Linearity investigations and pulse shape analysis of high resolution STJ X-ray detectors

Details Linearity investigations and pulse shape analysis of high resolution STJ X-ray detectors Linearity investigations and pulse shape analysis of high resolution STJ X-ray detectors

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..605...63h&link_type=abstract

LOW TEMPERATURE DETECTORS: Ninth International Workshop on Low Temperature Detectors. AIP Conference Proceedings, Volume 605, p

Physics

1

Superconducting Optical, X-Ray, And Gamma-Ray Detectors, X- And Gamma-Ray Sources, Mirrors, Gratings, And Detectors

Scientific paper

A slight deviation from linearity has been detected for single aluminum superconducting tunnel junction (Al-STJ) detectors in the energy range between E=1.74 keV and E=6.49 keV. The nonlinearity can be explained by the escape of recombination phonons into the substrate. Varying the size of the junction shows that the recombination of the quasiparticles takes place after their diffusive propagation across the junction. Pulse shape analysis allows to identify background events that are caused by photo-and Auger-electron propagation. For a detector system based on a Al-STJ with a Pb absorber pulse shape analysis allows to separate events related to absorption in the STJ and in the absorber. .

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