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Analysis of the Conductivity of the Thermal Contact between a Nd:YAG Crystal and a Copper Cooling Mount
New Phys.: Sae Mulli 2018; 68: 358~362
Published online March 30, 2018;
© 2018 New Physics: Sae Mulli.

Chihyun JUNG1, Jaewoo JUNG1, Jonghoon YI*1, Byeonghun CHA2

1 Department of Physics, Yeungnam University, Gyeongsan 38541, Korea
2 Korea Atomic Energy Research Institute, Daejon 34057, Korea
Correspondence to:
Received December 15, 2017; Revised January 30, 2018; Accepted January 30, 2018.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
The properties of the thermal contact between the laser crystal and the copper cooling mount were measured while varying the pressure applied to the surface of the laser rod and the material for heat transfer. The diameter of the Nd:YAG crystal was 3 mm and its length was 75 mm. Circulating cooling water and a thermo-electric cooler maintained the copper mount at a constant temperature. The conductance of the thermal contact was measured when a graphite sheet, a thermal conductive paste, or an indium foil was used as a heat transfer material, as well as when no heat transfer material was used. Of the materials used in the experiments, the thermal conductive paste showed the highest thermal contact conductivity. When no heat transfer material was used, the thermal-contact's conductivity increased in proportion to the pressure applied on the laser rod.
PACS numbers: 42.55.Xi, 44.10.+i, 42.60.Da
Keywords: Thermal conductance, Laser heat removal, Nd:YAG

July 2018, 68 (7)
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