Non-equilibrium dynamics in superconducting tunnel junction detectors

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Superconducting tunnel junctions have the potential to serve as high-resolution, high-efficiency x-ray detectors for astrophysical and industrial applications. When irradiated by X rays, each X ray excites over 10{sup 6} charge carriers which cause the detector to generate a pulse of current. We present an analysis of pulse shapes from detectors we have constructed and operated. We fit the decay of the current pulse to a simple model that considers two classes of carrier loss. One model considers only the normal recombination of the charge carriers with themselves, the other included additional losses due to recombination sites in the within ... continued below

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13 p.

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Hiller, L. J.; Labov, S. E.; Mears, C. A.; Frank, M.; Bello, A. F. & Barfknecht, A. T. December 9, 1994.

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Superconducting tunnel junctions have the potential to serve as high-resolution, high-efficiency x-ray detectors for astrophysical and industrial applications. When irradiated by X rays, each X ray excites over 10{sup 6} charge carriers which cause the detector to generate a pulse of current. We present an analysis of pulse shapes from detectors we have constructed and operated. We fit the decay of the current pulse to a simple model that considers two classes of carrier loss. One model considers only the normal recombination of the charge carriers with themselves, the other included additional losses due to recombination sites in the within the detector medium. We found that both mechanisms most be taken into account. We also found a small variation in pulse shape depending on which layer of the tunnel junction absorbed the X ray. We expect that this analysis will be a useful tool in comparing different detector designs and operating conditions.

Physical Description

13 p.

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OSTI as DE95011734

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  • Annual meeting of the Society of Photo-Optical Instrumentation Engineers, San Diego, CA (United States), 24-29 Jul 1994

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  • Other: DE95011734
  • Report No.: UCRL-JC--119293
  • Report No.: CONF-940723--41
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 78704
  • Archival Resource Key: ark:/67531/metadc719642

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  • December 9, 1994

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  • Sept. 29, 2015, 5:31 a.m.

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  • Feb. 19, 2016, 8:27 p.m.

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Hiller, L. J.; Labov, S. E.; Mears, C. A.; Frank, M.; Bello, A. F. & Barfknecht, A. T. Non-equilibrium dynamics in superconducting tunnel junction detectors, article, December 9, 1994; California. (digital.library.unt.edu/ark:/67531/metadc719642/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.