DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2013 EXPERIMENTAL CAMPAIGN
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| Title | 142: ELM heat transport in the snowflake divertor. | ||
| Name: | Vsevolod Soukhanovskii vlad@llnl.gov | Affiliation: | Lawrence Livermore National Laboratory |
| Research Area: | Divertor & SOL Physics | Presentation time: | Requested |
| Co-Author(s): | S. L. Allen, T.Petrie, D. D. Ryutov | ITPA Joint Experiment : | No |
| Description: | Working together with LLNL Theory group, we would like to make a quantitative assessment of the SF null-point heat convection theory on ELM heat transport. Fast IR thermography measurements of the inner and outer divertor strike points are needed for this assessment. Other fast diagnostics will be needed as well, e.g., DISRAD for rad. power measurements, fast filterscopes, Langmuir Probes. Upstream and downstream poloidal beta will be estimated from measurements. Relative timing of ELM conductive and convective pulses arrival to the inner and outer strike points will be measured in the standard and in the snowflake (-plus, -minus) divertor configurations. From these measurements, heat flux partition and relative loss could be assessed. |
ITER IO Urgent Research Task : | No |
| Experimental Approach/Plan: | -- | ||
| Background: | Initial snowflake-minus divertor studies in DIII-D indicated that ELM energy was universally reduced in the snowflake configuration, and ELM peak heat flux in the divertor outer strike point region was significantly reduced in the snowflake configuration with deuterium seeding.
Inner divertor measurements were not performed. | ||
| Resource Requirements: | -- | ||
| Diagnostic Requirements: | -- | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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