Highly Collimated Photon Detection using Strongly Coupled Superconducting Tunnel Junctions

被引：6

作者：

Rando, N. ^{[1
]}

Foden, C. L. ^{[1
]}

Peacock, A. ^{[1
]}

van Dordrecht, A. ^{[1
]}

Lumley, J. ^{[2
]}

Pereira, C. ^{[2
]}

机构：

[1] European Space Agcy, Estec, Dept Space Sci, Div Astrophys, NL-2200 AG Noordwijk, Netherlands

[2] Oxford Instruments Sci Res Div, Cambridge, England

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1993年 / 3卷 / 01期

关键词：

D O I：

10.1109/77.233447

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：

Preliminary results on the X-Ray performance of Nb based superconducting tunnel junctions (STJ's) with a highly transmissive barrier are reported. The results of the investigation show that the energy resolution of these detectors can be improved by collimating the X-Ray photons onto the junction barrier area, thus reducing illumination of the surrounding substrate and leads. A charge output of about 50% of the theoretical maximum has been recorded for these STJ's, with a FWHM resolution of about 200 eV at 6 KeV. Several mechanisms which are believed to degrade the energy resolution are also discussed. X-Ray events are also detected by other junctions on the same chip which are not illuminated. This may indicate the presence of a marked phonon transmission along the sapphire substrate which acts as a "Phonon Wave-Guide", analogous to the light transmission mechanism in fibre optics.

引用

页码：2080 / 2083

页数：4

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