Development of a gas-fed plasma source for pulsed high-density plasma/material interaction studies

Michael V. Pachuilo, Francis Stefani, Laxminarayan L. Raja, Roger D. Bengtson, Graeme A. Henkelman, A. Cuneyt Tas, Waltraud M. Kriven, Kumar Sinha Suraj

Research output: Contribution to journalArticlepeer-review


A gas-fed capillary plasma 2Please provide the full name for the author 'A. Cuneyt Tas.' source has been developed to study plasma-surface interactions under pulsed high pressure arc conditions, without the use of an exploding fuse wire or ablative liner. A nonintrusive preionization source has been developed to break down relatively large interelectrode gaps at low charge voltages of 2-6 kV. The preionization source comprises a nonequilibrium surface streamer discharge that forms a conducting channel through which the main thermal arc discharge is initiated. The arc electron temperature and number density are estimated to be (Te ∼ 1-2 eV and (ne ∼ 1023m-3. Silicon and sapphire samples were exposed to the arc plasma and revealed deposition of electrode and wall materials. Substitution of Elkonite 50W3 for brass electrodes reduced plasma contamination to acceptable levels. The plasma-material interactions were examined and quantified using scanning electron microscopy and energy dispersive X-ray spectroscopy.

Original languageEnglish (US)
Article number6877676
Pages (from-to)3245-3252
Number of pages8
JournalIEEE Transactions on Plasma Science
Issue number10
StatePublished - Oct 1 2014


  • Arc discharge
  • atmospheric discharge
  • capillary discharge
  • plasma-material interaction
  • pulsed thermal plasma

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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