Speaker
Prof.
Shin-Hong Kim
(University of Tsukuba)
Description
We present the development of a Superconducting Tunnel Junction (STJ) detector using Hafnium (Hf) as a photon detector which was designed to search for radiative decay of cosmic background neutrinos. The photon energy spectrum from neutrino radiative decay has a sharp edge at high energy end. To detect this sharp edge, we need a micro-calorimeter of infrared photons with high energy resolution. We have optimized the condition of producing a Hf-STJ detector and observed that a Hf-STJ detector had Josephson current which disappeared by applying a magnetic field.
Author
Prof.
Shin-Hong Kim
(University of Tsukuba)
Co-authors
Prof.
Hirokazu Ikeda
(JAXA ISAS)
Mr
Hyun-Sang Jeong
(University of Tsukuba)
Mr
Ken-ichi Takemasa
(University of Tsukuba)
Mr
Kenji Kiuchi
(University of Tsukuba)
Prof.
Masashi Hazumi
(KEK IPNS)
Mr
Shinya Kanai
(University of Tsukuba)
Mr
Takashi Onjo
(University of Tsukuba)
Dr
Yuji Takeuchi
(University of Tsukuba)
