DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 362: Comparison of Bootstrap Current in ELMing and non-ELMing H-Modes | ||
| Name: | Bejamin F Hudson ( |
Affiliation: | LLNL |
| Research Area: | Heating & Current Drive | Presentation time: | Not requested | Co-Author(s): | K. Burrell, C. Holcomb, C. Petty |
| Description: | Make a detailed comparision of bootstrap current profile and H-Mode pedistal gradients for ELMy and ELM-surpressed plasmas. | ||
| Experimental Approach/Plan: | We will combine MSE (Bz + Er) and CER (Er) to isolate Bz. Radial resolution will be increased by "Jogging" the plamsa position to scan pedestal region past the diagnostic field of views. To mitigate ELM activity we will use counter NBI to create a QH-mode plasma. Another method will be to use the I-coils to create a stochastic edge. With a profile of Bz, we will use equilibrium reconstruction or Ampere's law directly to determine the bootstrap current. | ||
| Background: | Boostrap current is an important component of edge stability models. One issue in model validation is the variation in bootstrap current in the presence of ELM's. | ||
| Resource Requirements: | Counter NBI, NBI for MSE views, I-Coils | ||
| Diagnostic Requirements: | TS, CER, MSE | ||
| Analysis Requirements: | EFIT | ||
| Other Requirements: | -- | ||
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