DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 411: Poloidal Asymmetry of Separatrix heat flux in H-mode | ||
| Name: | Anthony W Leonard ( |
Affiliation: | General Atomics |
| Research Area: | Thermal Transport in the Plasma Boundary | Presentation time: | Not requested | Co-Author(s): | -- |
| Description: | Use a balanced double-null divertor to determine the in/out asymmetry of heat flux crossing the separatrix | ||
| Experimental Approach/Plan: | Create a balanced double-null configuration in L-mode and ELMing H-mode. Set up the H-mode to have regular well spaced ELMs. Measure the the heat flux to all 4 strike-points using IR cameras and four mounted probes. Compare the in/out asymmetry in L-mode to H-mode. For H-mode measure the heat flux between ELMs with the floor probes, and compare to the IR cameras. The particle flux will be more difficult to determine due to target plate recycling. | ||
| Background: | The in/out asymmetry of heat and particle flux across the last closed flux surface is well established in L-mode in a number of devices. The level of asymmetry in H-mode is less well characterized. This experiment would provide an estimate of this asymmetry in H-mode. It is likely the in/out heat flux can be estimated, but the particle flux will be more problematic. | ||
| Resource Requirements: | Double null configuration with 2-5 co-NBI sources | ||
| Diagnostic Requirements: | Pedestal and divertor diagnostics, particularly target plate probes and IR cameras. Fluctuation diagnostics would also be desirable. | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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