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Title 348: Testing of VPS-W coating on Cu heat sink from ASIPP
Name:Clement Wong () Affiliation:General Atomics
Research Area:Boundary Presentation time: Not requested
Co-Author(s): Guang-Nan Luo, Dmitry Rudakov, Phil West, Matt Baldwin, Russ Doerner
Description: W surface material is projected to be utilized for ITER, advanced tokamaks and DEMO. We would like to make use of the DiMES and MiMES system to test different thick W coatings on Cu heat sinks in DIII-D. Different W-coatings deposited by vacuum plasma spray (VPS) on Cu buttons will be exposed in helium plasma discharges.
Experimental Approach/Plan: Different W coated Cu heat sink button samples, with different W coating thicknesses, will be loaded onto DiMES and MiMES samples. The samples will be exposed to as many detached He or D2/He plasma discharges as possible, and at different surface temperature provided by resistive heating or by plasma contact.
Background: VPS-W/Cu heat sink design is proposed for the plasma facing components for EAST. But there is uncertainties on surface erosion, disruption tolerance and helium ion damage on W-surface materials at different surface temperatures. It is important to acquire integrated and controlled experimental data in an operation tokamak like DIII-D to study the effects for the design and fabrication of advanced limiter and divertor in EAST, ITER and future steady state operation tokamaks.
Resource Requirements: DIII-D operation and DiMES and MiMES system with material button samples.
Diagnostic Requirements: All the outboard chamber and lower divertor diagnostics and the core performance diagnostics.
Analysis Requirements: Surface analysis from EAST and US laboratories like PISCES and SNL. (M. Bladwin, R. Doerner, W, Wampler)
Other Requirements: --