Helicon and lower hybrid current drive comparisons in tokamak geometry
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23ja004_full.pdf
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Author(s)
Catto, Peter J.
Zhou, Muni
Date Issued
March 2023
Journal
Journal of Plasma Physics
Publisher
Cambridge University Press
Abstract
The parallel current driven by applied helicon waves is evaluated in tokamak geometry along with the radio frequency (rf) power absorbed by the passing electrons. The results are compared to the corresponding expressions for lower hybrid current drive. The efficiency of both current drive schemes is found to be the same in the single wave frequency, single mode number limit. The evaluation of the parallel currents is performed using an adjoint technique and tokamak geometry is retained by using an eigenfunction expansion appropriate for a transit averaged long mean free path treatment of electrons making correlated poloidal passes through the applied rf fields.
Description
Submitted for publication in Journal of Plasma Physics
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1017/s0022377823000569
