DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
Login | Review | Submit | Logout | Help
Questions about this website? Contact Andrew LeBlanc Questions about ROF? Contact Chuck Greenfield
| Title | 357: Test the feasibility of operating ITER steady-state scenario demonstration discharges in DIII-D | ||
| Name: | John Ferron ( |
Affiliation: | General Atomics |
| Research Area: | ITER Demonstration Discharges | Presentation time: | Not requested | Co-Author(s): | -- |
| Description: | Make an initial attempt at producing a 100% noninductively driven discharge with the parameters envisioned for ITER. Assess any issues that arise having to do with the change in discharge shape and accessibility of values of q_min above 2. | ||
| Experimental Approach/Plan: | Produce a steady-state scenario discharge similar to what has been operated previously in DIII-D, except with the ITER shape. This would mean focusing on discharges with q_min between 1.5 and 2. Assess any observed changes in the ability to obtain a high noninductive current fraction. Then, attempt to raise the value of q_min closer to what has been envisioned for ITER (about 2.2 in scenario 4). Assess the noninductive current fraction and bootstrap current fraction as a function of beta and compare with the anticipated ITER scenario. | ||
| Background: | The focus of steady-state scenario research in DIII-D has been discharges with shape that is double null divertor (plus or minus a small, nonzero dRsep). These discharges depend on operation with beta well above the no-wall stability limit in order to produce sufficient bootstrap current. Because ITER will be operated with a single null divertor shape, the beta limits and the resulting achievable bootstrap fraction could be significantly different from what is normally achieved with the double null discharge shapes. The effect of the change in discharge shape would be the first issue to address. | ||
| Resource Requirements: | -- | ||
| Diagnostic Requirements: | -- | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
Print this page