DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 422: Monitoring dust levels following entry vent | ||
| Name: | Dmitry Rudakov ( |
Affiliation: | University of California, San Diego |
| Research Area: | Boundary | Presentation time: | Not requested | Co-Author(s): | P. West, C. Wong, J. Yu, M. Groth, B. Bray, N. Brooks, C. Lasnier, M. Fenstermacher, A. Pigarov, R. Smirnov, W. Solomon |
| Description: | Monitoring dust levels following entry vent to compare with those during normal operations. Determine dust cleanup rates. | ||
| Experimental Approach/Plan: | At the beginning of plasma startup following an entry vent, turn on all available cameras, Thomson scattering and spectroscopic diagnostics to monitor change of the dust and impurity levels. | ||
| Background: | At the beginning of the CY2007 experimental campaign cameras were used to monitor dust levels. In the first 2-3 plasma discharges after the vent dust levels were quite high with thousands of particles observed in each discharge. After about 15 discharges dust was virtually gone during the stationary portion of a discharge, and appeared at much reduced levels during the plasma initiation and termination phases. We would like to repeat these measurements to check reproducibility and get better statistics. Thomson scattering that was not available in 2007 is highly desirable to monitor submicron dust levels. | ||
| Resource Requirements: | None - piggyback activity. | ||
| Diagnostic Requirements: | Essential: UCSD fast camera, DiMES TV, lower divertor tangential TVs; highly desirable: Thomson (divertor and core), SPRED, filterscopes, MDS, upper divertor and mid-plane TVs | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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