DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 250: H-mode transition assisted by edge ECH | ||
| Name: | Ron Prater ( |
Affiliation: | General Atomics |
| Research Area: | Transport | Presentation time: | Not requested | Co-Author(s): | -- |
| Description: | Apply ECH near but inside the edge of an L-mode plasma to see if that can reduce the total heating power needed to achieve the H-mode transition. | ||
| Experimental Approach/Plan: | Apply ECH to the edge of an L-mode plasma while ramping up the NBI power from zero to above the H-mode transition. Repeat with the ECH central instead, and find whether the power needed to effect the transition is different. | ||
| Background: | Methods to reduce the power needed to achieve H-mode are needed for ITER, especially during the hydrogen campaign. In the 1990's it was found in some tokamaks that edge ECH was effective in making the H-mode more accessible, but this was not followed up. | ||
| Resource Requirements: | 2.5 MW ECH, 10 MW NBI. | ||
| Diagnostic Requirements: | -- | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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