Speaker
Nicholas Rapidis
(UC Berkeley)
Description
The Haloscope At Yale Sensitive To Axion CDM (HAYSTAC) utilizes a tunable resonant microwave cavity to search for dark matter axions. In this talk, we will present an overview of the operational details and results from Phase I of the HAYSTAC experiment. This phase relied on a 9.4 T magnet, Josephson parametric amplifiers, and a dilution refrigerator for the operation of the experiment. Axion models with two photon coupling $g_{a\gamma\gamma}\geq 2\times 10^{-14}\ \text{GeV}^{-1}$ were excluded in the $ 23.15 < m_a<24.0\ \mu\mathrm{eV}$ mass range. Improvements for Phase II of the experiment will also be presented, which include upgrades to the cryogenics system, a new squeezed-state receiver system. Finally, work on multi-rod cavities and photonic band gap resonators for higher frequency operation will be discussed.
This work was supported by the National Science Foundation, under grants PHY-1362305 and PHY-1607417, by the Heising-Simons Foundation under grants 2014-181, 2014-182, and 2014-183, and by the U.S. Department of Energy through Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. Nicholas Rapidis is supported by the Haas Scholars Program.
Primary author
Nicholas Rapidis
(UC Berkeley)
