Speaker
Mr
Scott Kruger
(USA)
Description
We present integrated feedback simulations of neoclassical tearing modes in tokamak plasmas. The implementation relies on the NIMROD and GENRAY codes, along with new codes for calculating a local quasilinear operator, and for performing the code coupling. The mathematical formulation relies on the formulation of a third-order electron drift-kinetic equation that captures the bootstrap current effects and is consistent with ECCD-driven kinetic distortion effects such as the Fisch-Boozer and Ohkawa current drives. Numerically solving the drift-kinetic equation relies on a new high-order continuum discretization scheme suitable for solving the equation in the presence of a macroscopic three-dimensional magnetic field. Implementing these new kinetic closures implicitly, along with the drift-kinetic terms, provides many numerical challenges and requires careful verification.
Country or International Organization of Primary Author
United States
Primary author
Mr
Scott Kruger
(USA)
Co-authors
Dr
Dalton Schnack
(University of Wisconsin-Madison)
Dr
Eric Held
(Utah State University)
Dr
Jacob King
(Tech-X Corporation)
Dr
Jesus Ramos
(Massachusetts Institute of Technology)
Dr
Robert Harvey
(CompX Corporation)
Dr
Thomas Jenkins
(Tech-X Corporation)
