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Post Info TOPIC: Japan Proton Accelerator Research Complex
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Physicists see new identity-shifting behaviour in subatomic particles that could hold clues to origins of matter

Research from the UK and Japan indicates that subatomic particles called neutrinos may have a previously unseen form of identity-shifting property. Announced this week, these results could one day help scientists explain why the universe contains matter, but very little antimatter.
The new findings are the first from the T2K neutrino experiment in Japan and they show neutrinos changing between different types, or oscillating, in a third way where they had previously only been seen oscillating in two ways. Professor Dave Wark from the High Energy Physics group at Imperial College London leads the UK's involvement in the international experiment.
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Blobrana


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With 1st Neutrino Events, Multinational Team In Japan Takes 1st Step To Answering Why Only Matter In Universe
Physicists from the Japanese-led multi-national T2K neutrino collaboration announced today that over the weekend they detected the first neutrino events generated by their newly built neutrino beam at the J-PARC accelerator laboratory in Tokai, Japan. Protons from the 30-GeV Main Ring synchrotron were directed onto a carbon target, where their collisions produced charged particles called pions. These pions travelled through a helium-filled volume where they decayed to produce a beam of the elusive particles called neutrinos. These neutrinos then flew 200 metres through the earth to a sophisticated detector system capable of making detailed measurements of their energy, direction, and type. The data from the complex detector system is still being analysed, but the physicists have seen at least 3 neutrino events, in line with the expectation based on the current beam and detector performance.

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Blobrana


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Protons are successfully accelerated and transported to J-PARC Hadron Experimental Hall
A new milestone was set by the 50 GeV Synchrotron, which is the 3rd and the last stage of the accelerators of the Japan Proton Accelerator Research Complex (J-PARC), on January 27, 2009. Protons were accelerated up to 30 billion electron-volts (30 GeV), then successfully extracted to Hadron Experimental Hall in Nuclear and Particle Physics Facility and transported to the beam dump.
Since 2001, J-PARC has been jointly built by Japan Atomic Energy Agency (JAEA) and High Energy Accelerator Research Organization (KEK) at Tokai village in Ibaraki prefecture, Japan. The accelerator complex consisted of three stage, the LINAC, 3 GeV Synchrotron and 50 GeV Synchrotron, or the Main Ring.

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