Physics
Scientific paper
Apr 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000nimpa.444...51a&link_type=abstract
Nuclear Instruments and Methods in Physics Research Section A, Volume 444, Issue 1-2, p. 51-54.
Physics
6
Scientific paper
We report recent progress in the development of HERON, a detector of low-energy solar neutrinos that will use as a target material 10 tons of liquid helium. The HERON detector is intended to detect p-p neutrinos from the sun in real time with a an energy threshold of approximately 50keV. The recoil energy of electrons resulting from the elastic scattering of neutrinos is measured with calorimetric wafers above the free surface of the liquid at 40mK. Both the EUV scintillation and the helium atoms produced by quantum evaporation, which result from phonos and rotons hitting the free surface, are detected by the wafers. Background rejection is achieved statistically by a determination of event location with respect to the walls of the helium containment. The wafers will be used to form a coded aperture array. If the wafers have an energy threshold such that they can detect single 16eV photons, a neutrino event having a recoil electron with an energy greater than 50keV could be located to within 10cm or better anywhere in the 10tons of helium.
Adams Joseph S.
Fleischmann Andreas
Huang Ying-Hua
Kim Yeon Han
Lanou Robert E.
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