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ASIPP

EAST 托卡马克模拟 （ modelling ）现状

朱思铮 中科院等离子体物理研究所

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ASIPP

Current status of EAST

Formation of non-circular tokamak plasmas with divertor in a fully superconducting magnet system using an advanced PCS (RTEFIT/isoflux) from DIII-D

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ASIPP

Current status of EAST

• LHCD sustained non-inductive diverted plasmas for 60 seconds

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ASIPP

Current status of EAST

• Application of LH during the startup phase relieves the constraints on the superconducting coil system:

- Lowering substantially the loop voltage at plasma breakdown with LH waves- Volt second savings during LHCD assisted plasma current ramp-up- Reduction of AC losses in the superconducting PF coils (LH)

EAST has moved from a construction phase to a research phase

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ASIPP

Modelling support of EAST

• ASIPP has continued an extensive effort in building up a suite of essential modeling codes through international collaborations with U.S. and EU fusion laboratories.- Plan EAST facility improvements- Support EAST research

• GA-ASIPP joint integrated modeling development project- Develop new Integrated Modeling and Fitting Tool IMFIT to support DIII-D, EAST, ITER

• Modelling support strategy- In step with EAST program goals- In complement with EAST diagnostic development program- High priority for possible EAST contributions to ITER

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ASIPP

Modelling of EAST discharge using TSC (PPPL)

(a) plasma current (b) major radius (c) loop voltage and (d) electron temperature for EAST shot # 2422

PF currents for EAST shot #2422

for a pure ohmic EAST dischargeexperimental(grey) and simulated(black)

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ASIPP

Integrated modeling needsfor EAST plasma start-up

- Integrate external environment with more complete transport module

- Integrate LH in ramp-up scenarios

- …

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ASIPP

Predictions of NBI in EASTusing ONETWO + NUBEAM (IMFIT)

AT equilibrium of EAST constructed by TOQ with EAST shape and DIII-D AT profiles

Total current density

Beam-driven current density

Current profiles. Co-beam, 5MW. Total beam-driven current is 200kA.

Ti

Te

Temperature profiles. Co-beam and courter-beam, 10MW.

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ASIPP

Predictions of LHCD in EASTusing ONETWO(GA) + LSC(PPPL)

LSC is integrated into ONETWO to model EAST discharges with LHCD (3MW) and NBI (3MW).

The non-inductive current, including LHCD + NBI + bootstrap current, accounts for almost 80% of the total current

Time evolution of electron and ion temperature profiles

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ASIPP

Modeling of ICRF in EASTusing TORIC (IPP-Garching, MIT)

Investigate a variety of ICRF heating schemes (30~110MHz, B0=3.2T ) - fundamental minority heating in D(H) and D(3He)- Mode conversion in D(3He) and D(H)- D harmonic heating

2 4 6 8 10 12 14 16 18 20 220

20

40

60

80

100

pow

er (%

)

concentration of H (%)

to D to H to electron (total) to electron (by IBW)

D(H) (45MHz x=13.519 cm LFS) D(3He) (32MHz x=-0.720 cm on-axis)electron heating by IBW 15% 3He

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ASIPP

Integrated modeling needsfor EAST heating and current drive systems

- Integrate ICRF antenna module with full-wave solver

- Integrate RF and NB systems with FP for ions and electrons self-consistently

- Integrate RF with edge plasmas

- …

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ASIPP

Modeling of EAST SOL/divertor plasmasusing SOLPS (IPP-Garching)

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ASIPP

Modeling of EAST divertorusing SOLPS (IPP-Garching)

0

0

0

1

40outer

2

3

2

1

80

120

T e(e

V)

n e(1

020 m

-3)

q tot

(MW

m-2

)

-0.5 0 0.5 1.0

Sep

arat

rix

1.5

Distance from separatrix (cm)

2.0

hg20

05.a

sipp

.9a

inner

midplane

ns = 1.51019 m-3

Ne

investigate target power loadinglocalized Ne puffing is modeled

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ASIPP

Integrated modeling needsfor EAST SOL/divertor plasmas

- Integrate SOL/divertor module with wall and PSI processes

- Integrate SOL/divertor module with edge/core

- …

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ASIPP

EASTViewer

Viewing EAST data & discharge parameters

Features: Python & Java in open source; across OS; easy extensible

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ASIPP

GA-ASIPP joint integrated modeling development project - IMFIT

• Development of new Integrated Modeling and Fitting Tool IMFIT

• Near-term IMFIT goal is to support DIII-D and EAST- Equilibrium reconstruction, transport, heating and current drive, and stability analyses- Theory-experiment comparison- Operation scenario development

• Comprehensive features- Easy interactions among modules- Convenient theory-experiment comparison and visualization to support model validations- New physics modules can be conveniently added

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ASIPP

GA-ASIPP joint integrated modeling development project - IMFIT

L.L. Lao1st IMEG Annual MeetingITER HeadquartersJune 23-26, 2009

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ASIPP

Summary

• EAST has moved from a construction phase to a research phase.

• ASIPP has continued an extensive effort in building up a suite of essential modeling codes.

• An Integrated Modeling and Fitting tool IMFIT (GA-ASIPP) is being developed to support DIII-D and EAST research.