Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Heat pulse studies of quasiparticle dynamics in superconducting tunnel junction photon detectors.
AU - Steele, A. C.
AU - Boyd, P.
AU - Kozorezov, A. G.
AU - Wigmore, J. K.
AU - Bradley, D. Ian
PY - 2002/5
Y1 - 2002/5
N2 - We describe experiments to characterise the responsivity of superconducting tunnel junction (STJ) X-ray detectors in which the absorbed photons were simulated by heat pulses. Independent values of tunnel and loss times could be inferred from the time variation of the STJ current, whilst its integration gave the total charge output. The effects of self-recombination and trapped magnetic flux could also be determined. Results were obtained at 1.3 K for a Nb STJ, and at 20 mK for a Ta device.
AB - We describe experiments to characterise the responsivity of superconducting tunnel junction (STJ) X-ray detectors in which the absorbed photons were simulated by heat pulses. Independent values of tunnel and loss times could be inferred from the time variation of the STJ current, whilst its integration gave the total charge output. The effects of self-recombination and trapped magnetic flux could also be determined. Results were obtained at 1.3 K for a Nb STJ, and at 20 mK for a Ta device.
KW - superconducting tunnel junctions
KW - photon detectors
KW - flux trapping
KW - heat pulses
U2 - 10.1016/S0921-4526(02)00579-3
DO - 10.1016/S0921-4526(02)00579-3
M3 - Journal article
VL - 316-31
SP - 583
EP - 585
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 1
ER -