Development of superconducting tunnel junction detectors for high-resolution X-ray spectroscopy

Authors
Angloher, G Beckhoff, B Buhler, M von Feilitzsch, F Hertrich, T Hettl, P Hohne, J Huber, M Jochum, J Mossbauer, RL Schnagl, J Scholze, F Ulm, G
Citation
G. Angloher et al., Development of superconducting tunnel junction detectors for high-resolution X-ray spectroscopy, NUCL INST A, 444(1-2), 2000, pp. 214-219
Citations number
5
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
444
Issue
1-2
Year of publication
2000
Pages
214 - 219
Database
ISI
SICI code
0168-9002(20000411)444:1-2<214:DOSTJD>2.0.ZU;2-K
Abstract
The energy resolution of aluminum superconducting tunnel junctions (Al-STJs ) has been improved by the introduction of a metallic buffer layer undernea th the junction. When irradiated by 5.9 keV X-rays, a resolution of 12 eV ( FWHM) was achieved for a junction size of 100 x 100 mu m(2). A mobile refri gerator system allowed to characterize these devices at the PTB-beamlines o f the electron storage rings Bessy I and Bessy II. They showed linear energ y response in the range between 200 eV and 6.5 keV and a strong increase in reduced energy events if irradiated at X-ray energies below the Al absorpt ion edge at 1.56 keV. (C) 2000 Elsevier Science B.V. All rights reserved.