DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2013 EXPERIMENTAL CAMPAIGN
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| Title | 218: Controlled Snowflake Divertor Study | ||
| Name: | Egemen Kolemen ekolemen@pppl.gov | Affiliation: | Princeton Plasma Physics Laboratory |
| Research Area: | Divertor & SOL Physics | Presentation time: | Requested |
| Co-Author(s): | V. Soukhanovskii, B. Duval, T. Petrie, S. Allen, SOL/Boundary Group. | ITPA Joint Experiment : | No |
| Description: | The snowflake configuration was studied with minimal control last year. Many of the parameter scans were not stable, snowflake + was not achievable with reliability, distance between the x-points was not an parameter we could adjust.
We proposed to study controlled divertor snowflake this year. |
ITER IO Urgent Research Task : | No |
| Experimental Approach/Plan: | 1. Develop and test Snowflake control for lower and upper divertor.
2. After snowflake divertor configuration control is developed, perform pedestal and divertor measurements in two configurations: snowflake-plus and snowflake-minus. 3. Scan the distance between the x-points with the control. Note the plasma behavior. 4. Perform parameter scans, for input power, SOL/divertor collisionality with deuterium puffing). 5.Impurity injection (e.g. argon) scan. 6. Study effect use cryopumping being on and off. 7. Gas injection based on radiation feedback to keep detachment. | ||
| Background: | -- | ||
| Resource Requirements: | -- | ||
| Diagnostic Requirements: | -- | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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