Research output: Contribution to Journal/Magazine › Journal article › peer-review
Phonon excitation of quasiparticles in niobium and tantalum superconducting tunnel junction photon detectors. / Wigmore, J. K.; Boyd, P.; Steele, A. C. et al.
In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 520, No. 1-3, 11.03.2004, p. 263-266.Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Phonon excitation of quasiparticles in niobium and tantalum superconducting tunnel junction photon detectors.
AU - Wigmore, J. K.
AU - Boyd, P.
AU - Steele, A. C.
AU - Kozorezov, A. G.
AU - Bradley, D. Ian
PY - 2004/3/11
Y1 - 2004/3/11
N2 - 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.
AB - 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.
KW - superconducting tunnel junctions
KW - X-ray detection
KW - non-equilibrium phonons
KW - self-recombination
KW - fluxoid loss
KW - X-RAY-DETECTORS
U2 - 10.1016/j.nima.2003.11.340
DO - 10.1016/j.nima.2003.11.340
M3 - Journal article
VL - 520
SP - 263
EP - 266
JO - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
IS - 1-3
ER -