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| 001 | 619905 | ||
| 005 | 20250723173141.0 | ||
| 024 | 7 | _ | |a 10.1088/1361-6382/ad7184 |2 doi |
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| 024 | 7 | _ | |a arXiv:2402.11977 |2 arXiv |
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| 088 | _ | _ | |a arXiv:2402.11977 |2 arXiv |
| 100 | 1 | _ | |a Franke, Alexander |0 P:(DE-H253)PIP1021479 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Measurement of the thermal accommodation coefficient of helium on a crystalline silicon surface at low-temperatures |
| 260 | _ | _ | |a Bristol |c 2024 |b IOP Publ. |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 1742200664_653846 |2 PUB:(DE-HGF) |
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| 500 | _ | _ | |a 12 pages, 5 figures |
| 520 | _ | _ | |a Proposals for next-generation gravitational wave observatories include cryogenically cooled 200 kg test mass mirrors suspended from pendulums and made of 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 $\alpha(11\,\mathrm{K} \lt T \lt 30\,\mathrm{K})$, which is the probability that a helium atom thermalises with a surface at a given temperature when reflected from it. We find $\alpha(T) \gt 0.7$ for temperatures ${\lt}20$ K, which increases the cooling power compared to recently used assumptions. The idea of free molecular flow helium gas cooling is thus supported and might find application in some observatory concepts. |
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| 700 | 1 | _ | |a Sueltmann, Nils Frederik |0 P:(DE-H253)PIP1081510 |b 1 |
| 700 | 1 | _ | |a Reinhardt, Christoph |0 P:(DE-H253)PIP1093189 |b 2 |e Corresponding author |
| 700 | 1 | _ | |a Croatto, Sandy |0 P:(DE-H253)PIP1088048 |b 3 |
| 700 | 1 | _ | |a Schaffran, Joern |0 P:(DE-H253)PIP1001671 |b 4 |
| 700 | 1 | _ | |a Masalehdan, Hossein |0 P:(DE-H253)PIP1094928 |b 5 |
| 700 | 1 | _ | |a Lindner, Axel |0 P:(DE-H253)PIP1003168 |b 6 |
| 700 | 1 | _ | |a Schnabel, Roman |0 P:(DE-H253)PIP1094999 |b 7 |
| 773 | _ | _ | |a 10.1088/1361-6382/ad7184 |g Vol. 41, no. 19, p. 195013 - |0 PERI:(DE-600)1473117-4 |n 19 |p 195013 |t Classical and quantum gravity |v 41 |y 2024 |x 0264-9381 |
| 787 | 0 | _ | |a Franke, Alexander et.al. |d 2024 |i IsParent |0 PUBDB-2025-00343 |r arXiv:2402.11977 |t Measurement of the thermal accommodation coefficient of helium on a crystalline silicon surface at low-temperatures |
| 856 | 4 | _ | |y OpenAccess |u https://bib-pubdb1.desy.de/record/619905/files/Franke_2024_Class._Quantum_Grav._41_195013.pdf |
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