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

We had found radio-wave-reflection effect in rock salt for detection of an ultra-high energy neutrino (UHEν) which is generated in GZK processes in the universe. When an UHEν interacts with rock salt or ice as a detection medium, the energy converts to a thermal energy. Consequently, a temperature gives rise along an UHEν shower at the interaction location. The permittivity arises with respect to the temperature at ionization processes of the UHEν 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 UHEν. They could be used for detection media in which the UHEν 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 UHEν.