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

被引：12

作者：

Scharrer, P. ^{[1
,2
,3
]}

Duellmann, Ch. E. ^{[1
,2
,3
]}

Barth, W. ^{[1
,2
]}

Khuyagbaatar, J. ^{[1
,2
]}

Yakushev, A. ^{[1
,2
]}

Bevcic, M. ^{[2
]}

Gerhard, P. ^{[2
]}

Groening, L. ^{[2
]}

Horn, K. P. ^{[2
]}

Jaeger, E. ^{[2
]}

Krier, J. ^{[2
]}

Vormann, H. ^{[2
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Helmholtz Inst Mainz, D-55099 Mainz, Germany

[2] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

[3] Johannes Gutenberg Univ Mainz, D-55099 Mainz, Germany

来源：

PHYSICAL REVIEW ACCELERATORS AND BEAMS | 2017年 / 20卷 / 04期

关键词：

CROSS-SECTIONS; AVERAGE CHARGE; EQUILIBRIUM; DEPENDENCE; STRIPPER; FOILS;

D O I：

10.1103/PhysRevAccelBeams.20.043503

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

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 (U-238), bismuth (Bi-209), titanium (Ti-50), and argon (Ar-40) ion beams with energies of 0.74 MeV/u and 1.4 MeV/u after passing through hydrogen (H-2), helium (He), carbon dioxide (CO2), nitrogen (N-2), oxygen (O-2), neon (Ne), and argon (Ar) gases were measured. Gas stripper target thicknesses up to 100 mu g/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 U-238 on H-2 gas of 29.2 +/- 1.2. Narrow charge state distributions are observed for U-238 and Bi-209 on H-2 and He gas, which are highly beneficial, e.g., for the production of beams of high intensities in accelerators.

引用

页数：14

共 7 条

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PHYSICA SCRIPTA, 2020, 95 (10)
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PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, 2010, 13 (09):
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NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2016, 373 : 117 - 125

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