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000622480 005__ 20250323131315.0
000622480 0247_ $$2INSPIRETeX$$aFranke:2024hiy
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000622480 0247_ $$2arXiv$$aarXiv:2402.11977
000622480 037__ $$aPUBDB-2025-00343
000622480 041__ $$aEnglish
000622480 088__ $$2arXiv$$aarXiv:2402.11977
000622480 082__ $$a530
000622480 1001_ $$0P:(DE-H253)PIP1021479$$aFranke, Alexander$$b0$$eCorresponding author
000622480 245__ $$aMeasurement of the thermal accommodation coefficient of helium on a crystalline silicon surface at low-temperatures
000622480 260__ $$c2024
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000622480 500__ $$a12 pages, 5 figures
000622480 520__ $$aProposals for next-generation gravitational wave observatories include cryogenically cooled 200 kg test mass mirrors suspended from pendulums and made of a crystalline material such as crystalline silicon. During operation of the observatories, these mirrors undergo heating due to the absorption of laser radiation of up to a watt. Low noise cooling techniques need to be developed. Low-pressure helium exchange gas at 5 K might contribute to the challenging task. Here, we report the measurement of the helium accommodation coefficient $\alpha(11\,\mathrm{K} \lt T \lt 30\,\mathrm{K})$, which is the probability that a helium atom thermalises with a surface at a given temperature when reflected from it. We find $\alpha(T) \gt 0.7$ for temperatures ${\lt}20$ K, which increases the cooling power compared to recently used assumptions. The idea of free molecular flow helium gas cooling is thus supported and might find application in some observatory concepts.
000622480 536__ $$0G:(DE-HGF)POF4-611$$a611 - Fundamental Particles and Forces (POF4-611)$$cPOF4-611$$fPOF IV$$x0
000622480 536__ $$0G:(GEPRIS)390833306$$aDFG project G:(GEPRIS)390833306 - EXC 2121: Quantum Universe (390833306)$$c390833306$$x1
000622480 588__ $$aDataset connected to CrossRef, INSPIRE, Journals: bib-pubdb1.desy.de
000622480 650_7 $$2autogen$$aexperimental gravitation
000622480 650_7 $$2autogen$$acryogenics
000622480 650_7 $$2autogen$$agas cooling
000622480 650_7 $$2autogen$$agravitational wave detection
000622480 650_7 $$2autogen$$aaccommodation coefficient
000622480 693__ $$0EXP:(DE-MLZ)NOSPEC-20140101$$5EXP:(DE-MLZ)NOSPEC-20140101$$eNo specific instrument$$x0
000622480 7001_ $$aSültmann, Nils$$b1
000622480 7001_ $$0P:(DE-H253)PIP1093189$$aReinhardt, Christoph$$b2
000622480 7001_ $$0P:(DE-H253)PIP1088048$$aCroatto, Sandy$$b3
000622480 7001_ $$0P:(DE-H253)PIP1001671$$aSchaffran, Jörn$$b4
000622480 7001_ $$aMasalehdan, Hossein$$b5
000622480 7001_ $$0P:(DE-H253)PIP1003168$$aLindner, Axel$$b6
000622480 7001_ $$aSchnabel, Roman$$b7
000622480 8564_ $$uhttps://bib-pubdb1.desy.de/record/622480/files/2402.11977v1.pdf$$yRestricted
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000622480 9141_ $$y2024
000622480 915__ $$0StatID:(DE-HGF)0580$$2StatID$$aPublished
000622480 9101_ $$0I:(DE-H253)_CFEL-20120731$$6P:(DE-H253)PIP1021479$$aCentre for Free-Electron Laser Science$$b0$$kCFEL
000622480 9101_ $$0I:(DE-HGF)0$$6P:(DE-H253)PIP1021479$$aExternal Institute$$b0$$kExtern
000622480 9101_ $$0I:(DE-588b)2008985-5$$6P:(DE-H253)PIP1093189$$aDeutsches Elektronen-Synchrotron$$b2$$kDESY
000622480 9101_ $$0I:(DE-588b)2008985-5$$6P:(DE-H253)PIP1088048$$aDeutsches Elektronen-Synchrotron$$b3$$kDESY
000622480 9101_ $$0I:(DE-588b)2008985-5$$6P:(DE-H253)PIP1001671$$aDeutsches Elektronen-Synchrotron$$b4$$kDESY
000622480 9101_ $$0I:(DE-588b)2008985-5$$6P:(DE-H253)PIP1003168$$aDeutsches Elektronen-Synchrotron$$b6$$kDESY
000622480 9131_ $$0G:(DE-HGF)POF4-611$$1G:(DE-HGF)POF4-610$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lMatter and the Universe$$vFundamental Particles and Forces$$x0
000622480 9201_ $$0I:(DE-H253)ALPS-20130318$$kALPS$$lAny Light Particle Search$$x0
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000622480 980__ $$aI:(DE-H253)ALPS-20130318
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