Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1743..351k&link_type=abstract
In: EUV, X-ray, and gamma-ray instrumentation for astronomy III; Proceedings of the Meeting, San Diego, CA, July 22-24, 1992 (A9
Astronomy and Astrophysics
Astronomy
6
Niobium, Signal To Noise Ratios, Superconducting Devices, Tunnel Diodes, X Ray Detectors, X Ray Spectra, Aluminum, Aluminum Oxides, Collimators, Energy Gaps (Solid State), Sapphire, Thermal Cycling Tests
Scientific paper
Two topics on our recent investigations into superconducting tunnel junction (STJ) detectors are discussed: the single Nb/Al-AlO(x)/Al/Nb junction for high-resolution X-ray detection and the series-connected superconducting tunnel junction detectors (SCSDs) with high detection efficiency. Using a single Nb/Al-AlO(x)/Al/Nb junction with rather large area of 178 x 178 sq microns, we obtained a high energy resolution of 88 eV for 5.9-keV X-rays. The signal-to-noise ratio of the SCSD is discussed from a simple theoretical formulation of electronics, showing that the series-connected STJs can developed as a nuclear radiation detector both with high energy resolution and high efficiency. Recent experimental results of our SCSD are also given.
Isozumi Yasuhito
Ito Shin
Katano Rintaro
Kurakado Masahiko
Matsumura Atsuki
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