Quasiparticle diffusion and edge losses in superconducting tunnel junctiondetectors with two active electrodes

Authors
Parlato, L Ammendola, G Cristiano, R Esposito, E Frunzio, L Kraus, H Lisitskii, M Nappi, C Pagano, S Peluso, G Pepe, G Valko, P Barone, A
Citation
L. Parlato et al., Quasiparticle diffusion and edge losses in superconducting tunnel junctiondetectors with two active electrodes, NUCL INST A, 444(1-2), 2000, pp. 15-18
Citations number
6
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
15 - 18
Database
ISI
SICI code
0168-9002(20000411)444:1-2<15:QDAELI>2.0.ZU;2-4
Abstract
A theoretical model to describe the spectral response of SIS tunnel junctio ns under irradiation in the presence of diffusion and edge losses of non-eq uilibrium quasiparticles has been developed. The model takes into account t he back-tunnelling effect, in the general case of asymmetrical rates of tun nelling, gamma(12) not equal gamma(21). It provides a quantitative estimate of parameters like the edge reflectivity, the diffusion length and the dif fusion coefficient, which are important parameters for a diagnostic of STJ- detectors. The predictions of the theory are compared with an experimental spectrum obtained from a Nb-based STJ. (C) 2000 Elsevier Science B.V. All r ights reserved.