Analysis Results from ADMX-G2 Run 1B
ORAL
Abstract
The Axion Dark Matter eXperiment (ADMX) collaboration has completed Run 1B, which tuned over axion masses 680-800 MHz (2.81-3.31 eV) with sensitivity to DFSZ (Dine-Fischler-Srednicki-Zhitnisky) couplings. We present the results from Run 1B and describe the advancements that were necessary to achieve such sensitivity. This talk will explain the analysis procedure and the techniques used to optimize signal to noise. High signal to noise was attained by maximizing the cavity quality factor and form factor, volume and magnetic field minimizing the system noise temperature. Critical to achieving such sensitivity is the usage of a Josephson Parametric Amplifier (JPA) and implementation of a dilution refrigerator operating near 150 mK.
*This work was supported by the U.S. Department of Energy through Grants Nos. DE-SC0009723, DE-SC0010296, DE-SC0010280, DE-SC0010280, DE-FG02-97ER41029, DE-FG02-96ER40956, DE-AC52- 07NA27344, and DE-C03-76SF00098. This presentation has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics. Additional support was provided by the Heising-Simons Foundation and by the LDRD offices of the Lawrence Livermore and Pacific Northwest National Laboratories.
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