Mathematics – Logic
Scientific paper
Aug 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phdt........14t&link_type=abstract
Thesis (PhD). PRINCETON UNIVERSITY, Source DAI-B 63/02, p. 839, Aug 2002, 153 pages.
Mathematics
Logic
1
Scientific paper
The small angular scale, or high ℓ, component of the Cosmic Microwave Background anisotropy spectrum contains cosmological information about the early universe. In particular, the angular power spectrum above ℓ ˜ 600 should be damped due to photon diffusion between hot and cold regions and due to averaging along the line of sight. Fluctuations and damping at these scales have already been discovered at 30 GHz. At these frequencies, however, contamination from point sources can interfere with interpretation of these results. This work describes the design, construction, and performance of a 150 GHz, four-element interferometer built specifically to probe ℓ > 1000 at frequencies where minimum point source contamination is expected. A new microwave channelizer and fully digital correlator are discussed in detail, and the performance during the first season of observation at a high Chilean site is examined.
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