Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

CAPP’s axion data with mass range from 2.45 to 2.75 GHz

Jul 5, 2018, 9:20 AM
20m
105 (COEX, Seoul)

105

COEX, Seoul

Parallel Dark Matter Detection Dark Matter Detection

Speaker

Woohyun Chung (Center for Axion and Precision Physics Research, IBS)

Description

CAPP’s flagship axion experiment, CULTASK, employs dilution refrigerators to lower the physical temperature of resonant cavities to less than 40 mK - the coldest ever for axion search. We prepared a complete set of the microwave axion detector (CAPP-PACE) equipped with an 8 T superconducting magnet with 12 cm inner bore in order to search for axions with mass around 2.5 GHz. The frequency tuning system installed in a split-design resonant cavity with a high Q-factor utilizes piezoelectric actuators with interchangeable sapphire and copper rods and performs flawlessly in searching a wide range of axion mass. The feeble signal ($~10^{-24}$ W) from the cavity is amplified and transmitted through the RF receiver chain, specially designed to minimize the noise temperature of the system employing an 1 K HEMT or a quantum-limited SQUID (Superconducting Quantum Interference Device) amplifier in order to raise the sensitivity and eventually speed up the axion search. I will present the results of CAPP’s first physics data runs in the axion mass range from 2.45 to 2.75 GHz and discuss our future plans and R&D projects.

Primary authors

Woohyun Chung (Center for Axion and Precision Physics Research, IBS) Dr Yannis Semertzidis (CAPP/IBS and KAIST in South Korea) Dr Ohjoon Kwon (IBS/CAPP) Mr Doyu Lee (Center for Axion and Precision Physics Research, IBS) Mr Danho Ahn (IBS/CAPP, KAIST) Mr Jinsu Kim (IBS/CAPP, KAIST) Mr Caglar Kutlu (IBS/CAPP, KAIST)

Presentation materials