Broadband Astronomical Observation enabled by Analog Integrated Circuits Technology
Speaker: Kah Wuy Chin
AbstractThe evolution of galaxy clusters will provide various information to reveal the evolution of the large scale structure of the universe. Sunyaev-Zel’dovich effect (SZ effect) is a broadband spectral distortion of the cosmic microwave background due to inverse Compton scattering of CMB photons by free electrons in hot plasma of a galaxy cluster. The mass and the proper motion of a galaxy cluster can be clarified by SZ effect observation, which requires very wide field of view (about a few arcmin) and very wide bandwidth spectral observation (from 100 GHz until 900 GHz). These requirements could not be satisfied by consisting observation equipments; a camera has wide field of view but cannot get the spectral information, and heterodyne receiver has little field of view and has very narrow bandwidth. Planar frequency filters which can be made on detector chip using analog integrated circuits technology, and these filters enable dividing several colors and detecting them individually. I will introduce these new technologies that will be used in a novel camera which can take 3 colors on a detector chip.