| Article | |
| Title | Estimation of the thermal radiation induced desorption yield for hydrogen and helium at liquid helium temperatures |
| Author(s) | Jenninger, Berthold (CERN) ; Bez, Elena (CERN) ; Stöltzel, Anke (CERN) ; Rooijakkers, Fleur (CERN) ; Tiirinen, Eino (CERN) |
| Publication | 2024 |
| Number of pages | 4 |
| In: | Vacuum 233 (2025) 113931 |
| DOI | 10.1016/j.vacuum.2024.113931 (publication) |
| Abstract | Infrared radiation induced desorption of adsorbed molecules from cryogenic surfaces can lead to potentially detrimental pressure limitation in cryogenic UHV/XHV systems. For a sub-monolayer coverage, we determined the corresponding yields for hydrogen and helium exposed to room temperature radiation to be in the order of 1·10−4 and 0.02 m2(W·s)−1 respectively. We used these yields to estimate the radiation induced pressure in the PUMA experiment, presently under construction at CERN. •Thermal radiation from room temperature causes pressure limitations in XHV cryo-vacuum systems.•The pressure limitation increases linear with the molecular coverage in the sub-monolayer regime.•We estimated the thermal radiation induced desorption yield for hydrogen and helium at 4.2 K. |
| Copyright/License | publication: © 2024-2025 The Authors (License: CC BY 4.0) |
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Запись создана 2024-12-11, последняя модификация 2024-12-11
