Abstract Details
Abstracts
Author: Wonjae Lee
Requested Type: Poster
Submitted: 2017-03-15 12:15:03
Co-authors: M. Dorf, M. Dorr, R. Cohen, D. Ghosh, J. Hittinger, M. Umansky, S. Krasheninnikov
Contact Info:
UC San Diego
9500 Gilman Dr.
La Jolla, CA 92093
United States
Abstract Text:
We present the current status of the 5D (3D configuration and 2D velocity space) version of COGENT, a full-f continuum gyrokinetic Vlasov-Poisson code. The COGENT code has been extended to 3D slab geometry from the original 4D (2D2V) code. The 5D COGENT code maintains compatibility with the original 4D code. As a verification study, we have performed simulations of the collisionless drift wave instability (universal instability). The electrostatic gyrokinetic equations for two kinetic species (ions and electrons) are solved self-consistently and coupled to the long-wavelength limit of the Poisson equation. The simulation results show the theoretical linear growth of a drift wave due to resonant wave-particle interactions in magnetized inhomogeneous plasmas. We also show the transition of the collisionless drift wave instability to the collisional drift wave instability using a Krook collision operator in COGENT. Finally, we demonstrate that the kinetic drift wave generates helical shapes of potential perturbation inside of blob-filamentary structures in tokamak plasmas.
Comments: