Effect of Coulomb collision on the negative ion extraction mechanism in negative ion sources

Nishioka, S.; Abe, S.; Hatayama, A.; Miyamoto, K.; Mattei, S.; Lettry, J.

doi:10.1063/1.4934206

Title: Effect of Coulomb collision on the negative ion extraction mechanism in negative ion sources

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Abstract

To improve the H{sup −} ion beam optics, it is necessary to understand the energy relaxation process of surface produced H{sup −} ions in the extraction region of Cs seeded H{sup −} ion sources. Coulomb collisions of charged particles have been introduced to the 2D3V-PIC (two dimension in real space and three dimension in velocity space particle-in-cell) model for the H{sup −} extraction by using the binary collision model. Due to Coulomb collision, the lower energy part of the ion energy distribution function of H{sup −} ions has been greatly increased. The mean kinetic energy of the surface produced H{sup −} ions has been reduced to 0.65 eV from 1.5 eV. It has been suggested that the beam optics of the extracted H{sup −} ion beam is strongly affected by the energy relaxation process due to Coulomb collision.

Authors:

Nishioka, S.; Abe, S.; Hatayama, A. ^[1]; Miyamoto, K. ^[2]; Mattei, S.; Lettry, J. ^[3]

Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522 (Japan)
Naruto University of Education, 748 Nakashima, Takashima, Naruto-cho, Naruto-shi, Tokushima 772-8502 (Japan)
CERN, 1211 Geneva 23 (Switzerland)

Publication Date:: Mon Feb 15 00:00:00 EST 2016

OSTI Identifier:: 22483025

Resource Type:: Journal Article

Journal Name:: Review of Scientific Instruments

Additional Journal Information:: Journal Volume: 87; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ANIONS; BEAM OPTICS; COLLISIONS; ENERGY SPECTRA; EV RANGE; ION BEAMS; ION SOURCES; KINETIC ENERGY; VELOCITY

Citation Formats


                    Goto, I., E-mail: goto@ppl.appi.keio.ac.jp, Nishioka, S., Abe, S., Hatayama, A., Miyamoto, K., Mattei, S., and Lettry, J. Effect of Coulomb collision on the negative ion extraction mechanism in negative ion sources.  United States: N. p., 2016. 
        Web.  doi:10.1063/1.4934206.

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                    Goto, I., E-mail: goto@ppl.appi.keio.ac.jp, Nishioka, S., Abe, S., Hatayama, A., Miyamoto, K., Mattei, S., & Lettry, J. Effect of Coulomb collision on the negative ion extraction mechanism in negative ion sources.  United States.  https://doi.org/10.1063/1.4934206

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                    Goto, I., E-mail: goto@ppl.appi.keio.ac.jp, Nishioka, S., Abe, S., Hatayama, A., Miyamoto, K., Mattei, S., and Lettry, J. 2016.  
        "Effect of Coulomb collision on the negative ion extraction mechanism in negative ion sources".  United States.  https://doi.org/10.1063/1.4934206.

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@article{osti_22483025,

  title        = {Effect of Coulomb collision on the negative ion extraction mechanism in negative ion sources},

  author       = {Goto, I., E-mail: goto@ppl.appi.keio.ac.jp and Nishioka, S. and Abe, S. and Hatayama, A. and Miyamoto, K. and Mattei, S. and Lettry, J.},

  abstractNote = {To improve the H{sup −} ion beam optics, it is necessary to understand the energy relaxation process of surface produced H{sup −} ions in the extraction region of Cs seeded H{sup −} ion sources. Coulomb collisions of charged particles have been introduced to the 2D3V-PIC (two dimension in real space and three dimension in velocity space particle-in-cell) model for the H{sup −} extraction by using the binary collision model. Due to Coulomb collision, the lower energy part of the ion energy distribution function of H{sup −} ions has been greatly increased. The mean kinetic energy of the surface produced H{sup −} ions has been reduced to 0.65 eV from 1.5 eV. It has been suggested that the beam optics of the extracted H{sup −} ion beam is strongly affected by the energy relaxation process due to Coulomb collision.},

  doi          = {10.1063/1.4934206},

  url          = {https://www.osti.gov/biblio/22483025},
  journal      = {Review of Scientific Instruments},

  issn         = {0034-6748},

  number       = 2,

  volume       = 87,

  place        = {United States},

  year         = {Mon Feb 15 00:00:00 EST 2016},

  month        = {Mon Feb 15 00:00:00 EST 2016}

}

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