DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
Login | Review | Submit | Logout | Help
Questions about this website? Contact Andrew LeBlanc Questions about ROF? Contact Chuck Greenfield
| Title | 276: Pedestal width in Hydrogen discharges | ||
| Name: | Phil Snyder ( |
Affiliation: | General Atomics |
| Research Area: | Hydrogen Discharges | Presentation time: | Not requested | Co-Author(s): | -- |
| Description: | A number of theoretical models of the pedestal width produce a width related to the ion gyroradius or poloidal gyroradius. Because of the tight coupling between pedestal width and height (pedestal height is expected to scale roughly as width^3/4 if the pedestal is peeling-ballooning stability constrained), and because of the difficulty of separating gyroradius dependence from beta or beta_p dependencies in deuterium plasmas, it is useful to look at the mass ratio dependence. | ||
| Experimental Approach/Plan: | Optimize plasma for pedestal diagnostics in a hydrogen plasma. Measure the pedestal width in several different regimes, reproducing a series of common discharge shapes. Focus on strongly shaped low density discharges where pedestal width is expected to be somewhat wider and more precisely measurable. | ||
| Background: | -- | ||
| Resource Requirements: | -- | ||
| Diagnostic Requirements: | -- | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
Print this page