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Author Inderbitzin, K.; Engel, A.; Schilling, A.; Il'in, K.; Siegel, M.
Title An ultra-fast superconducting Nb nanowire single-photon detector for soft x-rays Type Journal Article
Year 2012 Publication (up) Abbreviated Journal Appl. Phys. Lett.
Volume 101 Issue Pages
Keywords SSPD, SNSPD, x-ray, Nb
Abstract Although superconducting nanowire single-photon detectors (SNSPDs) are well studied regarding the

detection of infrared/optical photons and keV-molecules, no studies on continuous x-ray photon

counting by thick-film detectors have been reported so far. We fabricated a 100 nm thick niobium

x-ray SNSPD (an X-SNSPD) and studied its detection capability of photons with keV-energies in

continuous mode. The detector is capable to detect photons even at reduced bias currents of 0.4%,

which is in sharp contrast to optical thin-film SNSPDs. No dark counts were recorded in extended

measurement periods. Strikingly, the signal amplitude distribution depends significantly on the photon

energy spectrum.VC
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Notes Approved no
Call Number RPLAB @ seleznev @ Serial 878
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