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Title: Status of the RF-driven H{sup −} ion source for J-PARC linac

For the upgrade of the Japan Proton Accelerator Research Complex linac beam current, a cesiated RF-driven negative hydrogen ion source was installed during the 2014 summer shutdown period, with subsequent operations commencing on September 29, 2014. The ion source has been successfully operating with a beam current and duty factor of 33 mA and 1.25% (500 μs and 25 Hz), respectively. The result of recent beam operation has demonstrated that the ion source is capable of continuous operation for approximately 1100 h. The spark rate at the beam extractor was observed to be at a frequency of less than once a day, which is an acceptable level for user operation. Although an antenna failure occurred during operation on October 26, 2014, no subsequent serious issues have occurred since then.
Authors:
; ; ; ; ; ;  [1]
  1. J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195 (Japan)
Publication Date:
OSTI Identifier:
22482958
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 87; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 43 PARTICLE ACCELERATORS; ANTENNAS; APPROXIMATIONS; BEAM CURRENTS; BEAMS; HYDROGEN IONS; ION SOURCES; J-PARC; LINEAR ACCELERATORS; OPERATION; SHUTDOWN