Speaker
MyeongJae Lee
(Institute for Basic Science (Korea))
Description
CULTASK is an experiment to search for the cosmic axions using resonant cavities, to detect photons in the 1-8 GHz range from axion conversion in a very high magnetic field and at an ultra low temperature due to the inverse Primakoff effect. The postulated power of these signal is very weak in the order of $10^{-24}$ W, therefore, a signal processing network was carefully designed in order to detect these signal with a high signal-to-noise ratio. The basic principle of the signal processing employs an RF transceiver with direct down-conversion to baseband and a fast digitizer to read the amplified signal in real time for further offline Fourier transformation. The performance of cryogenic amplifier chain, room temperature signal processing and the feasibility to use digitization with Fourier transform compared with employing spectrum analyzer will be presented.
Author
MyeongJae Lee
(Institute for Basic Science (Korea))
Co-authors
Soohyung Lee
(Institute for Basic Science)
Yannis Semertzidis
(CAPP/IBS and KAIST in South Korea)
Young-Im Kim
(Institute for Basic Science)
