DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2013 EXPERIMENTAL CAMPAIGN
Review | Direct submission with log-in | Request submission without log-in
For website assistance, please contact the WebmasterQuestions about ROF? Contact Max Fenstermacher
| Title | 203: Dynamic plasma-wall equilibrium in ELMy H-mode | ||
| Name: | Alexander Pigarov apigarov@gmail.com | Affiliation: | CompX |
| Research Area: | Divertor & SOL Physics | Presentation time: | Requested |
| Co-Author(s): | -- | ITPA Joint Experiment : | No |
| Description: | -- | ITER IO Urgent Research Task : | No |
| Experimental Approach/Plan: | 2-3 dedicated ELMy H-mode shots similar to 144977 and one high-density L-mode shot. Modulated gas puff when discharge reaches an equilibrium. | ||
| Background: | ELMy H-mode discharges with minimal NBI, short outer leg, no gas puff and weak pumping on DIII-D showed ~25% particle losses from pedestal during ELMs and an unsaturated recovery (almost linear)of discharge density up to 200ms. Preliminary modeling of ELM cycle based on new macroblob approach in UEGDE shows that without "wall" pumping of >50% of ELM particle losses, the pedestal density is recovered at very short time scale, 1-10ms.
Hypothesis is that (i)the "wall" is the main source of particles between ELMs, (ii) the ELMy dischage is in a dynamic plasma-wall equilibrium, and (iii) divertor is relatively transparent to neutrals. | ||
| Resource Requirements: | -- | ||
| Diagnostic Requirements: | temporal evolution of plasma pedestal and divertors+gas balance analysis during and between the shots | ||
| Analysis Requirements: | 1)time-dependent UEDGE-MB
2)TGLF analysis for fluxes and if any inward pinch is involved. | ||
| Other Requirements: | -- | ||
Print this page