Beam Loss in HIRFL-CSR Due to CollisionsWith Residual Gas in Vacuum

Tang Jingyu; Lei Wen; Wang Yifang

Chinese Physics C> 1998, Vol. 22> Issue(8) : 745-754

Beam Loss in HIRFL-CSR Due to CollisionsWith Residual Gas in Vacuum

Institute of Modern Physics, TheChinese Academy of Sciences,Lanzhou 730000

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Abstract：
This paper discusses the collision of heavy ions with residual gas atoms in the vacuum and the cross-sections of the collision processes. Tlhe method calculating beam transmission efficiency in vacuum is presented taking HIRFL and CSR machine as examples. Based on rich experimental data a series of empirical formulae of calculating the cross-section of charge changing process is given. The transmission efficiency curvcs of different sections in HIRFL and CSR are also calculated, and thus the reasonable requirements for HIRFl and CSR vacuum systems ue given. The calculation method has been checked by the measurements of vacuum and beam loss in HIRFL.

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Tang Jingyu, Lei Wen and Wang Yifang. Beam Loss in HIRFL-CSR Due to CollisionsWith Residual Gas in Vacuum[J]. Chinese Physics C, 1998, 22(8): 745-754.

Tang Jingyu, Lei Wen and Wang Yifang. Beam Loss in HIRFL-CSR Due to CollisionsWith Residual Gas in Vacuum[J]. Chinese Physics C, 1998, 22(8): 745-754. shu

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Received: 1900-01-01
Revised: 1900-01-01

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