Energy-resolving superconducting x-ray detectors with charge amplification due to multiple quasiparticle tunneling
1993; American Institute of Physics; Volume: 63; Issue: 21 Linguagem: Inglês
10.1063/1.110286
ISSN1520-8842
AutoresC. A. Mears, Simon E. Labov, A.T. Barfknecht,
Tópico(s)Superconductivity in MgB2 and Alloys
ResumoSuperconducting tunnel junctions coupled to superconducting absorbers may be used as high-resolution, high-efficiency x-ray spectrometers. We have tested devices with niobium x-ray absorbing layers coupled to aluminum layers that serve as quasiparticle traps. The energy resolution at 6 keV was 49 eV full width at half-maximum. We estimate that each quasiparticle tunnels an average of 19 times before recombining, increasing the total charge transferred and therefore decreasing the effects of electronic noise.
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