The Status Report of the LNPI 1 GeV Synchrocyclotron
In this paper I represent the big group of people from Leningrad who had constructed the biggest synchrocyclotron. The accelerator is located at Gatchina, 45 km from Leningrad in the Nuclear Physics Institute Academy of Sciences USSR. The first beam was obtiined in November 1967. After that we had many troubles with one RF system, and 1 GeV synchrocyclotron came into operation in April 1970. The machine schedule now has 120 hours of operation per week in average for an e.xperimental program with beams. As distinct from the other synchrocyclotrons the machine has the highest efficiency of an extraction system (25 30%) wlhich allows to have intensity of proton beam about 1012 p/s and t,o minimize induced radioactivity problems inside the accelerator itself because internal accelerated beam intensity is 0.5 PA.