Measurement of the thermal accommodation coefficient of helium on a crystalline silicon surface at low-temperatures
Autor: | Franke, Alexander, Sültmann, Nils, Reinhardt, Christoph, Croatto, Sandy, Schaffran, Jörn, Masalehdan, Hossein, Lindner, Axel, Schnabel, Roman |
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Rok vydání: | 2024 |
Předmět: | |
Druh dokumentu: | Working Paper |
Popis: | Next-generation gravitational wave observatories are expected to use cryogenically cooled, pendulum-suspended 200 kg test mass mirrors from a crystalline material such as crystalline silicon. During operation of the observatories, these mirrors undergo heating due to the absorption of laser radiation of up to a watt. Low noise cooling techniques need to be developed. Low-pressure helium exchange gas at 5 K might contribute to the challenging task. Here, we report the measurement of the helium accommodation coefficient $\alpha(11\,\mathrm{K} Comment: 12 pages, 5 figures |
Databáze: | arXiv |
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