Sherwood 2015

Abstract Details

files Add files

status:file name:submitted:by:
approvedsherwood_meeting_abstract_draft_final.pdf2015-01-20 14:40:05Meng Li

Modeling of Continuum Absorption of Alfvenic Modes in a Torus

Author: Meng Li
Requested Type: Poster Only
Submitted: 2015-01-20 14:17:00

Co-authors: B. N. Breizman, L. J. Zheng

Contact Info:
Institute for Fusion Studies, The University of Te
The University of Texas, 1 Uni
Austin, Texas   78712
United States of Ame

Abstract Text:
This work presents a numerical analysis of continuum absorption in the Alfvenic frequency range. By introducing a source and a collisional dissipation term, we perform global simulation
across the Alfven continuum spectrum with the ideal MHD code AEGIS [L. J. Zheng and M. Kotschenreuther, J. Comp. Phys. 211, 748 (2006)]. We scan the frequency and calculate the power deposited by the source to reveal resonances associated with global modes and to evaluate the continuum damping rates for these modes. The adaptive grid used in AEGIS enables accurate resolution of Alfven continuum crossings. We illustrate this approach by revisiting our earlier
modeling of the MST experiments [M. Li, B. N. Breizman, L. J. Zheng, et al., Phys. Plasmas 21, 082505 (2014)]. The results demonstrate that the damping rates are minimal and the plasma response to the source is similar to the localized eigenmodes near the localized eigenfrequencies found in previous calculations.

for "Plasma Properties, Equilibrium, Stability, and Transport" section

March 16-18, 2015
The Courant Institute, New York University