DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 191: Accessibility to AT regimes with ITER-scaled DIII-D shapes | ||
| Name: | Thomas A. Casper ( |
Affiliation: | Lawrence Livermore National Laboratory |
| Research Area: | ITER Startup, Shutdown, Vertical Stability | Presentation time: | Not requested | Co-Author(s): | T. Casper, T. Luce, G. Jackson |
| Description: | Reference scenarios for ITER startup exhibit a rapid drop in the qmin and early onset of sawteeth well before reaching current flattop. We will explore startup scenarios using different plasma shapes (e.g. large bore, perhaps found in other ITER-related experiments) in the early part of the current ramp to maintain elevated q profiles in the ITER-similar shapes. | ||
| Experimental Approach/Plan: | Use discharge shape variations to control parameters during startup and extend the time to sawtooth. Vary the time of X-point formation and explore its effect on q-profile evolution. Apply auxiliary heating to maintain the higher qmin using variations consistent with ITER-relevant capabilities. Use ECH and/or NBI to heat or drive current during the ramp to explore the possibility of high qmin in these ITER shaped discharges. | ||
| Background: | -- | ||
| Resource Requirements: | -- | ||
| Diagnostic Requirements: | -- | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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