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Heat pulse studies of quasiparticle dynamics in superconducting tunnel junction photon detectors.

Steele, A. C. and Boyd, P. and Kozorezov, A. G. and Wigmore, J. K. and Bradley, D. Ian (2002) Heat pulse studies of quasiparticle dynamics in superconducting tunnel junction photon detectors. Physica B: Condensed Matter, 316-31 (1). pp. 583-585. ISSN 0921-4526

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Abstract

We describe experiments to characterise the responsivity of superconducting tunnel junction (STJ) X-ray detectors in which the absorbed photons were simulated by heat pulses. Independent values of tunnel and loss times could be inferred from the time variation of the STJ current, whilst its integration gave the total charge output. The effects of self-recombination and trapped magnetic flux could also be determined. Results were obtained at 1.3 K for a Nb STJ, and at 20 mK for a Ta device.

Item Type: Article
Journal or Publication Title: Physica B: Condensed Matter
Uncontrolled Keywords: superconducting tunnel junctions ; photon detectors ; flux trapping ; heat pulses
Subjects: Q Science > QC Physics
Departments: Faculty of Health and Medicine > Health Research
Faculty of Science and Technology > Physics
ID Code: 23543
Deposited By: Dr Richard P. Haley
Deposited On: 03 Feb 2009 11:53
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:11
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/23543

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