ASIPP ITER-like Tungsten Divertor Development and Experiments on EAST L. Wang, G. -N. Luo*, Q. Li, F. Ding, W. J. Wang, D. M. Yao, G. S. Xu, H. Y. Guo, Y. Liang, Y. W. Sun, X. Z. Gong, B. N. Wan, J. Li and X. D. Zhang 1 st IAEA TM on Divertor Concepts, Vienna, Sep 29 - Oct 2, 2015 *E-mail: [email protected]Institute of Plasma Physics, Chinese Academy of Sciences
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ITER-like Tungsten Divertor Development and Experiments on ... · tungsten interactions (PWI) have been carried out. W divertor for long-pulse high performance operation of EAST will
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ASIPP
ITER-like Tungsten Divertor Development and Experiments on EAST
L. Wang, G. -N. Luo*, Q. Li, F. Ding, W. J. Wang, D. M. Yao, G. S. Xu, H. Y. Guo, Y. Liang, Y. W. Sun, X. Z. Gong, B. N. Wan, J. Li and X. D. Zhang
1st IAEA TM on Divertor Concepts, Vienna, Sep 29 - Oct 2, 2015
In-out asymmetry of divertor particle fluxes during ELMs
LSN, C-divertor, Normal Bt
USN, W-divertor, Normal Bt ELM particle flux favors outboard divertor in USN, while favors inboard divertor in LSN. Provides reference for particle
exhaust during long-pulse H-mode operation. Consistent with PS flow, as
measured by LFS reciprocating Langmuir probes.
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ASIPP
Outline
1. Development of W/Cu Divertor on EAST – Engineering – Commissioning
2. Experiments of W divertor operation – Experimental results in 2014 – Preliminary results in 2015
3. Summary & Outlook
19 1st IAEA TM on Divertor Concepts, Sep 29 - Oct 2, Vienna, 2015
ASIPP
Summary & Outlook
EAST upgraded its upper divertor into full W/Cu-PFCs, employing HIP technology and e-beam welding in 2014.
Commissioning in 2014 found leak and damage in the EAST W divertor. Repairing & optimization exhibits technology success in the 2015 campaign.
Preliminary divertor experiments & study on plasma-tungsten interactions (PWI) have been carried out.
W divertor for long-pulse high performance operation of EAST will be attempted in the coming campaigns.
Series of experiments to study W-divertor capabilities, performance, Div-SOL physics and PWI are planned.
20 1st IAEA TM on Divertor Concepts, Sep 29 - Oct 2, Vienna, 2015
ASIPP
Thank you!
Welcome collaborations!
21 EAST – Test Bed for ITER & CFETR
ASIPP
B×▽B↓
Initial comparison of W/C divertor particle exhaust capability with Li coating
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dRsep (m)
Total puff (0-7s): USN=1.65E22 D, LSN=1.55E22 D; More input data are needed to draw an USN/LSN comparison conclusion, especially for long pulse operation.
ASIPP
Tungsten/Wall diagnostics
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ASIPP
Heat and particle flux diagnostics
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Parameters to be measured: nt, Tt, Vf, particle & heat fluxes toroidal asymmetry …