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QSHS: an axion dark matter resonant search apparatus

Journal Article · · New Journal of Physics
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  1. Univ. of Oxford (United Kingdom)
  2. Lancaster Univ., Bailrigg (United Kingdom)
  3. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  4. National Physical Laboratory, Teddington (United Kingdom)
  5. London Centre for Nanotechnology (LCN) (United Kingdom)
  6. Univ. of Sheffield (United Kingdom)
  7. Univ. of Oxford (United Kingdom); Univ. of Liverpool (United Kingdom)
  8. Royal Holloway, Univ. of London (RHUL), Egham (United Kingdom)
  9. Univ. of Oxford (United Kingdom); Royal Holloway, Univ. of London (RHUL), Egham (United Kingdom)
  10. London Centre for Nanotechnology (LCN) (United Kingdom); Univ. College London (United Kingdom)
  11. Chinese Academy of Sciences (CAS), Beijing (China)
We describe a resonant cavity search apparatus for axion dark matter constructed by the quantum sensors for the hidden sector collaboration. The apparatus is configured to search for QCD axion dark matter, though also has the capability to detect axion-like particles, dark photons, and some other forms of wave-like dark matter. Initially, a tuneable cylindrical oxygen-free copper cavity is read out using a low noise microwave amplifier feeding a heterodyne receiver. The cavity is housed in a dilution refrigerator (DF) and threaded by a solenoidal magnetic field, nominally 8 T. The apparatus also houses a magnetic field shield for housing superconducting electronics, and several other fixed-frequency resonators for use in testing and commissioning various prototype quantum electronic devices sensitive at a range of axion masses in the range 2.0–40 μeV c-2. The apparatus as currently configured is intended as a test stand for electronics over the relatively wide frequency band attainable with TM010 the cavity mode used for axion searches. We present performance data for the resonator, DF, and magnet, and plans for the first science run.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
3019697
Report Number(s):
LLNL--JRNL-2007312
Journal Information:
New Journal of Physics, Journal Name: New Journal of Physics Journal Issue: 10 Vol. 27; ISSN 1367-2630
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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