Recent successful commissioning of high-power mode at J-PARC 3-GeV rapid cycling synchrotron

The J-PARC (Japan Proton Accelerator Research Complex, Tokai, Japan) is a new facility with MW-class high power proton beams at both 3 GeV and 50 GeV. At the end of May 2008, the first neutron was produced successfully by proton-beam induced spallation reaction at the Materials and Life Science Experimental Facility (MLF). Furthermore, very recently, the facility succeeded in commissioning high-power operation. Its 3-GeV rapid cycling synchrotron (RCS) is said to have achieved a beam power of 210 kW for a period of 70 seconds at 25Hz, and 315kW-equivalent power in one-pulse operation. For more information, visit the Web page, http://j-parc.jp/index-e.html