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Progress in superconducting tunnel junction detectors
Author(s) -
Kurakado Masahiko
Publication year - 1999
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/(sici)1097-4539(199909/10)28:5<388::aid-xrs371>3.0.co;2-u
Subject(s) - detector , superconducting tunnel junction , resolution (logic) , superconductivity , physics , position (finance) , photon , optics , optoelectronics , x ray detector , energy (signal processing) , josephson effect , condensed matter physics , computer science , pi josephson junction , finance , artificial intelligence , economics , quantum mechanics
Superconducting tunnel junction (STJ) detectors have great potential as ultra‐high energy‐resolution detectors even at high count rates of over 10 4 counts per second. In fact, single‐junction detectors showed energy resolutions of better than 30 eV for 5.9 keV x‐rays, 6 eV for 277 eV x‐rays and 0.2 eV for 2 eV optical photons. Series‐junction detectors have much higher detection efficiencies than single‐junction detectors. A series‐junction detector equipped with a position‐sensing mechanism has shown a position resolution of about 35 µm in a sensing area with a diameter of 2.2 mm. The position resolution can improve the energy resolution of the detector. This paper briefly reviews the main principles of and progress in STJ detectors and gives a perspective of these detectors. Copyright © 1999 John Wiley & Sons, Ltd.