CAPP-8TB axion haloscope for a mass range of 6.62 - 7.03 μeV

CAPP-8TB is a microwave cavity axion search experiment at IBS/CAPP designed to be sensitive to cold dark matter axion within a significant mass range. The coupling signal from axions and virtual photons, is enhanced by a high Q factor cavity of 3.5 L volume placed at a cryogenic temperature around 50 mK. A superconducting magnet provides a stable 8 T static magnetic field, and a low noise HEMT amplifier for the first amplification of the signal guarantees less than 2 K of the effective noise temperature of the receiver chain. As a result, CAPP-8TB’s first phase run is expected to reach four times KSVZ sensitivity within three months for the 6.62 – 7.03 μeV axion mass range. Preliminary results from the first phase run as well as plans for the second phase run with a SQUID amplifier will be shown during the presentation.