2731 K
211 pp.
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TitleFar Infrared Spectrometry of the Cosmic Background Radiation
Author(s)Mather, J. C.
Publication DateJanuary 1974
Report NumberLBL--2258
Unique IdentifierACC0461
Other NumbersOSTI ID: 4309827
Research OrgUniversity of California Berkeley (USA); Lawrence Berkeley Lab (LBL) [Lawrence Berkeley National Laboratory (LBNL)
Contract NoW-7405-ENG-48
Sponsoring OrgU.S. Atomic Energy Commission (AEC)
Other InformationPh.D. Thesis
SubjectN56600 -- Physics (Astrophysics & Cosmology) -- Cosmology; Cosmology -- Background Radiation; Universe -- Infrared Radiation; Infrared Spectra; Radiation Detectors
KeywordsCosmic Radiation
Related Web PagesJohn C. Mather, the Big Bang, and the COBE
AbstractI describe two experiments to measure the cosmic background radiation near 1 mm wavelength. The first was a ground-based search for spectral lines, made with a Fabry-Perot interferometer and an InSb detector. The second is a measurement of the spectrum from 3 to 18 cm{sup -1}, made with a balloon-borne Fourier transform spectrometer. It is a polarizing Michelson interferometer, cooled in liquid helium, and operated with a germanium bolometer. I give the theory of operation, construction details, and experimental results. The first experiment was successfully completed but the second suffered equipment malfunction on its first flight. I describe the theory of Fourier transformations and give a new understanding of convolutional phase correction computations. I discuss for infrared bolometer calibration procedures, and tabulate test results on nine detectors. I describe methods of improving bolometer sensitivity with immersion optics and with conductive film blackening.
2731 K
211 pp.
View Document 

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