Computer Science
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phdt........41w&link_type=abstract
Ph.D. Thesis Princeton Univ., NJ.
Computer Science
Bolometers, Cosmology, Galactic Radiation, Millimeter Waves, Radiometers, Cooling, Galactic Evolution, Magnetic Cooling, Mirrors, Radio Telescopes, Refrigerators, Sensitivity
Scientific paper
This thesis describes the design and construction of a bolometric radiometer operating at a wavelength of 1.2 millimeters. The goal of this experiment is to search for the millimeter wave radiation from primeval galaxies. The instrument's sensitivity, based upon laboratory measurements, is adequate to test models of galaxy formation that have an infrared bright period at high redshift. The bolometer is cooled by an adiabatic demagnetization refrigerator. The construction of the refrigerator, capable of cooling the detector to 50 mK and keeping it cold for over eight hours is detailed. The experiment is installed on the 7 meter radio telescope on Crawford Hill in Holmdel, New Jersey. The design of a feed mirror system compatible with the telescope is described. Particular attention was devoted to minimizing scattering of the beam; all mirrors are offset conics. Operation of the instrument should begin in the fall of 1992.
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