A bolometric millimeter-wave system for observations of anisotropy in the cosmic microwave background radiation on medium angular scales

Authors :: Fischer, M. L
Alsop, D. C
Cheng, E. S
Clapp, A. C
Cottingham, D. A
Gundersen, J. O
Koch, T. C
Kreysa, E
Meinhold, P. R
Lange, A. E
Source :: NASA. Goddard Space Flight Center, Goddard Visiting Scientist Program for the Space and Earth Sciences Directorate.
Publication Year :: 1992
Publisher :: United States: NASA Center for Aerospace Information (CASI), 1992.
Abstract: We report the performance of a bolometric system designed to measure the anisotropy of the cosmic microwave background (CMB) radiation on angular scales from 0 deg 3 min to 3 deg. The system represents a collaborative effort combining a low-background 1 m diameter balloon-borne telescope with new multimode feed optics, a beam modulation mechanism with high stability, and a four-channel bolometric receiver with passbands centered near frequencies of 3 (90), 6 (180), 9 (270), and 12 (360) cm(exp -1) (GHz). The telescope was flown three times with the bolometric receiver and has demonstrated detector noise limited performance capable of reaching sensitivity levels of Delta(T)/T(sub CMB) is approximately equal to 10(exp -5) with detectors operated at T = 0.3 K.

Language :: English
Database :: NASA Technical Reports
Journal :: NASA. Goddard Space Flight Center, Goddard Visiting Scientist Program for the Space and Earth Sciences Directorate
Publication Type :: Report
Accession number :: edsnas.19930009528
Document Type :: Report

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