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 | 485: Sheath Factor measurement in unbalanced Double Null | ||
| Name: | Jonathan G. Watkins ( |
Affiliation: | Sandia National Laboratories |
| Research Area: | Boundary | Presentation time: | Not requested | Co-Author(s): | lasnier, Stangeby |
| Description: | Test the sheath power transmission theory using a double null plasma. Vary the magnetic balance slightly around the balance point to shift the fast electron heat flux at the strike point from the lower divertor to the upper divertor while measuring the heat and particle flux to the strike point. | ||
| Experimental Approach/Plan: | Control fast electron content of lower divertor plasma with DN balance. Control collisionality with density. Measure heat flux with IR camera. Measure particle flux with Langmuir probes near strike point. Measure Te with Langmuir probes and Divertor Thomson near strike point. Plot heat vs particle flux*Te for different drsep and density values. | ||
| Background: | The heat flux balance varies very strongly with drsep near the balance point of a DN plasma. The particle flux does not vary as quickly. This difference in drsep dependence allows us to study the two quantities independently. | ||
| Resource Requirements: | cryo pumps | ||
| Diagnostic Requirements: | IRTV
Floor probes midplane probe xpt probe | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
Print this page