Effects of the extraction voltage applied by the puller-electrode on the H- Extraction in the Linac4 negative ion source

S. Abe, S. Nishioka, S. Mattei, Akiyoshi Hatayama, J. Lettry

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In order to understand the H- extraction mechanism and investigate the effect of the extraction voltage applied by the puller-electrode on the H- extraction in the Linac4 negative ion source, we are developing a 2D3V-PIC (two dimensions in the real space and three dimensions in the velocity space, Particle in Cell) model with volume produced H- ions. It is shown that how to take the magnetic filter field direction is important for the 2D modeling to take into account the important 3D effect of electron ExB drift. It is also shown that the meniscus formation is not symmetric due to the electron ExB drift in the extraction region and the divergence of the H- beam is asymmetric. In order to make more quantitative comparison of the extracted H- and electron currents with the experiments and 3D modeling, further improvements, especially the electron loss along the magnetic filter field line will be needed.

Original languageEnglish
Title of host publication5th International Symposium on Negative Ions, Beams and Sources, NIBS 2016
PublisherAmerican Institute of Physics Inc.
Volume1869
ISBN (Electronic)9780735415492
DOIs
Publication statusPublished - 2017 Aug 9
Event5th International Symposium on Negative Ions, Beams and Sources, NIBS 2016 - Oxford, United Kingdom
Duration: 2016 Sep 122016 Sep 16

Other

Other5th International Symposium on Negative Ions, Beams and Sources, NIBS 2016
CountryUnited Kingdom
CityOxford
Period16/9/1216/9/16

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Abe, S., Nishioka, S., Mattei, S., Hatayama, A., & Lettry, J. (2017). Effects of the extraction voltage applied by the puller-electrode on the H- Extraction in the Linac4 negative ion source. In 5th International Symposium on Negative Ions, Beams and Sources, NIBS 2016 (Vol. 1869). [030051] American Institute of Physics Inc.. https://doi.org/10.1063/1.4995771