The ADMX ultra-low noise receiver
ORAL
Abstract
The Axion Dark Matter eXperiment (ADMX) searches for dark-matter axions by looking for their resonant conversion to microwave photons in a strong magnetic field. Given the current experimental setup the axion-photon conversion power is expected to be below a yoctowatt. Detecting such feeble signals above the thermal and electronic noise background requires a very sensitive microwave receiver. To ensure a fully characterized data pipeline, synthetic axion waveforms are simulated and periodically injected through the cavity and receiver chain. Here I discuss the calibration of the ADMX receiver and real-time analysis performed by the DAQ.
*DOE Grants DE-FG02-97ER41029, DE-FG02-96ER40956, DE-AC52-07NA27344, DE-AC03-76SF00098, NSF Grant 1067242, and the Livermore LDRD program.
–