DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 488: Role of pedestal in beta scaling of confinement | ||
| Name: | Anthony W Leonard ( |
Affiliation: | General Atomics |
| Research Area: | Transport | Presentation time: | Not requested | Co-Author(s): | R. Groebner |
| Description: | Use two different configurations to carry out a dimensionless beta scan. In one configuration the pedestal height is sensitive to changes in beta and the other case the pedestal is not sensitive to global beta. Measure the confinement changes with global beta in each configuration. | ||
| Experimental Approach/Plan: | In the standard hybrid configuration create a two point dimensionless beta scan. Carry out this scan in LSN and then USN, i.e. change the grad B drift direction. | ||
| Background: | In the LSN, favorable GradB drift direction, the pedestal was found to not respond to changes in BetaN. Also a confinement degradation with B was measured. In USN, unfavorable GradB direction, but otherwise identical configuration, the pedestal responded signficantly with BetaN, essentially proportional to Beta. Examining both configuration would go a long ways towards determing what role the pedestal is playing for beta scaling of confinement. | ||
| Resource Requirements: | All co beams | ||
| Diagnostic Requirements: | all pedestal diagnostics | ||
| Analysis Requirements: | profile and stability analysis | ||
| Other Requirements: | -- | ||
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