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Cryogenic apparatus for study of near-field heat transfer

SYSNO ASEP	0368238
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Cryogenic apparatus for study of near-field heat transfer
Author(s)	Králík, Tomáš (UPT-D)_{RID, ORCID, SAI} Hanzelka, Pavel (UPT-D)_{RID, ORCID, SAI} Musilová, Věra (UPT-D)_{RID, SAI, ORCID} Srnka, Aleš (UPT-D)_{RID, ORCID, SAI} Zobač, Martin (UPT-D)_{RID, ORCID}
Number of authors	5
Source Title	Review of Scientific Instruments. - : AIP Publishing - ISSN 0034-6748 Roč. 82, č. 5 (2011), 055106:1-5
Number of pages	5 s.
Language	eng - English
Country	US - United States
Keywords	cryogenics ; heat measurement ; heat radiation ; micrometry ; radiative transfer ; thermistors
Subject RIV	BJ - Thermodynamics
R&D Projects	IAA100650804 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z20650511 - UPT-D (2005-2011)
UT WOS	000291106700052
EID SCOPUS	79958053941
DOI	10.1063/1.3585985
Annotation	For bodies spaced in vacuum at distances shorter than the wavelength of the thermal radiation, radiative heat transfer substantially increases due to the contribution of evanescent electromagnetic waves. Experimental data on heat transfer in near-field regime are scarce. We have designed a cryogenic apparatus for the study of heat transfer over microscopic distances between metallic and non-metallic surfaces. Using a mechanical positioning system, a planeparallel gap between the samples, concentric disks, each 35 mm in diameter, is set and varied from 10(0) to 10(3) mu m. The heat transferred from the hot (10 - 100 K) to the cold sample (similar to 5 K) sinks into a liquid helium bath through a thermal resistor, serving as a heat flux meter. Transferred heat power within similar to 2 nW/cm(2) and similar to 30 mu W/cm(2) is derived from the temperature drop along the thermal resistor.
Workplace	Institute of Scientific Instruments
Contact	Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178
Year of Publishing	2012

Number of the records: 1