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Title: Hydrogen negative ion production in a 14 GHz electron cyclotron resonance compact ion source with a cone-shaped magnetic filter

The plasma electrode structure of a 14 GHz ECR ion source was modified to enlarge the plasma volume of low electron temperature region. The result shows that the extracted beam current reached about 0.6 mA/cm{sup 2} with about 40 W microwave power. To investigate the correlation between the volume of the low electron temperature region and the H{sup −} current, a vacuum ultraviolet (VUV) spectrometer had been installed to observe light emission in the VUV wavelength range from the plasma. From the results of the negative ion beam current and that from VUV spectrometry, production rate of vibrationally excited hydrogen molecule seems to be enhanced by increasing the volume of low electron temperature region.
Authors:
; ;  [1] ;  [2] ;  [3] ; ;  [4] ;  [5]
  1. Graduate School of Engineering, Doshisha University, Kyotanabe, Kyoto (Japan)
  2. School of Biomedical Sciences, Doshisha University, Kyotanabe, Kyoto (Japan)
  3. Novelion Systems Co. Ltd., Kyotanabe, Kyoto (Japan)
  4. National Institute for Fusion Science, Toki, Gifu (Japan)
  5. RIKEN SPring-8 Center, Sayo, Hyogo (Japan)
Publication Date:
OSTI Identifier:
22253586
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 2; Conference: ICIS 2011: 14. international conference on ion sources, Giardini-Naxos, Sicily (Italy), 12-16 Sep 2011; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ANIONS; BEAM CURRENTS; ECR ION SOURCES; ELECTRON CYCLOTRON-RESONANCE; ELECTRON TEMPERATURE; FAR ULTRAVIOLET RADIATION; MAGNETIC FILTERS; MICROWAVE RADIATION; VISIBLE RADIATION