Detection of single x-ray photons by an annular superconducting tunnel junction

被引：9
|
作者：
Frunzio, L
Li, L
Prober, DE
Vernik, IV
Lisitskii, MP
Nappi, C
Cristiano, R
机构：
[1] Yale Univ, Dept Appl Phys, New Haven, CT 06520 USA
[2] Yale Univ, Dept Phys, New Haven, CT 06520 USA
[3] HYPRES Inc, Elmsford, NY 10523 USA
[4] CNR, Ist Cibernet E Caianiello, I-80078 Naples, Italy
[5] CNR, Ist Cibernet, I-80078 Pozzuoli, NA, Italy
[6] Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy
来源：
APPLIED PHYSICS LETTERS | 2001年 / 79卷 / 13期
关键词：
D O I：
10.1063/1.1405425
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present an experiment that detects photons by use of an annular Nb-based superconducting tunnel junction (STJ). In one magnetic field configuration, we stably trapped a single magnetic fluxon in the STJ barrier during a transition to the superconducting state. This is an innovative configuration which avoids the use of an externally applied field during detector operation. It offers potential benefits for STJs used in imaging arrays. In this configuration, and also in the conventional one with an externally applied parallel magnetic field, we observed current pulses produced by single 6 keV x-ray photons. The pulses were the same for the two configurations. (C) 2001 American Institute of Physics.
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收藏
页码：2103 / 2105
页数：3
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