DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 168: ELM supression at high density | ||
| Name: | Larry R. Baylor ( |
Affiliation: | Oak Ridge National Laboratory |
| Research Area: | ITER Demonstration Discharges | Presentation time: | Requested | Co-Author(s): | M. Fenstermacher, T. Evans, R. Moyer, T. Jernigan |
| Description: | This experiment is to demonstrate the viability of ELM supression with external magnetic field ergodization with high density operation using pellet fueling. | ||
| Experimental Approach/Plan: | Select an optimized discharge for ELM supression in ITER like plasma shape and add the injection of 1.8mm fueling pellets at the highest frequency available (~15 Hz). Determine operational window with ELM supression. If ELMs occur, determine the ELM energy loss using fast EFIT and compare to natural ELMs without I-coil operation. | ||
| Background: | The ITER plasma facing components have a limit on the energy that can be expelled from an ELM of 1 MJ. Methods to limit the ELM energy and eliminate ELMs all together are needed. Supression of ELMs with ergodic fields has been demonstrated on DIII-D and may be attempted on ITER. IT will be necessary for ITER to operate at high density in order to maximise fusion power. The combination of high density and ELM supression are needed and this experiment will attempt to achieve this scenario and to show a credible operational option for ITER. | ||
| Resource Requirements: | I coil
Pellet Injector inner wall locations | ||
| Diagnostic Requirements: | Full complement of ELM and pellet diagnostics | ||
| Analysis Requirements: | --Fast EFIT for energy loss determination from ELMs (if they occur). | ||
| Other Requirements: | -- | ||
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