Cryogenic vacuum: New challenges for material science.

Spallino L., Angelucci M., Larciprete R., Cimino R.

VI - Fisica applicata, acceleratori e beni culturali
GSSI Ex ISEF - Aula A - Venerdì 27 h 09:00 - 12:00
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It is commonly believed that any material, at cryogenic temperature, will not influence vacuum. This is due to the fact that low temperature inhibits surface desorption and that any cold surface will act as a pumping wall. In an operating cryogenic system all vacuum components will undergo many different interactions during operation. This is indeed true in accelerators working in cryogenic vacuum, where, during accelerator performances, cold walls will interact with photons, ions and/or electrons and will certainly undergo thermal fluctuation. Here we present some relevant results and material properties of importance for an operating system in cryogenic vacuum.

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