May 29, 2018 to June 3, 2018
Hyatt Regency Indian Wells Conference Center
US/Pacific timezone

Status and Future Plans for the HAYSTAC Experiment

May 29, 2018, 4:50 PM
South Foyer | Pinon Room (Hyatt Regency Indian Wells Conference Center)

South Foyer | Pinon Room

Hyatt Regency Indian Wells Conference Center

44600 Indian Wells Lane, Indian Wells, CA 92210, USA
Parallel DM Dark Matter


Prof. Karl van Bibber (University of California Berkeley)


HAYSTAC (Haloscope At Yale Sensitive To Axion CDM) is a microwave cavity experiment designed both as a data pathfinder and innovation test-bed, in the 3–12 GHz (12–50 $\mu$eV) mass range. The Phase I run program (2016–17) covered a small region of mass around 24 $\mu$eV, achieving a sensitivity in axion-photon coupling well into the range of realistic axion models for a standard halo density. With a tunable annular copper cavity of only 1.5 L volume in a 9 T superconducting magnet, HAYSTAC achieved a system noise temperature of only 2× the Standard Quantum Limit ($k_{B}T_{SYS} = h\nu$), an order of magnitude improvement over any other experiment; its extraordinary sensitivity owing to the first-ever use of Josephson Parametric Amplifiers (JPA) and a dilution refrigerator in a microwave cavity experiment. Currently, a 2-JPA squeezed-vacuum state receiver is being integrated into the experiment that will enable a significant speed up of data taking; commissioning will begin early summer. Innovations in microwave resonators will also be described, such as Photonic Band Gap structures to eliminate interference from unwanted TE-modes with the TM010-like mode of interest, which couples to the axion field.
E-mail [email protected]
Collaboration name HAYSTAC
Funding source 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.

Primary author

Prof. Karl van Bibber (University of California Berkeley)

Presentation materials