Noise mechanisms in superconducting tunnel-junction detectors

被引：39

作者：

Segall, K ^{[1
]}

Wilson, C

Frunzio, L

Li, L

Friedrich, S

Gaidis, MC

Prober, DE

Szymkowiak, AE

Moseley, SH

机构：

[1] Yale Univ, Dept Appl Phys, New Haven, CT 06520 USA

[2] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

APPLIED PHYSICS LETTERS | 2000年 / 76卷 / 26期

关键词：

D O I：

10.1063/1.126796

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a theory and measurements of noise mechanisms in superconducting tunnel-junction detectors used as single-photon spectrometers. These mechanisms result from incomplete cooling of the excited quasiparticles in the tunnel-junction electrode. Due to the incomplete cooling, only a fraction of the initially created charge is collected by tunneling. Additional effects include reduced dynamic resistance, voltage dependence of the integrated charge, and increased statistical broadening of the signal. We demonstrate these noise mechanisms in our device, and show that they explain the measured energy resolution of 25 eV at 5.9 keV. We also suggest ways to reduce their contribution in future devices. (C) 2000 American Institute of Physics. [S0003-6951(00)03526-9].

引用

页码：3998 / 4000

页数：3

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