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Figure 2
The geometric model of a cylindrical gas attenuator used for the thermodynamic simulation. The attenuator is 5 m in effective total length and 20 mm in diameter and filled with argon gas. The walls of the attenuator are cooled and kept at a constant temperature T0 = 300 K. The X-ray FEL beam of diameter 2 mm with a flat-top transverse profile enters from the left.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
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