Browsing by Author "Mirabolfathi, N."

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    Performance of a large area photon detector for rare event search applications
    Fink, C. W.; Watkins, S. L.; Aramaki, T.; Brink, P. L.; Camilleri, J.; Defay, X.; Ganjam, S.; Kolomensky, Y. G.; Mahapatra, R.; Mirabolfathi, N.; Page, W. A.; Partridge, R.; Platt, M.; Pyle, M.; Sadoulet, B.; Serfass, B.; Zuber, S. (2021-01-11)
    We present the design and characterization of a large-area Cryogenic PhotoDetector designed for active particle identification in rare event searches, such as neutrinoless double beta decay and dark matter experiments. The detector consists of a 45.6 cm 2 surface area by a 1-mm-thick 10.6 g Si wafer. It is instrumented with a distributed network of Quasiparticle-trap-assisted Electrothermal feedback Transition-edge sensors with superconducting critical temperature T c = 41.5 mK to measure athermal phonons released from interactions with photons. The detector is characterized and calibrated with a collimated Fe-55 x-ray source incident on the center of the detector. The noise equivalent power is measured to be 1 x 10 - 17 W / Hz in a bandwidth of 2.7 kHz. The baseline energy resolution is measured to be sigma E = 3.86 +/- 0.04 ( stat . ) - 0.00 + 0.19 ( syst . ) eV. The detector also has an expected timing resolution of sigma t = 2.3 mu s for 5 sigma E events.