Further development of low noise MEVVA ion source

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Based on the idea of a space-charge-limited mode of operation, the influence of a pair of electrostatic meshes on the beam parameters of the LBNL MEVVA-5 ion source was investigated. The meshes were placed in the expansion zone of the vacuum arc plasma. Apart from reducing the level of beam current fluctuations, this mode of operation provides significant control over the ion charge state distribution of the extracted beam. These effects can be understood taking not only space charge but also the high-directed ion drift velocities into account that are the same for different ion charge states of a material. ... continued below

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10 pages

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Oks, Efim; Yushkov, George; Litovko, Irina; Anders, Andre & Brown, Ian August 28, 2001.

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Description

Based on the idea of a space-charge-limited mode of operation, the influence of a pair of electrostatic meshes on the beam parameters of the LBNL MEVVA-5 ion source was investigated. The meshes were placed in the expansion zone of the vacuum arc plasma. Apart from reducing the level of beam current fluctuations, this mode of operation provides significant control over the ion charge state distribution of the extracted beam. These effects can be understood taking not only space charge but also the high-directed ion drift velocities into account that are the same for different ion charge states of a material. The results of simulations of the processes involved are in good agreement with the experimental results.

Physical Description

10 pages

Notes

OSTI as DE00788041

Source

  • 9th International Conference on Ion Sources (ICIS 01), Oakland, CA (US), 09/03/2001--09/07/2001

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  • Report No.: LBNL--47843
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 788041
  • Archival Resource Key: ark:/67531/metadc718739

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  • August 28, 2001

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 4, 2016, 1:01 p.m.

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Oks, Efim; Yushkov, George; Litovko, Irina; Anders, Andre & Brown, Ian. Further development of low noise MEVVA ion source, article, August 28, 2001; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc718739/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.