Measurements of charge state distributions of 0.74 and 1.4  MeV/u heavy ions passing through dilute gases

In many modern heavy-ion accelerator facilities, gas strippers are used to increase the projectile charge state for improving the acceleration efficiency of ion beams to higher energies. For this application, the knowledge on the behavior of charge state distributions of heavy-ions after passing thr...

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Main Authors: P. Scharrer, Ch. E. Düllmann, W. Barth, J. Khuyagbaatar, A. Yakushev, M. Bevcic, P. Gerhard, L. Groening, K. P. Horn, E. Jäger, J. Krier, H. Vormann
Format: Article
Language:English
Published: American Physical Society 2017-04-01
Series:Physical Review Accelerators and Beams
Online Access:http://doi.org/10.1103/PhysRevAccelBeams.20.043503
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author P. Scharrer
Ch. E. Düllmann
W. Barth
J. Khuyagbaatar
A. Yakushev
M. Bevcic
P. Gerhard
L. Groening
K. P. Horn
E. Jäger
J. Krier
H. Vormann
author_facet P. Scharrer
Ch. E. Düllmann
W. Barth
J. Khuyagbaatar
A. Yakushev
M. Bevcic
P. Gerhard
L. Groening
K. P. Horn
E. Jäger
J. Krier
H. Vormann
author_sort P. Scharrer
collection DOAJ
description In many modern heavy-ion accelerator facilities, gas strippers are used to increase the projectile charge state for improving the acceleration efficiency of ion beams to higher energies. For this application, the knowledge on the behavior of charge state distributions of heavy-ions after passing through dilute gases is of special interest. Charge state distributions of uranium (^{238}U), bismuth (^{209}Bi), titanium (^{50}Ti), and argon (^{40}Ar) ion beams with energies of 0.74  MeV/u and 1.4  MeV/u after passing through hydrogen (H_{2}), helium (He), carbon dioxide (CO_{2}), nitrogen (N_{2}), oxygen (O_{2}), neon (Ne), and argon (Ar) gases were measured. Gas stripper target thicknesses up to 100  μg/cm^{2} were applied. The observed behavior of the charge state distributions, including their width and mean charge state, are discussed. The measurements show the highest equilibrium charge state at 1.4  MeV/u for ^{238}U on H_{2} gas of 29.2±1.2. Narrow charge state distributions are observed for ^{238}U and ^{209}Bi on H_{2} and He gas, which are highly beneficial, e.g., for the production of beams of high intensities in accelerators.
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spelling doaj.art-418523aebd85432a9a9ba89aeeb23d412022-12-22T00:02:23ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882017-04-0120404350310.1103/PhysRevAccelBeams.20.043503Measurements of charge state distributions of 0.74 and 1.4  MeV/u heavy ions passing through dilute gasesP. ScharrerCh. E. DüllmannW. BarthJ. KhuyagbaatarA. YakushevM. BevcicP. GerhardL. GroeningK. P. HornE. JägerJ. KrierH. VormannIn many modern heavy-ion accelerator facilities, gas strippers are used to increase the projectile charge state for improving the acceleration efficiency of ion beams to higher energies. For this application, the knowledge on the behavior of charge state distributions of heavy-ions after passing through dilute gases is of special interest. Charge state distributions of uranium (^{238}U), bismuth (^{209}Bi), titanium (^{50}Ti), and argon (^{40}Ar) ion beams with energies of 0.74  MeV/u and 1.4  MeV/u after passing through hydrogen (H_{2}), helium (He), carbon dioxide (CO_{2}), nitrogen (N_{2}), oxygen (O_{2}), neon (Ne), and argon (Ar) gases were measured. Gas stripper target thicknesses up to 100  μg/cm^{2} were applied. The observed behavior of the charge state distributions, including their width and mean charge state, are discussed. The measurements show the highest equilibrium charge state at 1.4  MeV/u for ^{238}U on H_{2} gas of 29.2±1.2. Narrow charge state distributions are observed for ^{238}U and ^{209}Bi on H_{2} and He gas, which are highly beneficial, e.g., for the production of beams of high intensities in accelerators.http://doi.org/10.1103/PhysRevAccelBeams.20.043503
spellingShingle P. Scharrer
Ch. E. Düllmann
W. Barth
J. Khuyagbaatar
A. Yakushev
M. Bevcic
P. Gerhard
L. Groening
K. P. Horn
E. Jäger
J. Krier
H. Vormann
Measurements of charge state distributions of 0.74 and 1.4  MeV/u heavy ions passing through dilute gases
Physical Review Accelerators and Beams
title Measurements of charge state distributions of 0.74 and 1.4  MeV/u heavy ions passing through dilute gases
title_full Measurements of charge state distributions of 0.74 and 1.4  MeV/u heavy ions passing through dilute gases
title_fullStr Measurements of charge state distributions of 0.74 and 1.4  MeV/u heavy ions passing through dilute gases
title_full_unstemmed Measurements of charge state distributions of 0.74 and 1.4  MeV/u heavy ions passing through dilute gases
title_short Measurements of charge state distributions of 0.74 and 1.4  MeV/u heavy ions passing through dilute gases
title_sort measurements of charge state distributions of 0 74 and 1 4 mev u heavy ions passing through dilute gases
url http://doi.org/10.1103/PhysRevAccelBeams.20.043503
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