The Water Cherenkov Test Experiment (WCTE) is an experiment proposed at CERN to measure the response of a Detector for charged particles such as π ±, p+, e±, etc. data obtained from WCTE will be used in future neutrino experiments. consists sealed cylindrical tank filled with ultrapure water. 128 multi-PhotoMultiplier Tubes (mPMTs) are mounted on support structure facing inwards map out radiati...

Antineutrinos are an inextricable element of the fission process. The kiloton-scale KamLAND experiment has demonstrated a capability to detect reactor antineutrinos at range few hundred kilometers. But or rule out existence single small over many kilometers requires large detector, so in fact that optical opacity detection medium itself becomes important factor. If detector is photons cannot tr...

The aim of this paper is to study the fine structure of the Cherenkov rings. We analyze the experiments performed by one of authors (Zrelov) in which no special focusing devices were used. The broad Cherenkov ring was observed in the plane perpendicular to the motion axis. Using the exact and approximate formulas we investigate how a charge moving uniformly in a medium radiates in a finite spac...

We demonstrate that the detection of shock modulations of the neutrino spectra from a galactic core-collapse supernova is sufficient to obtain a high significance determination of the neutrino mass hierarchy if the supernova event is observed in both a Mton-class water Cherenkov detector and a 100 kton-class liquid argon detector. Neither detailed supernova neutrino flux modelling nor observati...

Milagrito, a large, covered water-Cherenkov detector, was the world's "rst air-shower-particle detector sensitive to cosmic gamma rays below 1 TeV. It served as a prototype for the Milagro detector and operated from February 1997 to May 1998. This paper gives a description of Milagrito, a summary of the operating experience, and early results that demonstrate the capabilities of this technique....

The search for high energy neutrinos of astrophysical origin is being conducted today with two water/ice Cherenkov experiments. New instruments of higher performance are now in construction and more are in the R&D phase. No sources have been found to date. Upper limits on neutrino fluxes are approaching model predictions. Results are reported on the search for point sources, diffuse fluxes, gam...

The operation of CsI photocathodes in gaseous detectors requires special attention to the purity of the applied gas mixtures. We have studied the influence of oxygen and water vapour contaminations on the performance of CsI photocathodes for the ALICE HMPID RICH prototype. Measurements were done through comparison of Cherenkov rings obtained from beam tests. Increased levels of oxygen and water...

The Milagro Gamma-Ray Observatory, located at an altitude of 2630m in the mountains of northern New Mexico, is a water-Cherenkov extensive air shower detector consisting of a 4800m covered pond instrumented with 723 PMTs. For improved sensitivity, 175 instrumented water tanks have recently been added surrounding the pond, covering an area of 40, 000m. Milagro continuously observes the entire ov...