The Physics Analysis of a Gas Attenuator with Argon as a Working Gas

[摘要] A gas attenuator is an important element of the LCLS facility. The attenuator must operate in a broad range of x-ray energies, provide attenuation coefficient between 1 and 10{sup 4} with the accuracy of 1% and, at the same time, be reliable and allow for many months of un-interrupted operation. S. Shen has recently carried out a detailed design study of the attenuator based on the use of nitrogen as a working gas. In this note we assess the features of the attenuator based on the use of argon. We concentrate on the physics issues, not the design features.

[发布日期] 2010-12-07

[学科分类] 核物理和高能物理

[关键词] ARGON;ATTENUATION;LIGHT SOURCES;FREE ELECTRON LASERS;LINEAR ACCELERATORS;DYNAMICS XFEL