Scrape-off layer plasma and neutral characteristics and their interactions with walls for FNSF
| Autor: | T.D. Rognlien, M.E. Rensink, D.P. Stotler |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Mechanical Engineering Divertor Flux chemistry.chemical_element Plasma Tungsten 01 natural sciences Magnetic flux 010305 fluids & plasmas Nuclear Energy and Engineering Heat flux chemistry Physics::Plasma Physics Sputtering 0103 physical sciences Nuclear fusion General Materials Science Atomic physics 010306 general physics Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. 135:380-393 |
| ISSN: | 0920-3796 |
| Popis: | Simulations of the heat flux on plasma facing components from exhausting core plasma are reported for two possible Fusion Nuclear Science Facility (FNSF) divertor configurations. One configuration utilizes divertor plates strongly inclined with respect to the poloidal magnetic flux surfaces like that planned for ITER and results in a partially detached divertor-plasma. The second configuration has divertor plates orthogonal to the flux surfaces, which leads to a fully detached divertor-plasma if the width of the divertor region is sufficient. Both configurations use scrape-off layer impurity seeding to yield an acceptable peak heat flux of ∼10 MW/m 2 or smaller on the divertor plates and chamber walls. The roles of recycled hydrogenic atoms and molecules are investigated and distribution of sputtering tungsten throughout the edge region modeled. The simulations are performed with the UEDGE 2D transport code to model both plasma and neutral components with supplementary neutral modeling performed with the DEGAS 2 Monte Carlo code. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect