Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session TO07: Fundamental Plasmas: Elementary Plasma Processes and Diagnostics
9:30 AM–12:30 PM,
Thursday, October 20, 2022
Room: 401 ABC
Chair: Earl Scime, WVU
Abstract: TO07.00001 : Thermal Waves in an Inhomogeneous Magnetized Plasma Pressure Filament*
9:30 AM–9:42 AM
Presenter:
Scott Karbashewski
(University of California, Berkeley)
Authors:
Scott Karbashewski
(University of California, Berkeley)
Richard D Sydora
(Univ of Alberta)
Bart G Van Compernolle
(General Atomics - San Diego)
Matthew J Poulos
(Princeton Plasma Physics Laboratory)
More recent experiments have significantly improved the measurement technique and allowed access to the previously unstudied cross-field regime. The results reveal a complex cross-field structure that is shown to be due to thermal wave interference effects from the inhomogeneous structure of the filament. A classical mechanics approach is used to model the inhomogeneous thermal conductivity profile to accurately predict the observed thermal wave interference patterns and extract thermal conductivities. A comparison of the observations in quiescent and turbulent conditions demonstrates thermal waves may be used to distinguish between classical and anomalous transport regimes.
*Support acknowledged from the Natural Sciences and Engineering Research Council of Canada (NSERC), DOE, and NSFÂ Award No. AGS-9724366.
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