Astronomy and Astrophysics – Astronomy
Scientific paper
May 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21631803m&link_type=abstract
American Astronomical Society, AAS Meeting #216, #318.03; Bulletin of the American Astronomical Society, Vol. 41, p.907
Astronomy and Astrophysics
Astronomy
Scientific paper
The Q/U Imaging ExperimenT (QUIET) is a cosmic microwave background polarization experiment operating from the Chajnantor Testbed Facility on Chile's Atacama plateau. QUIET's science goals are to make precise measurements of the CMB E-mode power spectrum and to detect or place limits on the CMB B-mode polarization. QUIET's primary technical goal is to demonstrate new, fully integrated and miniaturized pseudo-correlation polarimeter modules that use InP-based high electron mobility transistor (HEMT) amplifiers. It reuses the Cosmic Background Imager's 3-axis mount in combination with a 1.4 meter side fed Dragonian telescope to generate 27' and 12.7' FWHM beams at Q-band (43 GHz) and W-band (93 GHz), respectively. QUIET's 19 element Q-band polarimeter and 91 element W-band polarimeter represent the largest HEMT-based focal plane arrays ever deployed. The Q-band system operated from October 2008 until May 2009 and the W-band system has been operating since June 2009 and continues to operate. We'll describe the QUIET system and provide a brief summary of its current results.
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