Abstract Details
| status: | file name: | submitted: | by: |
|---|---|---|---|
| approved | rsae-1.pdf | 2019-02-22 14:12:19 | Yahui Wang |
| approved | rsae.pdf | 2019-02-22 14:11:37 | Yahui Wang |
Abstracts
Author: Yahui Wang
Requested Type: Poster
Submitted: 2019-02-22 14:07:39
Co-authors: N. Gorelenkov, W. Guo, N. Xiang
Contact Info:
Princeton Plasma Physics Lab
100 Stellarator Rd
Plainsboro, New Jersey 08536
United States
Abstract Text:
Several independent simulations were bechmarked to understand the
fast-ion driven plasma transport due to Alfvenic eigenmodes in the
linear regimes {[}Taimourzadeh et al., Nucl. Fusion (2019) submitted{]}.
The total growth rates of the Reversed Shear Alfven Eigenmodes (RSAE)
show reasonable agreement between the gyrokinetic codes and NOVA-K
at low to medium toroidal mode numbers, n= 2 - 4. But they start to deviate
from NOVA-K code results at n > 4. There are two damping mechanisms
neglected by NOVA-K in those simulation, which are radiative damping
and continuum damping. In this presentation we focus on the radiative
damping, which is one of the most important damping mechanisms for
present day tokamaks (such as DIII-D) and future burning plasmas.
We develop a new module for NOVA-K code to compute the radiative damping of RSAEs in NOVAK code. The results show that the radiative damping can not significantly reduce the total growth rate of the RSAE mode in NOVAK. Fast particles contribute to the total radiative damping at the same level as thermal particles due to their large Larmor and high pressure which is comparable to the thermal ion pressure.
We note that the ignored continuum damping could be important
for the balance of the total growth rate and need to investigated
further
Comments:
