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Proceedings Paper

Computer modeling and analysis of thermal link performance for an optical refrigerator
Author(s): Kevin Byram; David Mar; John Parker; Steven Von der Porten; John Hankinson; Chris Lee; Kai Mayeda; Richard C. Haskell; Qimin Yang; Scott R. Greenfield; Richard I. Epstein
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Paper Abstract

We have used the thermal modeling tool in COMSOL Multiphysics to investigate factors that affect the thermal performance of the optical refrigerator. Assuming an ideal cooling element and a non-absorptive dielectric trapping mirror, the three dominant heating factors are blackbody radiation from the surrounding environment, conductive heat transfer through mechanical supports, and the absorption of fluoresced photons transmitted through the thermal link. Laboratory experimentation coupled with computer modeling using Code V optical software have resulted in link designs capable of reducing the transmission to 0.04% of the fluoresced photons emitted toward the thermal link. The ideal thermal link will have minimal surface area, provide complete optical isolation for the load, and possess high thermal conductivity. Modeling results imply that a 1cm3 load can be chilled to 102 K with currently available cooling efficiencies using a 100 W pump laser on a YB:ZBLANP system, and using an ideal link that has minimal surface area and no optical transmission. We review the simulated steady-state cooling temperatures reached by the heat load for several link designs and system configurations as a comparative measure of how well particular configurations perform.

Paper Details

Date Published: 4 February 2008
PDF: 14 pages
Proc. SPIE 6907, Laser Refrigeration of Solids, 69070C (4 February 2008); doi: 10.1117/12.764287
Show Author Affiliations
Kevin Byram, Harvey Mudd College (United States)
David Mar, Harvey Mudd College (United States)
John Parker, Harvey Mudd College (United States)
Steven Von der Porten, Harvey Mudd College (United States)
John Hankinson, Harvey Mudd College (United States)
Chris Lee, Harvey Mudd College (United States)
Kai Mayeda, Harvey Mudd College (United States)
Richard C. Haskell, Harvey Mudd College (United States)
Qimin Yang, Harvey Mudd College (United States)
Scott R. Greenfield, Los Alamos National Lab. (United States)
Richard I. Epstein, Los Alamos National Lab. (United States)

Published in SPIE Proceedings Vol. 6907:
Laser Refrigeration of Solids
Richard I. Epstein; Mansoor Sheik-Bahae, Editor(s)

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