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ST275 - Response of the Killed Electrode in STJ X-ray Detectors
Response of the Killed Electrode in STJ X-ray Detectors
V.A. Andrianov1 and V.P. Gorkov2
1Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics,
119991 Moscow, Russian Federation
2Lomonosov Moscow State University, Faculty of Computational Mathematics and Cybernetics, 119991 Moscow, Russian Federation
Abstract - The signals of STJ detectors Ti/Nb/Al,AlOx/Al/Nb/NbN with killed Ti/Nb electrode were studied as a function of the bias voltage, the energy of the absorbed quanta and the thickness of the electrodes. The nonlinearity of the energy calibration for the killed electrode signal had a positive curvature due to the quasiparticles self-recombination losses and 2Δ-phonon exchange. Suppression of residual signals of the killed electrode was achieved by increasing the thickness of this electrode.
Submitted to ESNF August 12, 2011; accepted September 29, 2011. Reference ST275, Category 4
Published in Journal of Low Temperature Physics 167, Numbers 3-4, 410-415 , (2012) .