X-RAY-DETECTION WITH NB/ALOX/NB SUPERCONDUCTING TUNNEL-JUNCTIONS AND ENERGY DIFFUSION EFFECT ON ENERGY RESOLUTION

被引：28

作者：

MATSUMURA, A ^{[1
]}

TAKAHASHI, T ^{[1
]}

KURAKADO, M ^{[1
]}

机构：

[1] NIPPON STEEL CORP LTD,ADV MAT & TECHNOL RES LABS,NAKAHARA KU,KAWASAKI 211,JAPAN

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1993年 / 329卷 / 1-2期

关键词：

D O I：

10.1016/0168-9002(93)90941-A

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Nb/AlOx/Nb superconducting tunnel junctions with low leakage current were fabricated. The ultra low leakage current was maintained after 100 thermal cycles. X-rays were detected with three sizes of junctions on several wafers. The pulse height spectra show the improvement of energy resolution with the increase in junction area. Using the diffusion length of excited electrons in the superconductor, the effect of dispersion of excited electron from the junction area to the electric lead and trap of excited electrons at the film edge (energy diffusion effect) was evaluated. Calculated results explain the characteristics of the experimental results. It is concluded that a large junction area is desirable to reduce the energy diffusion effect on the energy resolution.

引用

页码：227 / 237

页数：11

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