15-20 October 2017
CERN
Europe/Zurich timezone

Metal Ion Filtering of Vacuum Arc Ion Source Through an Inclined-Aperture Extraction Grid

18 Oct 2017, 16:30
2h 30m
CERN

CERN

Centre international de Conférence Genève (CICG). http://www.cicg.ch/
Poster presentation Beam extraction, transport, and diagnostics Poster Session 3

Speaker

Dr Chaohui Lan (Institute of Fluid Physics, China Academy of Engineering Physics)

Description

The paper reports a novel method of increasing the fraction of H ion produced by vacuum arc ion sources with metal hydride cathodes, which applies the ionic selectivity of inclined-aperture extraction grid to separate and filter heavy metal ions. Since H ion and Ti ion produced by vacuum arc discharge have great differences in kinetic energy and mass-to-charge ratio, H ions are easy to pass through the inclined-aperture grid, while most of Ti ions are blocked and absorbed by the grid wall. Using a 2D particle-in-cell simulation, the ionic selectivity of inclined-aperture extraction grid is demonstrated. The numerical simulation results show that after ion filtering through the extraction grid, the fraction of H ion is increased from 39% to more than 80%. The increased amplitude of H ion fraction depends on the thickness of the grid.

Primary author

Dr Chaohui Lan (Institute of Fluid Physics, China Academy of Engineering Physics)

Co-authors

Dr Jidong Long (Institute of Fluid Physics, China Academy of Engineering Physics) Dr Jie Li (Institute of Fluid Physics, China Academy of Engineering Physics) Dr Le Zheng (Institute of Fluid Physics, China Academy of Engineering Physics) Dr Pan Dong (Institute of Fluid Physics, China Academy of Engineering Physics) Dr Yang Zhen (Institute of Fluid Physics, China Academy of Engineering Physics)

Presentation materials

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