DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 301: Does RMP ELM suppression have hysteresis? | ||
| Name: | Michael J. Schaffer ( |
Affiliation: | General Atomics |
| Research Area: | ELM Control & Pedestal Physics | Presentation time: | Not requested | Co-Author(s): | Evans, Fenstermacher, Moyer, Joseph expected |
| Description: | This experiment will investigate whether ELM suppression can be maintained after a steady state has been reached by a smaller RMP field than was required to initiate suppression (hysteresis). The presence of hysteresis might help identify those aspects of the pedestal profiles that are most important for suppression. | ||
| Experimental Approach/Plan: | In a conventional RMP ELM suppression experiment, slowly reduce the RMP amplitude after the pedestal and core profiles have attained steady state. | ||
| Background: | In most past experiments, the I-coil n=3 RMP field is applied to a strongly ELMing plasma and kept constant. However, it is observed that pedestal profiles are strongly modified by the RMP and the pedestal itself is narrowed. | ||
| Resource Requirements: | -- | ||
| Diagnostic Requirements: | -- | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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