Reconfiguration of an Electrothermal-Arc Plasma Source for In Situ PMI Studies

Conference · Fri Oct 01 00:00:00 EDT 2021 · Fusion Science and Technology

DOI:https://doi.org/10.1080/15361055.2021.1909989· OSTI ID:1833982

Lindquist, Elizabeth G. ^[1]; Gebhart III, Trey ^[2]; Elliott, Drew  ^[2]; Garren, Edward ^[2]; He, Zichen ^[2]; Kafle, Nischal ^[3]; Smith, Cary ^[2]; Thomas Jr, Tommy  ^[2]; Zinkle, Steven J. ^[2]; Biewer, Theodore  ^[2]

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1. University of Tennessee, Knoxville (UTK)
2. ORNL
3. No Affiliation

An electrothermal-arc plasma source (ET-Arc) has been developed to produce transient plasma heat and particle fluxes similar to those produced by edge localized modes onto divertor plasma-facing components in tokamaks. The ET-Arc utilizes a capacitive discharge to send current through a 4-mm-diameter, 9-cm-long capillary source liner. The liner material is ablated to form a high-velocity plasma jet that impacts the target downstream. With the current discharge circuit configuration, pulse lengths are 1 to 2 ms in duration and deliver heat fluxes of 0.25 to 2.1 GW m-2. The plasma was previously characterized with optical emission spectroscopy (OES) on helium emission lines. The He I line ratios were interpreted with collisional radiative analysis to calculate ne and Te. The electron temperature and electron density ranged from Te = 1 to 5 eV and ne = 1022 to 1028 electrons/m3, respectively.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1833982
• Journal Information: Fusion Science and Technology, Vol. 77, Issue 7-8; Conference: Technology of Fusion Energy (TOFE) - Chicago, Illinois, United States of America - 11/16/2020 5:00:00 AM-; ISSN 1536-1055
• Publisher: American Nuclear Society
• Country of Publication: United States
• Language: English