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Fiske modes in superconducting tunnel junction detectors

被引：12
作者：
Friedrich, S
Cunningham, MF
Frank, M
Labov, SE
Barfknecht, AT
Cramer, SP
机构：
[1] Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
[3] Conductus Inc, Sunnyvale, CA 94086 USA
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2000年 / 444卷 / 1-2期
基金：
美国国家航空航天局; 美国国家卫生研究院;
关键词：
cryogenic X-ray detectors; superconducting tunnel junctions; Fiske modes;
D O I：
10.1016/S0168-9002(99)01348-0
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
We are developing superconducting tunnel junction (STJ) X-ray spectrometers with high-energy resolution( < 10 eV for keV X-rays) and high count rate capabilities ( > 10 000 counts/s). We have examined the influence of Fiske mode resonances on energy resolution, maximum count rate and area of Nb-Al-AlOx-Al-Nb STJ detectors. At low count rate, these detectors have an energy resolution of 2.3 eV FWHM at 70 eV. At 20 000 counts/s, the resolution is 8.2 eV FWHM at 277 eV. We observe the optimum detector performance when the influence of Fiske modes is minimized. (C) 2000 Published by Elsevier Science B.V. All rights reserved.
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页码：151 / 155
页数：5
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