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CFETR 电流驱动的初步讨论

李国强 任启龙 刘素梅 宋云涛中科院等离子体物理研究所

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中性束切向注入

• 目前的窗口应该可以实现中性束切向注入

• ITER NBI aperture size (58cm,136cm)

• May vertically tilt to drive off-axis current

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The driven current of different injection angle

• 磁轴高度上水平入射• 1 MeV NNBI, 30MW• density profile is scaled

from DIII-D 136345.• ne=0.9e20/m^3• Density peaking=1.38• Calculated with ONETWO/

NUBEAM

切半径（ cm) 400 450 500 550 600 650 700

Drive current (MA) 0.44 0.56 0.70 0.82 1.01 1.15 0.71

Driven current of 30MW NBI

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ECCD for CFETR

• 140 GHz ECCD was selected, O1 mode• density profile is scaled from DIII-D 136345• Calculated with ONETWO/TORAY-GA

– For ITER, the CQL3D results are about 1.2 times of TORAY-GA

• 弱场侧斜上方入射，扫描入射角度• 需要更多的扫描计算

170G 共振面140G 共振面

入射极向角 100 110 120 130 140

驱动电流(MA)

0.60 0.72 0.75 0.69 0.09

30MW ECCD, 环向角 230度

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ECCD calculation on ITER

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LHCD• LHCD efficiency becomes lower with the density increase, but

still higher than NBCD and ECCD• But the driven current cannot access the core region

FDF, 30MW ITER, 30MW, ne=7.25e19/m^3

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Discussion

• Lower density is beneficial for CD• How to balance the density and fusion power?• The combination of Heating/CD ?

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谢谢