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1/7M.Yokoyama, ITPA-IOS Kyoto Oct. 2011
Development and application of integrated transport code
to LHD plasmas
M.Yokoyama (National Institute for Fusion Science)
for TASK3D collaborators
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2/7M.Yokoyama, ITPA-IOS Kyoto Oct. 2011
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
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3/7M.Yokoyama, ITPA-IOS Kyoto Oct. 2011
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
Module Extension/modification
DGN/LHD
ER
MORH
VMEC
NEWBOZ
HINT2
EI
MSSH
WMLHDGaussFIT3D
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4/7M.Yokoyama, ITPA-IOS Kyoto Oct. 2011
TA
SK
3D
EQ
TRTX
FP
WR
WMDP
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
TASKTASK3D: module extension/modification
Heating in LHD
3D Physics
3D Equilibrium
EIER
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
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5/7M.Yokoyama, ITPA-IOS Kyoto Oct. 2011
Predictive simulation by a part of TASK3D
TR1D diffusion transport equation
~ Temperature profile variation for NBI heated plasmas ~
VMEC3D equilibrium
FIT3DNBI deposition
ERradial electric field
DGN/LHDNC diffusion coeff. DB
Gyro-Bohm
Boozer
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6/7M.Yokoyama, ITPA-IOS Kyoto Oct. 2011
Predictive simulation by a part of TASK3D
Rax=3.60m , B=-2.75T: equilibrium fixed5 beam lines appliedDensity profile : fixed
n0=2e19
n0=4e19
n0=6e19
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
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7/7M.Yokoyama, ITPA-IOS Kyoto Oct. 2011
Joint experiment/database/analysis/papers
Coordinated Working Group Meeting
(CWGM)
The gateway to “3D” issues
Helical Plasmas : Diversity Systemization