![]() The π-mesons then decay into pairs, each comprising a muon and muon neutrino, during the flight in a 100-m-long tunnel (decay volume). Magnetic horns are magnets designed to focus charged π-mesons by applying a few hundred thousand amperes of pulsed current synchronized with each beam shot. Among these particles, the positively charged π-mesons -the parents of muon neutrinos- converge in the forward direction under the effect of magnetic horns. At the target station the protons collide with a target composed of graphite rods and produce numerous daughter particles. The proton beams emitted by the Main Ring synchrotron are directed westward through the primary beam line, where many normal-conducting / super-conducting magnets and beam monitors are placed along the trajectory. In More Detail J-PARC Neutrino Facility: Source of the World's-highest Intense Neutrino Beam ![]() Because a neutrino penetrates almost everything (e.g., rocks) with very little interactions, it is very difficult to be detected. Neutrino is one of the most basic building blocks of universe - elementary particles -, which has a very tiny mass compared to other elementary particles, and are thought to be three types - flavors. The data collection in the T2K experiment commenced in January, 2010. The construction of the facility began in 2004 and was completed in March, 2009. The facility was designed and realized by the High Energy Accelerator Research Organization (KEK) with a major contribution from the T2K international collaboration. J-PARC Neutrino Experimental Facility has been built to carry out forefront neutrino research using the world's highest intensity neutrino beam. What is J-PARC Neutrino Experimental Facility?
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