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Power Loads and Divertor Design

Power Loads and Divertor Design. Hayden McGuinness Don Steiner Rensselaer Polytechnic Institute In collaboration with T.K. Mau and A. Grossman. Overview. Objective: Feasible Divertor Design considering heat loads, temperature distribution and physical extent. Tools: GOURDON/GEOM codes

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Power Loads and Divertor Design

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  1. Power Loads and Divertor Design Hayden McGuinness Don Steiner Rensselaer Polytechnic Institute In collaboration with T.K. Mau and A. Grossman

  2. Overview • Objective: Feasible Divertor Design considering heat loads, temperature distribution and physical extent. • Tools: GOURDON/GEOM codes • Time Table: Now!

  3. Methodology • Particles from plasma Following Field lines • Assume Power leaves LCMS uniformly • Field lines started with in 1cm of LCMS • Angle of Incidence, Line length, Densities

  4. Case1:Wall conformal to LCMS

  5. Case1 Continued…

  6. Case 2: Truly Conformal • Need to specify real space coordinates • Pros: Accurate, Real Space, “Platelets” • Cons: What size area to use?

  7. Case 2…

  8. Case 3: Flowing with Lines • Need other Indicators • Radial Field Line Density • Follow the Helical Edge • Set Wall Back

  9. Case 3…

  10. Case 3 Advantages • Initial problems with Baffles • Angle plate in Poloidal/Toroidal direction • ½ intercepted but ¼ hit sides • Tilt with Field lines • Large Improvement. 2/3 Hit, few on sides • How close can we get to LCMS?

  11. Case 3 stats • Maxium Platelet Heatload = 5% of Power • Ave Plate Length = 424 m • Ave Wall Length = 30 m

  12. Summary and OutLook • Ergodic design robust • Details important in close quarters • Plate not necessarily conformal • Poloidal versus Toroidal Strike Strips • Tilting with the Field Line is Beneficial • High Line interception achievable

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