DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 478: W Rod Armor Plasma Exposure | ||
| Name: | Clement Wong ( |
Affiliation: | General Atomics |
| Research Area: | Boundary | Presentation time: | Not requested | Co-Author(s): | D. Youchison, S. Allen, P. West, D. Rudakov |
| Description: | To study the thermal and mechanical response of the W rod armor at the divertor location of DIII-D. The study will also include erosion response, material redeposition in the rod gaps, IR emissivity calibration and thermal couple data acquisition on DiMES. | ||
| Experimental Approach/Plan: | We propose to use the DiMES mechanism to insert the W-rod sample into the lower divertor of DIII-D, and to expose the sample to different plasma discharges, while collecting IR camera and thermal couples data. The sample can be exposed to different plasma and transient events including ELMs and disruption exposures. Subsequent examination of the sample can provide information on carbon and hydrogen deposition in rod gaps, surface coating impact to emissivity, and displacement or melting of the W-rod surface. | ||
| Background: | W surface is proposed in a portion of the ITER divertor. W rod armor is also proposed for CTF/FDF and DEMO designs. It is important to gather integrated experimental data on the behavior of W rod armor in a takamak divertor. | ||
| Resource Requirements: | DiMES system. | ||
| Diagnostic Requirements: | All the lower divertor diagnostics. | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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