DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 309: Simple as possible fast-ion transport by TAEs | ||
| Name: | William W. Heidbrink ( |
Affiliation: | University of California, Irvine |
| Research Area: | Energetic Particles | Presentation time: | Requested | Co-Author(s): | Van Zeeland, Nazikian, Gorelenkov |
| Description: | Operate with super-Alfvenic beam ions in a regime with only a few TAEs and limited low-frequency MHD. Acquire FIDA and BES data in order to measure the TAE eigenfunction and its effect on the fast-ion profile. | ||
| Experimental Approach/Plan: | Use co-going Left beams. Operate at low field--probably 1.0 or 1.2 T--so the circulating beam ions satisfy the fundamental TAE resonance condition. Try to keep q95 relatively high to avoid large sawteeth or fishbones. Switch 330LT and 150LT beams to get both FIDA and BES data. | ||
| Background: | Attempts to explain our accurate measurements of fast-ion transport in reversed-shear plasmas have failed despite excellent measurements of the mode structure. The goal is to obtain data of comparable quality that should be easier to model theoretically as a first step to resolving this perplexing & important discrepThe expanded BES array permits the possibility of excellent eigenfunction measurements at lower fields (where ECE is unavailable). This is an ITPA experiment, MDC-11. | ||
| Resource Requirements: | Three co Left beams required; some other sources desirable. | ||
| Diagnostic Requirements: | FIDA, BES (new radial array) essential. | ||
| Analysis Requirements: | Match eigenfunctions with NOVA. Input modes into ORBIT. TRANSP and FIDA analysis. | ||
| Other Requirements: | -- | ||
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