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Title: Grating monochromator for electron cyclotron resonance ion source operation

Recently, we started to observe optical line spectra from an ECR plasma using a grating monochromator with a photomultiplier. The light intensity of line spectrum from the ECR plasma had a strong correlation with ion beam intensity measured by a magnetic mass analyzer. This correlation is a significant information for beam tuning because it allows the extraction of the desired ion species from the ECR plasma. Separation of ion species of the same charge to mass ratio with an electromagnetic mass analyzer is known to be an exceptionally complex process, but this research gives new insights into its simplification. In this paper, the grating monochromator method for beam tuning of a Hyper-ECR ion source as an injector for RIKEN azimuthal varying field (AVF) cyclotron is described.
Authors:
 [1] ; ; ; ; ;  [2] ; ;  [3] ;  [2] ;  [4] ;  [5] ;  [6]
  1. Center of General Education, Tokyo University of Science, Suwa, 5000-1 Toyohira, Chino Nagano 391-0292 (Japan)
  2. Center for Nuclear Study, University of Tokyo, 2-1 Hirosawa, Riken Campus, Wako Saitama 351-0198 (Japan)
  3. RIKEN Nishina Center for Accelerator-Based Science, Wako Saitama 351-0198 (Japan)
  4. (Japan)
  5. (China)
  6. Heavy Ion Cancer Therapy Center, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage Chiba 263-855 (Japan)
Publication Date:
OSTI Identifier:
22220542
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 84; Journal Issue: 7; Other Information: (c) 2013 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; CYCLOTRONS; DIFFRACTION GRATINGS; ECR ION SOURCES; ELECTRON CYCLOTRON-RESONANCE; ION BEAMS; MASS; MASS SPECTROMETERS; MONOCHROMATORS; PARTICLE BEAMS; PHOTOMULTIPLIERS; PLASMA; SPECTRA; VISIBLE RADIATION