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

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

doi:10.1063/1.4998683

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

Journal Article · Fri Aug 11 00:00:00 EDT 2017 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4998683· OSTI ID:1376436

^[1]; Martinez-Rodriguez, R. A. ^[2];

^[1];

^[1]; Winfrey, A. L. ^[3]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fusion and Materials for Nuclear Systems Division
Univ. of Puerto Rico, Mayaguez, PR (United States). Dept. of Mechanical Engineering
Univ. of Florida, Gainesville, FL (United States). Dept. of Materials Science and Engineering. Nuclear Engineering Program

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 in this paper 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. Finally, the tungsten target plate is analyzed for surface damage using a scanning electron microscope.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program

Contributing Organization:: Univ. of Puerto Rico, Mayaguez, PR (United States); Univ. of Florida, Gainesville, FL (United States)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1376436

Alternate ID(s):: OSTI ID: 1374783

Journal Information:: Journal of Applied Physics, Vol. 122, Issue 6; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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References (10)

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Dual laser holography for in situ measurement of plasma facing component erosion (invited) Biewer, T. M.; Sawyer, J. C.; Smith, C. D. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5039628	journal	October 2018
Surface Erosion of Plasma-Facing Materials Using an Electrothermal Plasma Source and Ion Beam Micro-Trenches Coburn, J. D.; Gebhart, T. E.; Parish, C. M. Fusion Science and Technology, Vol. 75, Issue 7 https://doi.org/10.1080/15361055.2019.1623570	journal	June 2019
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