Plasma and Fusion Research

Volume 17, 2405033 (2022)

Regular Articles

Cyogenic Thermal Conductivity Measurements of Yb:YAG Ceramics
Akifumi IWAMOTO1,2), Aurelien FOUR3) and Bertrand BAUDOUY3)
1)
National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
2)
Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
3)
Université Paris-Saclay, CEA, Département des Accélérateurs, de la Cryogénie et du Magnétisme, Gif-sur-Yvette, 91191, France
(Received 11 January 2022 / Accepted 15 February 2022 / Published 13 May 2022)

Abstract

Thermal conductivity of 9.8 at% Ytterbium-doped Yttrium Aluminum Garnet (Yb:YAG) ceramics has been measured by three systems at Commissariat à l'Énergie Atomique et aux énergies alternatives (CEA Paris-Saclay) and at the National Institute for Fusion Science (NIFS). For accurate measurements, thermal impedances in thermal systems should be negligibly small. However, each system includes some thermal impedance in a heat flow path. This paper describes that thermal conductivity of the 9.8% doped Yb:YAG ceramics and discusses the compensation method for thermal impedance in each system.

Keywords

thermal conductivity, Yb:YAG, cryogenic, steady-state differential method

DOI: 10.1585/pfr.17.2405033

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