2021/01/11 by C. W. Fink, S. L. Watkins, T. Aramaki +15 · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Radiation Detection and Scintillator Technologies #Detector #Photodetector #Double beta decay #Photon #Collimated light #Bandwidth (computing) #Resolution (logic) #Calibration #Noise (video) #Particle identification
paper · doi:10.1063/5.0032372
openalex created_date 2020/10/08 · openalex publication_date 2021/01/11 · openalex updated_date 2026/08/05
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 cm2 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 Tc=41.5 mK to measure athermal phonons released from interactions with photons. The detector is characterized and calibrated with a collimated 55Fe x-ray source incident on the center of the detector. The noise equivalent power is measured to be 1×10−17 W/Hz in a bandwidth of 2.7 kHz. The baseline energy resolution is measured to be σE=3.86±0.04 (stat.)−0.00+0.19 (syst.) eV. The detector also has an expected timing resolution of σt=2.3 μs for 5 σE events.