Development of superconducting tunnel junction detector using hafnium for COBAND experiment

Kenichi Takemasa, Shinhong Kim, Yuji Takeuchi, Kazuki Nagata, Kota Kasahara, Shunsuke Yagi, Rena Wakasa, Chisa Asano, Youiti Ootuka, Satoru Mima, Kenji Kiuchi, Yasuo Arai, Ikuo Kurachi, Masashi Hazumi, Hirokazu Ishino, Atsuko Kibayashi, Takuo Yoshida, Makoto Sakai, Takahiro Nakamura, Yukihiro KatoShuji Matsuura, Shoji Kawahito, Hirokazu Ikeda, Takehiko Wada, Koichi Nagase, Shunsuke Baba, Shigetomo Shiki, Masahiro Ukibe, Go Fujii, Masataka Ohkubo, Erik Ramberg, Mark Kozlovsky, Paul Rubinov, Jonghee Yoo, Domitri A. Sergatskov, Soo Bong Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present the development of a Superconducting Tunnel Junction detector using hafnium (Hf-STJ) as a far infrared single photon detector for COsmic BAckground Neutrino Decay search (COBAND) experiment. The photon energy spectrum from the decay of cosmic background neutrino is expected to have a sharp edge at the high energy end in a far-infrared region ranging from 14–25 meV in the cosmic infrared background and the overwhelming infrared foreground from the zodiacal emission. We are developing a Hf-STJ which is expected to have 2% energy resolution for a single photon of 25 meV. We have successfully produced a superconductor-insulator-superconductor structure using Hf. However, it is found to suffer from a large leakage current and needs modification of the Hf-STJ to reduce it. We have developed two new types of Hf-STJ: Hf-STJ with an Al layer and Hf-STJ with a new sputtering condition. The leakage current density of two new types of Hf-STJ becomes 16 times smaller than the old Hf-STJ and obtained a response to the visible light. Because of its large leakage current, further optimization is underway.

Original languageEnglish
Title of host publicationProceedings of International Conference on Technology and Instrumentation in Particle Physics 2017 - Volume 2
EditorsZhen-An Liu
PublisherSpringer Science and Business Media, LLC
Pages254-258
Number of pages5
Volume213
ISBN (Print)9789811313158
DOIs
Publication statusPublished - Jan 1 2018
EventInternational Conference on Technology and Instrumentation in Particle Physics, TIPP 2017 - Beijing, China
Duration: May 22 2017May 26 2017

Other

OtherInternational Conference on Technology and Instrumentation in Particle Physics, TIPP 2017
CountryChina
CityBeijing
Period5/22/175/26/17

Keywords

  • Hafnium
  • Neutrino decay
  • Superconducting tunnel junction

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Development of superconducting tunnel junction detector using hafnium for COBAND experiment'. Together they form a unique fingerprint.

  • Cite this

    Takemasa, K., Kim, S., Takeuchi, Y., Nagata, K., Kasahara, K., Yagi, S., Wakasa, R., Asano, C., Ootuka, Y., Mima, S., Kiuchi, K., Arai, Y., Kurachi, I., Hazumi, M., Ishino, H., Kibayashi, A., Yoshida, T., Sakai, M., Nakamura, T., ... Kim, S. B. (2018). Development of superconducting tunnel junction detector using hafnium for COBAND experiment. In Z-A. Liu (Ed.), Proceedings of International Conference on Technology and Instrumentation in Particle Physics 2017 - Volume 2 (Vol. 213, pp. 254-258). Springer Science and Business Media, LLC. https://doi.org/10.1007/978-981-13-1316-5_47