Time-evolved Resistive Wall Mode Calculations
Abstract
Resistive Wall Modes (RWM) are plasma kink instabilities that magnetically penetrate resistive structures, slowing their growth time from Alfvenic to the field penetration time of the resistive structures. The VALEN computer code [ Bialek, Physics of Plasmas, 8, 2170 (2001) ] can model RWM phenomena with arbitrary passive structures and a feedback system composed of active control coils and magnetic sensors. We report on VALEN time evolved calculations that simulate the behavior of the RWM in a variety of different tokamaks, including ITER, DIII-D, and NSTX.. The topics covered are: 1) frequency response calculations of the magnetic field from the control coils penetrating the passive structure, 2) Field Error Amplification confirming predictions from the single mode-lumped element model [ Boozer, Physics of Plasmas, 5, 3350 ( 1998) ] , and 3) predictions of time domain feedback performance that are consistent with VALEN
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- October 2003
- Bibcode:
- 2003APS..DPPFP1040B