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Published bySilas McDowell Modified over 9 years ago
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Steady State Discharge Modeling for KSTAR C. Kessel Princeton Plasma Physics Laboratory US-Korea Workshop - KSTAR Collaborations, 5/19-20/2004
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Integrated Simulations Combined with Stand-alone Analysis for KSTAR Develop steady state advanced scenario simulations –Magnetics/position, shape, current reconstruction and control –Auxiliary heating/CD systems ---> models and control –MHD stability and control –Profile evolution ----> setup and control –Perturbations simulations to examine energy, particle, current transport responses and control –Utilize sophisticated physics models for benchmarks –Determine response to installed powers, and help plan upgrade sequences ??
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KSTAR Can Benefit From and Provide Feedback for Fusion Simulation Efforts Experiments (constraints on theory, and practical constraints on assumptions, B.C.s, includes expansion of interpretation tools) Sophisticated Physics Modeling (stand alone, physics topical specific, algorithms judged against versatility and comp. speed) Integrated Simulation (fast enough for parametrics) Standardized integrated modeling tool(s) for predictive and interpretive simulations
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Several Aspects to Integrated Simulations -- What is most critical for KSTAR? More physics models in the integrated simulations More sophisticated (more accurate/detailed) models in the integrated simulations More experimental benchmarks/verifications of individual physics models and integrated simulations which use those models More benchmarks between integrated simulations physics models and stand-alone sophisticated physics models Development of faster or more versatile physics models Improvement of integrated simulation core/interface/data tools Establish simultaneous Near term goals Mid term goals Long term goals
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KSTAR Has Unique Capabilities That Make for a Complex Research Plan 4 sources (NBI, LH, EC, ICRF) Strong shaping Long pulse Divertor/pumping Present-day diagnostics DIII-D like, C-Mod like, and ITER like AT-modes NTM & RWM onset and stabilization or avoidance Impurity control for power handling Non-solenoidal current rampup Global control strategies for shape, density, stored energy, current profile, transport, and disruption avoidance Impact of nonlinear n, T, and j transport profile responses
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Proposal Free-boundary integrated discharge simulations of KSTAR advanced tokamak operating scenarios 0D systems analysis to identify viable power-CD-stored energy solutions ---> including engineering constraints (power handling, etc.) Tokamak simulation code coupled with required modules Stand-alone analyses as required (more sophisticated physics models) Examine Phase I (20 s) operating space Examine Phase II (300 s) operating space ---> Identify CD limitations, auxiliary system power requirements and plasma operating parameters (n, Ip, B T, etc.) of self-consistent configurations ---> Examine controllability of current profile, plasma shape, and stored energy simultaneously ---> Identify best auxiliary system upgrade choices and impact of uncertainties on performance (transport, density control, etc.) Modest funding -----> analysis with existing computational tools Increased funding -----> more extensive integrated modeling tool development KSTAR’s near term operation can serve as guide and test bed for SciDAC and FSP efforts, as well as NSTX, DIII-D and C-Mod modeling
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Proposal 0407080910110605 20 s 1st plasma upgrade start initial operationbaseline operation Integrated modeling effort for 20 s baseline operation, with some modeling for 300 s Extensive interpretive modeling and predictive model (300s) development/correction from expts results high performance Long pulse, high f NI AT modes Advanced control What should we be doing now??
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