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Title: Modification to the accelerator of the NBI-1B ion source for improving the injection efficiency

Minimizing power loss of a neutral beam imposes modification of the accelerator of the ion source for further improvement of the beam optics. The beam optics can be improved by focusing beamlets. The injection efficiencies by the steering of ion beamlets are investigated numerically to find the optimum modification of the accelerator design of the NBI-1B ion source. The beam power loss was reduced by aperture displacement of three edge beamlets arrays considering power loadings on the beamline components. Successful testing and operation of the ion source at 60 keV/84% of injection efficiency led to the possibility of enhancing the system capability to a 2.4 MW power level at 100 keV/1.9 μP.
Authors:
; ; ; ; ; ;  [1] ; ; ; ; ; ;  [2]
  1. Korea Atomic Energy Research Institute, Daejeon 34057 (Korea, Republic of)
  2. National Fusion Research Institute, Daejeon 34143 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22482981
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; ACCELERATORS; APERTURES; DESIGN; EFFICIENCY; FOCUSING; ION BEAMS; KEV RANGE 10-100; OPERATION; OPTICS; POWER LOSSES; TESTING