| Presentation | 2017-10-04 Development of Superconducting Tunnel Junction Detector using Hafnium for COBAND experiment Kenichi Takemasa, Shinhong Kim, Yuji Takeuchi, Takashi Iida, Chisa Asano, Rena Wakasa, Akihiro Kasajima, Hironobu Kanno, Coband experiment collaborator, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We are developing Superconducting Tunnel Junction detector using hafnium (Hf-STJ) as a far-infrared single photon detector for COsmic BAckground Neutrino Decay search (COBAND) experiment. We have successfully produced a superconductor-insulator-superconductor structure using hafnium. However, it is found to suffer from a large leakage current and needs modification of the Hf-STJ to reduce it. Rough surface of hafnium layer makes defect of insulator. We modified the sputtering condition to make smooth hafnium layer, then we obtained two new sputtering conditions. These conditions have surface RMS of 2.5 nm and 0.93 nm respectively. We have developed two Hf-STJs using these two parameters respectively. We report characteristics of these Hf-STJs. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Superconducting Tunnel Junction / Neutrino / Hafnium |
| Paper # | SCE2017-21 |
| Date of Issue | 2017-09-27 (SCE) |
| Conference Information | |
| Committee | SCE |
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| Conference Date | 2017/10/4(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Hiroaki Myoren(Saitama Univ.) |
| Vice Chair | |
| Secretary | (National Defense Academy) |
| Assistant | Hiroyuki Akaike(Daido Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Superconductive Electronics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Development of Superconducting Tunnel Junction Detector using Hafnium for COBAND experiment |
| Sub Title (in English) | |
| Keyword(1) | Superconducting Tunnel Junction |
| Keyword(2) | Neutrino |
| Keyword(3) | Hafnium |
| 1st Author's Name | Kenichi Takemasa |
| 1st Author's Affiliation | University of Tsukuba(Univ. of Tsukuba) |
| 2nd Author's Name | Shinhong Kim |
| 2nd Author's Affiliation | University of Tsukuba(Univ. of Tsukuba) |
| 3rd Author's Name | Yuji Takeuchi |
| 3rd Author's Affiliation | University of Tsukuba(Univ. of Tsukuba) |
| 4th Author's Name | Takashi Iida |
| 4th Author's Affiliation | University of Tsukuba(Univ. of Tsukuba) |
| 5th Author's Name | Chisa Asano |
| 5th Author's Affiliation | University of Tsukuba(Univ. of Tsukuba) |
| 6th Author's Name | Rena Wakasa |
| 6th Author's Affiliation | University of Tsukuba(Univ. of Tsukuba) |
| 7th Author's Name | Akihiro Kasajima |
| 7th Author's Affiliation | University of Tsukuba(Univ. of Tsukuba) |
| 8th Author's Name | Hironobu Kanno |
| 8th Author's Affiliation | University of Tsukuba(Univ. of Tsukuba) |
| 9th Author's Name | Coband experiment collaborator |
| 9th Author's Affiliation | *(*) |
| Date | 2017-10-04 |
| Paper # | SCE2017-21 |
| Volume (vol) | vol.117 |
| Number (no) | SCE-223 |
| Page | pp.pp.1-4(SCE), |
| #Pages | 4 |
| Date of Issue | 2017-09-27 (SCE) |