KEK Accelerator Facilities and Tristan Project

KEK 12 GeV PS continues stable operation and the maximum beam intensity has reached 4.1 x 1012 ppp, over twice of the design value. Since last June the booster delivers the 500 MeV protons to the Booster Synchrotron Utilization Facility (BSF), and pulsed neutrons and pulsed mesons are successfully produced. The 2.5 GeV electron linac and the storage ring, dedicated for a synchrotron radiation facility, will be completed in one year. The new version of TRISTAN plan has a 25 GeV electron ring and a 300 GeV proton ring. The e+-e- ring of 30 GeV will be constructed from FY 1981 as phase I of TRISTAN.