DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 26: Commonality of Density Threshold for RMP ELM Suppression and QH-mode | ||
| Name: | Mickey R. Wade ( |
Affiliation: | General Atomics |
| Research Area: | ELM Control & Pedestal Physics | Presentation time: | Not requested | Co-Author(s): | -- |
| Description: | Compare the density threshold at which QH-mode and RMP ELM suppression is achieved in same plasma shape | ||
| Experimental Approach/Plan: | Establish q95 ~ 3.7 QH-mode plasma in a plasma shape amenable to RMP ELM suppression. Determine density threshold for ELM suppression. Establish q95 ~ 3.7 ELM suppressed plasma in same plasma shape. Determine density threshold for ELM suppression. | ||
| Background: | Both QH-mode and RMP ELM suppressed discharges are obtained at very low density (or collisionality) with particle transport drastically affected by the non-axiymettric fields in the edge, suggesting a commonality in the physics involved. Theory suggests that the density plays a role in determining the operating point on the peeling-ballooning diagram, pushing the most unstable mode to be more kink-like. | ||
| Resource Requirements: | -- | ||
| Diagnostic Requirements: | -- | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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