The Axion Dark Matter eXperiment (ADMX) aims to detect axions from the
galactic halo. The experiment consists of a microwave cavity in a magnetic field.
When an axion passes through the cavity, it has a small probability to decay
into microwave photons. ADMX has two primary analysis channels, Medium
Resolution (MedRes) and High Resolution (HiRes), with frequency resolutions
of 200 Hz and 20 mHz, respectively. The HiRes channel is concerned with
detecting nonvirialized axions from flows with small velocity dispersions, whose
signals would have a width of approximately 100 mHz or less. The most recent
run, 1c, covered approximately 800 MHz to 1 GHz, corresponding to an axion
mass of 3.3-4.1 μeV. This poster will cover how this data was collected and
processed, the HiRes analysis procedure, and prelimenary results.
*This work was supported by the U.S. Department of Energy through Grants
No DE-SC0009800, No. DE-SC0009723, No. DE-SC0010296, No. DE-SC0010280,
No. DE-SC0011665, No. DEFG02-97ER41029, No. DE-FG02-96ER40956, No.
DEAC52-07NA27344, No. DE-C03-76SF00098 and No. DE-SC0017987. Fer-
milab is a U.S. Department of Energy, Office of Science, HEP User Facility.
Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under
Contract No. DE-AC02-07CH11359. Additional support was provided by the
Heising-Simons Foundation and by the Lawrence Livermore National Labora-
tory and Pacific Northwest National Laboratory LDRD offices.
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