Photon energy dependence of spatial non-uniformity in super-conducting tunnel junction detectors between 200 ev and 10 keV

被引：4

作者：

Ohkubo, M ^{[1
]}

Ukibe, M

Zama, T

Ikeuchi, T

Katagiri, M

Ichimura, S

机构：

[1] UPTECH, AIST, Tsukuba, Ibaraki 3058568, Japan

[2] Meiji Univ, Kawasaki, Kanagawa 2148571, Japan

[3] Adv Sci Res Ctr, JAERI, Naka, Ibaraki 3191195, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2004年 / 520卷 / 1-3期

关键词：

X-ray spectroscopy; superconducting tunnel junction; synchrotron radiation; spatial profile;

D O I：

10.1016/j.nima.2003.11.331

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

It has been demonstrated by Low-Temperature Scanning Synchrotron Microscope that the spatial profiles of Nb/Al/AlOx/Al/Nb detectors are abnormally large in an energy range between 2 and 10 keV, and thus the detectors produce no clear total absorption peaks. Below 2 keV, on the other hand, full illumination experiments have afforded the evidence that the spatial uniformity is significantly improved, for example, an 100 gm square junction has an intrinsic energy resolution of 5.4 eV at 200 eV. These results reconfirm that carefully designed junction detectors with a reasonable size are ideal for energy-dispersive spectroscopy in a soft X-ray range. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：231 / 233

页数：3

共 7 条

[1]

BERG M, 1997, IEEE T APPL SUPERCON, V17, P3363

[2] Quasiparticle diffusion, edge losses, and back-tunneling in superconducting tunnel junctions under x-ray irradiation [J].