Analysis of electron energy distribution function in the Linac4 H- source

S. Mochizuki, S. Mattei, K. Nishida, Akiyoshi Hatayama, J. Lettry

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Abstract

To understand the Electron Energy Distribution Function (EEDF) in the Radio Frequency Inductively Coupled Plasmas (RF-ICPs) in hydrogen negative ion sources, the detailed analysis of the EEDFs using numerical simulation and the theoretical approach based on Boltzmann equation has been performed. It is shown that the EEDF of RF-ICPs consists of two parts, one is the low energy part which obeys Maxwellian distribution and the other is high energy part deviated from Maxwellian distribution. These simulation results have been confirmed to be reasonable by the analytical approach. The results suggest that it is possible to enhance the dissociation of molecules and the resultant H- negative ion production by reducing the gas pressure.

Original languageEnglish
Article number02B108
JournalReview of Scientific Instruments
Volume87
Issue number2
DOIs
Publication statusPublished - 2016 Feb 1

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ASJC Scopus subject areas

  • Instrumentation

Cite this

Mochizuki, S., Mattei, S., Nishida, K., Hatayama, A., & Lettry, J. (2016). Analysis of electron energy distribution function in the Linac4 H- source. Review of Scientific Instruments, 87(2), [02B108]. https://doi.org/10.1063/1.4932322