Material impacts and heat flux characterization of an electrothermal plasma source with an applied magnetic field

T. E. Gebhart, R. A. Martinez-Rodriguez, L. R. Baylor, J. Rapp, A. L. Winfrey

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

To produce a realistic tokamak-like plasma environment in linear plasma device, a transient source is needed to deliver heat and particle fluxes similar to those seen in an edge localized mode (ELM). ELMs in future large tokamaks will deliver heat fluxes of ∼1 GW/m2 to the divertor plasma facing components at a few Hz. An electrothermal plasma source can deliver heat fluxes of this magnitude. These sources operate in an ablative arc regime which is driven by a DC capacitive discharge. An electrothermal source was configured with two pulse lengths and tested under a solenoidal magnetic field to determine the resulting impact on liner ablation, plasma parameters, and delivered heat flux. The arc travels through and ablates a boron nitride liner and strikes a tungsten plate. The tungsten target plate is analyzed for surface damage using a scanning electron microscope.

Original languageEnglish (US)
Article number063302
JournalJournal of Applied Physics
Volume122
Issue number6
DOIs
StatePublished - Aug 14 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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