An ultra-high-energy-neutrino detector using rock salt and ice as detection media for radar method

Journal Article · Mon Nov 12 00:00:00 EST 2012 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4763436· OSTI ID:22075780

Chiba, Masami; Kamijo, Toshio; Tanikawa, Takahiro; Yabuki, Fumiaki; Yasuda, Osamu; Akiyama, Hidetoshi; Chikashige, Yuichi; Kon, Tadashi; Shimizu, Yutaka; Utsumi, Michiaki; Fujii, Masatoshi ^[1]

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1. Graduate School of Science and Engineering, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji-shi, Tokyo 192-0397 (Japan)

We had found radio-wave-reflection effect in rock salt for detection of an ultra-high energy neutrino (UHE{nu}) which is generated in GZK processes in the universe. When an UHE{nu} interacts with rock salt or ice as a detection medium, the energy converts to a thermal energy. Consequently, a temperature gives rise along an UHE{nu} shower at the interaction location. The permittivity arises with respect to the temperature at ionization processes of the UHE{nu} shower which is composed of hadronic and electromagnetic multiplication processes. The irregularity of the refractive index in the medium for radio wave rises to a reflection. The reflection effect with a long attenuation length of radio wave in rock salt and ice would yield a new method to detect UHE{nu}. They could be used for detection media in which the UHE{nu} interacts with. We could find a huge amount of rock salt or ice over 50 Gt in a natural rock salt formation or Antarctic ice sheet. Radio wave transmitted into the medium generated by a radar system could be reflected by the irregularity of the refractive index at the shower. Receiving the reflected radio wave yields information about the UHE{nu}.

• OSTI ID: 22075780
• Journal Information: AIP Conference Proceedings, Vol. 1484, Issue 1; Conference: Conference on origin of matter and evolution of galaxies 2011, Wako (Japan), 14-17 Nov 2011; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ANTARCTIC REGIONS
COSMIC NEUTRINOS
EEV RANGE
EXTENSIVE AIR SHOWERS
ICE
IONIZATION
NEUTRINO DETECTION
NEUTRINO REACTIONS
PARTICLE INTERACTIONS
PERMITTIVITY
RADAR
RADIATION DETECTORS
RADIOWAVE RADIATION
REFLECTION
REFRACTIVE INDEX
SALT DEPOSITS
UNIVERSE