proton beams. These beams propagating in opposite directions in a 5T solenoid have a typical rms width of 300 microns and need to overlap each other over an interaction length of about 2 m with deviations of less than ~50 microns. A new beam diagnostic tool to achieve and maintain this alignment is based on detecting electrons that are backscattered in close encounters with protons. Maximizing the intensity of these electrons ensures optimum beam overlap. The successful commissioning of these devices using 100 GeV/amu gold beams is described. Future developments are discussed that will further improve the sensitivity to small angular deviations.
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WEPF05	Simulation of the Beam Dump for a High Intensity Electron Gun	electron, simulation, gun, collider	536
	A. Jeff, S. Döbert, T. Lefèvre CERN, Geneva, Switzerland A. Jeff The University of Liverpool, Liverpool, United Kingdom K. Pepitone CEA, LE BARP cedex, France
	The CLIC Drive Beam is a high-intensity pulsed electron beam. A test facility for the Drive Beam electron gun will soon be commissioned at CERN. In this contribution we outline the design of a beam dump / Faraday cup capable of resisting the beam’s thermal load. The test facility will operate initially up to 140 keV. At such low energies, the electrons are absorbed very close to the surface of the dump, leading to a large energy deposition density in this thin layer. In order not to damage the dump, the beam must be spread over a large surface. For this reason, a small-angled cone has been chosen. Simulations using geant4 have been performed to estimate the distribution of energy deposition in the dump. The heat transport both within the electron pulse and between pulses has been modelled using finite element methods to check the resistance of the dump at high repetition rates. In addition, the possibility of using a moveable dump to measure the beam profile and emittance is discussed.
	Poster WEPF05 [0.224 MB]
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WEPF23	Dosimetric Verification of Lateral Profile with a Unique Ionization Chamber in Therapeutic Ion Beams	ion, target, factory, proton	597
	Y. Hara, T. Furukawa, K. Mizushima, K. Noda, N. S. Saotome, T. Shirai, R. Tansho NIRS, Chiba-shi, Japan Y. Saraya National Institute of Radiological Sciences, Chiba, Japan
	It is essential to consider large-angle scattered particles in dose calculation models for therapeutic ion beams. However, it is difﬁcult to measure the small dose contribution from large-angle scattered particles. Therefore, we developed a parallel-plate ionization chamber consisting of concentric electrodes (ICCE) to efﬁciently and easily detect small contributions. The ICCE consists of two successive ICs with a common HV plate. The former is a large plane-parallel IC to measure dose distribution integrated over the whole plane, the latter is a 24-channel parallel-plate IC with concentric electrodes to derive the characteristic parameters describing the lateral beam spread. The aim of this study is to evaluate the performance of the ICCE. By taking advantage of the characteristic of ICCE, we studied the recombination associated with lateral beam profile. Also, we measured carbon pencil beam in several different media by using ICCE. As a result, we confirmed the ICCE could be used as a useful tool to determine the characterization of the therapeutic ion beams.
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Paper

Title

Other Keywords

Page

MOCYB1

Non-Destructive Vertical Halo Monitor on the ESRF’s 6GeV Electron Beam

electron, dipole, emittance, detector

2

K.B. Scheidt
ESRF, Grenoble, France

The population density along the electron’s beam vertical profile at far distance from the central core (i.e. the far-away tails or “halo”) is now quantitatively measurable by the use of bending magnet X-rays. An available beamport is equipped with two specifically adapted absorbers, an Aluminium UHV window, an X-ray light blocker, an X-ray imager, and a few motorizations. The simple and inexpensive set-up (much resembling that of an X-ray pinhole camera system for emittance measurements in Light Sources, but much shorter in length) allows the recording of images of the electron density profile over the 0.5 to 6mm distance range from the core. Results, obtained under various manipulations on the electron beam to vary either Touchek or residual Gas scattering and thereby the Halo levels, will be presented, to fully demonstrate that this Halo monitor is exploring those realms of the beam where other diagnostics can not reach .

Slides MOCYB1 [2.830 MB]

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reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)

MOPD02

The Electron Backscattering Detector (eBSD), a New Tool for the Precise Mutual Alignment of the Electron and Ion Beams in Electron Lenses

electron, ion, proton, detector

129

P. Thieberger, Z. Altinbas, C. Carlson, C. Chasman, M.R. Costanzo, C. Degen, K.A. Drees, W. Fischer, D.M. Gassner, X. Gu, K. Hamdi, J. Hock, Y. Luo, A. Marusic, T.A. Miller, M.G. Minty, C. Montag, A.I. Pikin, S.M. White
BNL, Upton, Long Island, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under contract No. DE-AC02-98CH10886 with the U.S. Department of Energy
The Relativistic Heavy Ion Collider (RHIC) electron lenses, being commissioned to attain higher polarized proton-proton luminosities by partially compensating the beam-beam effect, require good alignment of the electron and proton beams. These beams propagating in opposite directions in a 5T solenoid have a typical rms width of 300 microns and need to overlap each other over an interaction length of about 2 m with deviations of less than ~50 microns. A new beam diagnostic tool to achieve and maintain this alignment is based on detecting electrons that are backscattered in close encounters with protons. Maximizing the intensity of these electrons ensures optimum beam overlap. The successful commissioning of these devices using 100 GeV/amu gold beams is described. Future developments are discussed that will further improve the sensitivity to small angular deviations.

Export •

reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)

WEPF05

Simulation of the Beam Dump for a High Intensity Electron Gun

electron, simulation, gun, collider

536

A. Jeff, S. Döbert, T. Lefèvre
CERN, Geneva, Switzerland
A. Jeff
The University of Liverpool, Liverpool, United Kingdom
K. Pepitone
CEA, LE BARP cedex, France

The CLIC Drive Beam is a high-intensity pulsed electron beam. A test facility for the Drive Beam electron gun will soon be commissioned at CERN. In this contribution we outline the design of a beam dump / Faraday cup capable of resisting the beam’s thermal load. The test facility will operate initially up to 140 keV. At such low energies, the electrons are absorbed very close to the surface of the dump, leading to a large energy deposition density in this thin layer. In order not to damage the dump, the beam must be spread over a large surface. For this reason, a small-angled cone has been chosen. Simulations using geant4 have been performed to estimate the distribution of energy deposition in the dump. The heat transport both within the electron pulse and between pulses has been modelled using finite element methods to check the resistance of the dump at high repetition rates. In addition, the possibility of using a moveable dump to measure the beam profile and emittance is discussed.

Poster WEPF05 [0.224 MB]

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reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)

WEPF23

Dosimetric Verification of Lateral Profile with a Unique Ionization Chamber in Therapeutic Ion Beams

ion, target, factory, proton

597

Y. Hara, T. Furukawa, K. Mizushima, K. Noda, N. S. Saotome, T. Shirai, R. Tansho
NIRS, Chiba-shi, Japan
Y. Saraya
National Institute of Radiological Sciences, Chiba, Japan

It is essential to consider large-angle scattered particles in dose calculation models for therapeutic ion beams. However, it is difﬁcult to measure the small dose contribution from large-angle scattered particles. Therefore, we developed a parallel-plate ionization chamber consisting of concentric electrodes (ICCE) to efﬁciently and easily detect small contributions. The ICCE consists of two successive ICs with a common HV plate. The former is a large plane-parallel IC to measure dose distribution integrated over the whole plane, the latter is a 24-channel parallel-plate IC with concentric electrodes to derive the characteristic parameters describing the lateral beam spread. The aim of this study is to evaluate the performance of the ICCE. By taking advantage of the characteristic of ICCE, we studied the recombination associated with lateral beam profile. Also, we measured carbon pencil beam in several different media by using ICCE. As a result, we confirmed the ICCE could be used as a useful tool to determine the characterization of the therapeutic ion beams.

Export •

reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)