DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 85: Current driven RWM target discharges for feedback stabilization experiments | ||
| Name: | Gary Jackson ( |
Affiliation: | General Atomics |
| Research Area: | RWM Physics | Presentation time: | Not requested | Co-Author(s): | A. Garofalo, E. Strait, M. Okabayashi, Y. In |
| Description: | Develop a reproducible current driven RWM target discharge and then apply Icoil feedback stabilization. | ||
| Experimental Approach/Plan: | Scan dIp/dt, density, and possibly NB power to obtain a robust RWM target discharge. Apply feedback to stabilize the m/n=4/1 RWM and continue ramping current to obtain a 3/1 RWM | ||
| Background: | For several years, an important goal of DIII-D RWM research has been to obtain a reproducible RWM discharge to use in feedback stabilization studies. For various reasons this has proved to be a difficult task. In 2007, current driven RWMs were obtained during the current ramp phase of DIII-D. However there was no experimental time to assess how reliable these targets were, or to explore feedback stabilization. | ||
| Resource Requirements: | 0.5 day run time to develop the RWM target, then 0.5 day to evaluate RWM feedback stabilization | ||
| Diagnostic Requirements: | SXR profiles to differentiate between the current driven RWM and tearing modes. | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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