M.Yokoyama (National Institute for Fusion Science)

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Presentation transcript:

Development and application of integrated transport code 　　　　　　　　　　to LHD plasmas M.Yokoyama (National Institute for Fusion Science) for TASK3D collaborators

TASK3D Objectives Extension of integrated code (TASK) applicability to general toroidal plasmas (stellarator-heliotron plasmas) S-H specific physics 3D feature Module extension/modification based on TASK LHD experiment : integrated analysis prediction, operation scenario validation

Module Extension/modification Stellarator-Heliotron specific physics 　　 Neoclassical (NC) diffusion (3D configuration, Er) 　　 Er determined by NC ambipolar condition NBI deposition including re-entering effects Impact of pressure driven MHD instability on pressure profile 3D feature 3D equilibrium Evolution of rotational transform instead of the current evolution (easier to include 3D effects) Heating modules incorporating 3D equilibrium DGN/LHD ER MORH MSSH VMEC HINT2 NEWBOZ EI FIT3D WM LHDGauss

TASKTASK3D: module extension/modification EQ TR TX FP WR WM DP Fixed-boundary equilibrium Diffusive transport Dynamic transport Kinetic transport Ray and beam tracing Full wave analysis (ICH) Wave dispersion NBI analysis (Guiding Center) TASK FIT3D Heating in LHD EI ER DGN/LHD VMEC current (iota) evolution radial electric field Neoclassical diffusion coefficient DB 3D equilibrium (nested surface) HINT2 3D equilibrium (w/o nested surface assumption) MSSH MHD instability’s impact on pressure profile MORH NBI analysis (Re-entering) LHDGauss Ray tracing (ECH) BOOZER 3D equilibrium in Boozer coordinates TASK3D 3D Physics 3D Equilibrium

Predictive simulation by a part of TASK3D ~ Temperature profile variation for NBI heated plasmas ~ VMEC 3D equilibrium Boozer FIT3D NBI deposition TR 1D diffusion transport equation Gyro-Bohm DGN/LHD NC diffusion coeff. DB ER radial electric field

Predictive simulation by a part of TASK3D Rax=3.60m , B=-2.75T: equilibrium fixed 5 beam lines applied Density profile : fixed n0=2e19 n0=4e19 n0=6e19 Dedicated experiment was conducted in Sep. 2011. Anomalous transport modelling, track of configuration change, etc.. towards increased predictability: validation study -> Operation scenario for high-performance steady-state LHD plasmas

Coordinated Working Group Meeting (CWGM) Helical Plasmas：Diversity  Systemization Joint experiment/database/analysis/papers The gateway to “3D” issues