Computer Science – Performance
Scientific paper
Nov 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phdt.......169k&link_type=abstract
Thesis (PhD). UNIVERSITY OF HAWAII, Source DAI-B 58/05, p. 2487, Nov 1997, 159 pages.
Computer Science
Performance
Scientific paper
The search for new high energy neutrino sources beyond the sun dictates construction of a 1 km3 scale, mature and well-calibrated detector. A water Cerenkov detector, the Deep Underwater Muon and Neutrino Detector (DUMAND) was planned as an initial stage for such a 1 km3 detector. It was intended to detect upward-going muons produced by interactions of neutrinos of astrophysical origin with nine instrumented strings equipped with 24 optical sensors each and to be operated in deep ocean. The quality of DUMAND is discussed first with the results of two major calibrations of the detector. Since the proposed water Cerenkov technique requires an accurate knowledge of the optical sensors, an intense calibration was carried out for them. The results are presented, along with the main elements of the water Cerenkov technique. A fully integrated string has been operated on land for one year to test its capability and reliability. The results are discussed with respect to its data acquisition capability, i.e., the photodetection, data processing, transmission and selection performed by detector components. An initial DUMAND instrumented string was deployed in the deep ocean (~4.8 km of depth), 36 km off the Island of Hawaii in December, 1993. The detector was operated for three hours on site and data was obtained at the time of shore cable laying. With the results of data analysis, the detector performance in the deep ocean and characteristics of ambient light at the site, including its effects on the detector, are described. A Monte Carlo simulation was carried out to study applicability of the system developed by the DUMAND group to a 1 km3 detector in the deep ocean. A configuration is proposed to achieve 1 km2 effective detection area and /le 1o angular resolution for muons with TeV energies.
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