News from KEK
The B-Factory at Japan’s High-Energy Accelerator Research Organization (KEK) has now stored 1.1 A of 8-GeV electrons and 1.5 A of 3.5-GeV positrons. The electron current is close to the formally approved maximum current, 1.2 A. Dose measurements were done around the experimental hall. Eight radiation monitors are directly connected to the beam interlock system of the facility. Two of them will be placed closer to the detector in the experimental hall to get the new approved limit, 2 A, after the summer shut down.
The Slow Positron Facility was using the KEK B-Factory linac to generate positrons. Another dedicated electron linac has been installed. The Nuclear Safety Technology Center inspected the 50-MeV electron linac on April 10. The formal approval for operation was given on April 22. The linac is used to produce 1.0E+8 slow positrons per second.
The Japan Atomic Energy Research Institute (JAERI) and KEK are corroborating to construct the Japan Proton Accelerator Research Complex (J-PARC). The second discussion meeting with JAERI radiation safety group and the KEK Radiation Science Center was held on May 12 to exchange information concerning radiation safety at J-PARC.
The 11th domestic workshop and training course on the Electron Gamma Shower (EGS4) code will be held on August 5-7 at the KEK Radiation Science Center.