Wigmore, J. K. and Boyd, P. and Steele, A. C. and Kozorezov, A. G. and Bradley, D. Ian (2004) Phonon excitation of quasiparticles in niobium and tantalum superconducting tunnel junction photon detectors. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 520 (1-3). pp. 263-266. ISSN 0168-9002Full text not available from this repository.
We report phonon pulse measurements of quasiparticle (qp) self-recombination and trapping by Abrikosov vortice's in Nb and Ta superconducting tunnel junctions. The quasiparticle loss times, determined from the shape of the tunnel junction output pulse, were found to be strongly correlated with flux trapping. The measured results were compared with the model of Golubov and Houwman. It was found that qp self-recombination, as measured from the dependence of responsivity on absorbed phonon energy, was also modified by the presence of traps. A process of phonon-mediated de-trapping is proposed to explain the observed effects.
|Journal or Publication Title:||Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|Uncontrolled Keywords:||superconducting tunnel junctions ; X-ray detection ; non-equilibrium phonons ; self-recombination ; fluxoid loss ; X-RAY-DETECTORS|
|Subjects:||Q Science > QC Physics|
|Departments:||Faculty of Science and Technology > Physics|
Faculty of Health and Medicine > Health Research
|Deposited By:||Dr Richard P. Haley|
|Deposited On:||03 Feb 2009 11:48|
|Last Modified:||30 May 2014 11:55|
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