An experiment to distinguish between diffusive and specular surfaces for thermal radiation in cryogenic gravitational-wave detectors

An experiment to distinguish between diffusive and specular surfaces for thermal radiation in cryogenic gravitational-wave detectors Yusuke Sakakibara1,∗, Nobuhiro Kimura2, Toshikazu Suzuki2, Kazuhiro Yamamoto1, Chihiro Tokoku3, Takashi Uchiyama1, and Kazuaki Kuroda1 1Institute for Cosmic Ray Research (ICRR), University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan 2High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan 3Research Center for Electron Photon Science, Tohoku University, 1-2-1 Mikamine, Taihaku-ku, Sendai, Miyagi 982-0826, Japan ∗E-mail: ysakaki@icrr.u-tokyo.ac.jp