Outgassing of CCD components in the vacuum

Components with strong outgassing

VITON O-ring

The VITON O-ring is needed as a sealing for the vacuum in the cryostat. For a short time, this probe showed a very rich transient spectrum. It cannot easily be distinguished, whether this was an intrinsic emission of volatile substances or caused by air contaminants sticking to the elastic material before insertion of the probe.

Additionally, the following lines appeared permanently:

Line [amu]	Fragment ions
42	C₃H₆⁺
55	C₄H₇⁺
56	C₄H₈⁺ ?
57	C₄H₉⁺
67	C₅H₇⁺ ?
69	CF₃⁺
71	(not identifiable)

Analog spectrum of the VITON O-ring at 25° C.

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Last update: Mar 15, 2004
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