DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 360: Variation of Bootstrap Current with Collisionality in the H-Mode Pedistal | ||
| Name: | Bejamin F Hudson ( |
Affiliation: | LLNL |
| Research Area: | Heating & Current Drive | Presentation time: | Requested | Co-Author(s): | K. Burrell, C. Holcomb, C. Petty |
| Description: | Make detailed comparison of bootstrap current profile and H-Mode pedestal gradients under differing collisionality regimes. | ||
| Experimental Approach/Plan: | We will isolate Bz using MSE (Bz + Er) and measuring Er with CER. To increase radial resolution, we will "Jog" the plasma position to scan pedistal region past the diagnostic field of views. The collisionallity will be varied with other key dimensionless parameters held constant. With a profile of Bz, we will use equilibrium reconstruction or Ampere's law directly to determine the bootstrap current. | ||
| Background: | Collisionality in the edge plays an important role in the achievable parameters in many DIII-D discharges. By studying the behavior of the bootstrap current under different collisionalities, we will be able to better validiate stability models. | ||
| Resource Requirements: | -- | ||
| Diagnostic Requirements: | MSE, CER, TS | ||
| Analysis Requirements: | EFIT | ||
| Other Requirements: | -- | ||
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