Analysis of the H<SUP>-</SUP> ion emissive surface in the extraction region of negative ion sources - Archive ouverte HAL Access content directly
Conference Papers Year : 2012

Analysis of the H- ion emissive surface in the extraction region of negative ion sources

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1
N. Kameyama
  • Function : Author
T. Fukuyama
  • Function : Author
S. Wada
  • Function : Author
S. Kuppel
K. Tsumori
  • Function : Author
H. Nakano
  • Function : Author
A. Hatayama
  • Function : Author
K. Miyamoto
  • Function : Author
A. Fukano
  • Function : Author
M. Bacal
  • Function : Author
  • PersonId : 1064365

Abstract

To understand the plasma characteristics in the extraction region of negative H− sources is very important for the optimization of H− extraction from the sources. The profile of plasma density and electrostatic potential in the extraction region with and without extraction grid voltage are analyzed with a 2D particle in cell modeling of the NIFS-RD H− sources. The simulation results make clear the physical process forming a double ion plasma layer (which consists only of positive H and negative H− ions) recently observed in the Cs-seeded experiments of the NIFS-R&D source in the vicinity of the extraction hole and the plasma grid. The results also give a useful insight into the formation mechanism of the plasma meniscus and the H− extraction process for such double ion plasma.
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Dates and versions

hal-02893265 , version 1 (08-07-2020)

Identifiers

  • HAL Id : hal-02893265 , version 1

Cite

N. Kameyama, T. Fukuyama, S. Wada, S. Kuppel, K. Tsumori, et al.. Analysis of the H- ion emissive surface in the extraction region of negative ion sources. 14th International Conference on Ion Sources / Negative Ion Sources, Sep 2011, Giardini Naxos, Italy. pp.02A721. ⟨hal-02893265⟩
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