Measurement of total ion current from vacuum arc plasmasources

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The total ion current generated by a vacuum arc plasma source was measured. The discharge system investigated allowed ion collection from the arc plasma streaming through a hemispherical mesh anode with geometric transparency of 72 percent. A range of different cathode materials was investigated, and the arc current was varied over the range 50-500 A. We find that the normalized ion current (Iion/Iarc) depends on the cathode material, with values in the range from 5 percent to 19 percent and generally greater for elements of low cohesive energy. The application of a strong axial magnetic field in the cathode and ... continued below

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Oks, Efim M.; Savkin, Konstantin P.; Yushkov, Georgiu Yu.; Nikolaev, Alexey G.; Anders, A. & Brown, Ian G. July 1, 2005.

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Description

The total ion current generated by a vacuum arc plasma source was measured. The discharge system investigated allowed ion collection from the arc plasma streaming through a hemispherical mesh anode with geometric transparency of 72 percent. A range of different cathode materials was investigated, and the arc current was varied over the range 50-500 A. We find that the normalized ion current (Iion/Iarc) depends on the cathode material, with values in the range from 5 percent to 19 percent and generally greater for elements of low cohesive energy. The application of a strong axial magnetic field in the cathode and arc region leads to increased normalized ion current, but only by virtue of enhanced ion charge states formed in a strong magnetic field.

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  • International Conference on Ion Sources(ICIS'05), Caen, France, September 12-16, 2005

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  • Report No.: LBNL--58199
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 891026
  • Archival Resource Key: ark:/67531/metadc884045

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  • July 1, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Sept. 30, 2016, 3:45 p.m.

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Oks, Efim M.; Savkin, Konstantin P.; Yushkov, Georgiu Yu.; Nikolaev, Alexey G.; Anders, A. & Brown, Ian G. Measurement of total ion current from vacuum arc plasmasources, article, July 1, 2005; (digital.library.unt.edu/ark:/67531/metadc884045/: accessed October 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.