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Code Integration for Efficient Divertor Design

Code Integration for Efficient Divertor Design. H. McGuinness D. Steiner. Nuclear Engineering Rensselaer Polytechnic Institute. ARIES project meeting UCSD, Nov 4-5 2004. Input. GOURDON. GRID. Coil Currents. Field lines. Vac. Field. Input. DESCUR. Mass Profile. Fouri. app. LCMS.

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Code Integration for Efficient Divertor Design

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  1. Code Integration for Efficient Divertor Design H. McGuinness D. Steiner Nuclear Engineering Rensselaer Polytechnic Institute ARIES project meeting UCSD, Nov 4-5 2004

  2. Input GOURDON GRID Coil Currents Field lines Vac. Field Input DESCUR Mass Profile Fouri. app. LCMS GOURDON GOURDON VMEC VMEC Field lines Field lines GEOM GEOM Plasma Equil. Plasma Equil. GOURDON MFBE MFBE Geometry Geometry Field lines Mag. Field Mag. Field Input Orbit3D GOURDON Particle dist. Alpha loss. Guid. Centers In/out LCMS ? Orbit3D Alpha loss. Data Data Footprints / Heat Loads Footprints / Heat Loads? Code System

  3. GOURDON GEOM ORBIT3D Future Capabilities • Parallized version  Many more lines • Capable of tracing guiding centers  ?? • Utilize GEOM  Faster run times, simple intersection data • T3E version  X1 at ORNL, Convert? • Inclusion of gyro radius  more accurate description of α loss • Utilize GEOM also? • Input PFC, FW, LCMS geometry  Tagged map of geometry

  4. The GEOM Code • GEOM = GEOmetric Mapping • Like MFBE, divides ROI into grid (NФ, NR, NZ) • Each “area” has unique numerical tag Areas = divertor region, between LCMS and FW, surfaces • Each cell recieves numerical tage via process of complex integration on point (like MFBE) Parallelized in the Toroidal direction Compute IM of contour around surfaces IN OUT “Tagged” 3D array of geometry Geometry of PFCs, FW, LCMS

  5. GEOM Conintued

  6. GEOM/GOURDON Interface • GOURDON reads in GEOM tagged mapping • Every integration step, it queries the tag cell If appropriate tag, GOURDON does expensive location calculation GEOM introduces no error • Saves time, easy to track intersection with PFC/FW (even LCMS) • Can be used to find intersection data for arbitrarily shaped surface.

  7. • Current GOURDON traces fieldlines • Use Lc to find approx. for heat flux GOURDON Output • Heat Loads, Peaking factors, etc

  8. • Trace guiding centers instead… Directly find energy deposited by particles Long Lc? Guiding centers… • What if Lc is too long for analytic model?

  9. Conclusion • New codes will be introduced to help in divertor design GEOM: Simple geometry input, speeds up GOURDON GOURDON: Parallelized, guiding centers ORBIT3D: gyro-radius, GEOM? • Need more advanced codes for final design?

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