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Title: High-resolution gamma-ray spectroscopy with a microwave-multiplexed transition-edge sensor array

We demonstrate very high resolution photon spectroscopy with a microwave-multiplexed two-pixel transition-edge sensor (TES) array. We measured a {sup 153}Gd photon source and achieved an energy resolution of 63 eV full-width-at-half-maximum at 97 keV and an equivalent readout system noise of 86 pA/√(Hz) at the TES. The readout circuit consists of superconducting microwave resonators coupled to radio-frequency superconducting-quantum-interference-devices and transduces changes in input current to changes in phase of a microwave signal. We use flux-ramp modulation to linearize the response and evade low-frequency noise. This demonstration establishes one path for the readout of cryogenic X-ray and gamma-ray sensor arrays with more than 10{sup 3} elements and spectral resolving powers R=λ/Δλ>10{sup 3}.
Authors:
 [1] ;  [2] ; ; ; ; ; ; ; ; ; ; ;  [1] ;  [3]
  1. National Institute of Standards and Technology, Boulder, Colorado 80305 (United States)
  2. (United States)
  3. Department of Physics, University of Colorado, Boulder, Colorado 80309 (United States)
Publication Date:
OSTI Identifier:
22224085
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 20; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ENERGY RESOLUTION; EV RANGE 10-100; GADOLINIUM 153; GAMMA RADIATION; GAMMA SPECTROMETERS; GAMMA SPECTROSCOPY; MICROWAVE RADIATION; NOISE; PHOTONS; RADIOWAVE RADIATION; READOUT SYSTEMS; RESONATORS; SENSORS; SQUID DEVICES; X RADIATION