Investigation of high thermal contact conductance at low contact pressure for high-heat-load optical elements of synchrotron radiation

T. Takeuchi; M. Tanaka; H. Ohashi; S. Goto

doi:10.1117/12.2025369

27 September 2013 Investigation of high thermal contact conductance at low contact pressure for high-heat-load optical elements of synchrotron radiation

T. Takeuchi, M. Tanaka, H. Ohashi, S. Goto

Author Affiliations +

Proceedings Volume 8848, Advances in X-Ray/EUV Optics and Components VIII; 884813 (2013) https://doi.org/10.1117/12.2025369
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

We measured the thermal-contact-conductance (TCC) of indirect cooling components in synchrotron radiation beamlines. To reduce the strain on the optical element, we explored conditions for insertion materials with a high TCC in region with low contact pressures of 0.1-1.0 MPa. We examined the TCC at the interface between oxygen-free copper (OFC) and insertion materials such as indium, graphite, and gold foil. The TCC depended on the hardness and thickness of the insertion material. Thin indium (20 μm thick) showed the highest TCC. Nickel and gold passivation on the OFC surface reduced the TCC to 30% of that for the bare OFC. Future work will involve exploring the passivation conditions of OFC for higher TCC is and measuring the TCC under cryogenic-cooling conditions.

Citation Download Citation

T. Takeuchi, M. Tanaka, H. Ohashi, and S. Goto "Investigation of high thermal contact conductance at low contact pressure for high-heat-load optical elements of synchrotron radiation", Proc. SPIE 8848, Advances in X-Ray/EUV Optics and Components VIII, 884813 (27 September 2013); https://doi.org/10.1117/12.2025369

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