| Autor: |
Yoichi Nakai, Hitoshi Oyama, Takayuki Oku, Tokihiro Ikeda, Hiromasa Miyasaka, Yoshiyuki Takizawa, Kazuhiko Kawai, Nagayasu Oshima, Hiroshi Kato, Y. Iwai, Chiko Otani, Y. Morishita, Yasunori Yamazaki, Hiroshi Watanabe, Yasuyuki Kanai, Hirohiko M. Shimizu, Hiromi Sato |
| Rok vydání: |
2002 |
| Předmět: |
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| Zdroj: |
Physica C: Superconductivity. :391-394 |
| ISSN: |
0921-4534 |
| DOI: |
10.1016/s0921-4534(02)00707-4 |
| Popis: |
A superconducting tunnel junction (STJ) is a newly developed X-ray detector which has advantages of not only high energy-resolution but also timing information and high counting-rates. The STJ fabricated in RIKEN has a layered structure of Nb (200 nm-thick, lower electrode)/Al (50 nm)/AlOx/Al (50 nm)/Nb (150 nm, upper electrode). Its sensitive region has an area of 100×100 μ m2. The output signals were amplified by either a charge-sensitive amplifier or a SQUID amplifier. We used the STJ to measure X-rays emitted in collisions of highly charged ions with various solid targets. The ions used were Ne, O and Ar of 10 kV/q extracted from an ECR ion source at RIKEN. The X-ray spectra from 500 to 900 eV were obtained with an energy-resolution of 20–30 eV at a counting-rate higher than 500 counts/s. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect