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DUMAND II, recently funded, will have more than 20 times the area of any existing detector and a mass of almost 2 million tons this size is minimal for the intensities and cross sections anticipated. Over a dozen collaborating groups have contributed to the successful construction and operation of DUMAND I, the SPS or Short Prototype String, which established the benign character of the ocean environment and demonstrated its suitability for DUMAND II, a 216-phototube array now under construction.
#NEUTRINO TELESCOPES SERIES#
It survived through a series of summer conferences until it was funded as a feasibility study in 1979 and established in the Hawaii DUMAND Center, at the University of Hawaii. The paper is concerned with the physics, technology, and history of the project, which started informally in 1973. Potential sources of high-energy neutrinos are listed, and estimates of neutrino intensity given. At present under construction, it hopes to inaugurate the field of high-energy neutrino astronomy. Comment: 19 pages, 26 figures, REVTeX 4ĭUMAND is a project to build a Deep Underwater Muon And Neutrino Detector offshore near the island of Hawaii. With a second generation of neutrino detectors, these demanding requirements can be relaxed considerably. We find that, with the presently planned neutrino detectors (ANITA, Auger, EUSO, OWL, RICE, and SalSA) operating in the relevant energy regime above 10^ >~ 0.1 eV for the lightest neutrino. As a by-product, we study the prospects to infer the absolute neutrino mass scale. We investigate the possibility of determining the existence of the cosmic neutrino background within the next decade from a measurement of these absorption dips in the neutrino flux. Their depths are determined by the cosmic neutrino background density, by the cosmological parameters determining the expansion rate of the universe, and by the large redshift history of the cosmic neutrino sources. The high-energy edges of these dips are fixed, via the resonance energies, by the neutrino masses alone. Resonant annihilation of extremely high-energy cosmic neutrinos on big-bang relic anti-neutrinos (and vice versa) into Z-bosons leads to sizable absorption dips in the neutrino flux to be observed at Earth.