DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 412: Pedestal Width dependence on Grad-B Direction | ||
| Name: | Anthony W Leonard ( |
Affiliation: | General Atomics |
| Research Area: | ELM Control & Pedestal Physics | Presentation time: | Not requested | Co-Author(s): | R. Groebner, T. Osborne, P. Snyder |
| Description: | Determine the effect of Grab-B drift direction on the pedestal width | ||
| Experimental Approach/Plan: | Reproduce the hybrid beta scan in LSN. Carry out similar beta scan but in USN with same toroidal field direction. Compare this to the case where there was not change in pedestal in USN vs. LSN. Systematically remove differences between these two scans to determine the controlling physics. | ||
| Background: | A number of beta scans in hybrid, or other high triangularity, configurations, has indicated that for the unfavorable Grad-B drift direction the pedestal density, and usually the pedestal pressure, is lower. This experiment will isolate the physical parameters controlling this scaling and determine if it comes primarily through a change in the pedestal width. | ||
| Resource Requirements: | USN and LSN high triangularity configurations. 5 co-NBI sources | ||
| Diagnostic Requirements: | All pedestal diagnostics | ||
| Analysis Requirements: | Pedestal profile and stability analysis | ||
| Other Requirements: | -- | ||
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