On-chip coil integrated superconducting tunnel junction for a high performance X-ray detector

• Published in: Physica. C, Superconductivity Vol. 372; pp. 403 - 406
• Main Authors: Taino, Tohru, Kikuchi, Katsuya, Nanme, Masaki, Nakagawa, Hiroshi, Aoyagi, Masahiro, Sato, Hiroshi, Akoh, Hiroshi, Maehata, Keisuke, Ishibashi, Kenji, Sato, Hiromi, Otani, Chiko, Ikeda, Tokihiro, Oku, Takayuki, Kato, Hiroshi, Kawai, Kazuhiko, Miyasaka, Hiromasa, Takizawa, Yoshiyuki, Watanabe, Hiroshi, Shimizu, Hirohiko M
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.08.2002
• Subjects: Microstrip coil; Nb/Al/AlO x/Nb; OC 2-STJ; Superconducting tunnel junction; Nb/Al/AlO x /Nb; OC 2-STJ; Superconducting tunnel junction; Microstrip coil
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/S0921-4534(02)00710-4

On-chip coil integrated superconducting tunnel junction (OC 2-STJ) has been demonstrated for high performance X-ray detector. The STJ was fabricated by an improved fabrication technique based on a high quality Nb/Al/AlO x /Nb junction technology. The STJ shows high quality current–voltage characteristics with an ultra-low leakage current of a few nA at 0.4 K for 100 μm×100 μm junction. Typical critical current of the coil was achieved more than 50 mA for 2 μm line width, which can generate a magnetic field of about 10 mT into the STJ. It was found that the OC 2-STJ successfully responded to the irradiated 5.9 keV X-ray.