TA-BASED TUNNEL-JUNCTIONS FOR ENERGY RESOLVING X-RAY-DETECTION

被引：4

作者：

BLAMIRE, MG ^{[1
]}

PORTER, FS ^{[1
]}

KIRK, ECG ^{[1
]}

VANVECHTEN, D ^{[1
]}

机构：

[1] USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1995年 / 5卷 / 02期

关键词：

D O I：

10.1109/77.403226

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We report the results of a programme to develop an energy-resolving superconducting tunnel junction based on a Ta X-ray absorber. The design is based on a vertical heterostructure consisting of a Nb underlayer to act as a quasiparticle reflector, a thick Ta absorber layer and an Al trap layer. The upper surface of this trap layer is oxidised to form the tunnel barrier. The counterelectrode consists of an Al and thin Nb layer with thicknesses controlled to give approximately equal energy gaps in both electrodes and minimal absorption in the Nb counterelectrode. The effect of electro-magnetic barrier resonances on detection performance has been evaluated. Very high quality junctions have been fabricated, tested and evaluated for X-ray energy resolution.

引用

页码：3014 / 3017

页数：4

共 22 条

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