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The low-Z XAS hutch configuration consists of two separate Helium gas spaces. The front end / I0 section is supplied by SSRL house helium supply, while the low-Z sample box section is supplied by the Helium cylinder in the hallway behind the 4-3 blue electronics racks. The two sections are separated by a thin polypropylene film inside a clamped O-ring assembly as indicated in the picture.
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