Divertor heat flux mitigation using Supersonic Molecular Beam Injection in type-III ELMy H mode plasmas of HL-2A tokamak

Divertor heat flux mitigation using Supersonic Molecular Beam Injection in type-III ELMy H mode plasmas of HL-2A tokamak
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在 HL-2A 托卡马克的 III 型 ELMy H 模式等离子体中使用超音速分子束注入减轻偏滤器热通量

DOI:
10.1016/j.jnucmat.2013.01.265
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发表时间:
2013-07
影响因子:
3.1
通讯作者:
Duan X.R.
Duan X.R.
中科院分区:
工程技术2区
文献类型:
--
作者:
Cheng J.;Yan L.W.;Dong J.Q.;Hong W.Y.;Yao L.H.;Huang Z.H.;Zhao K.J.;Gao J.M.;Chen C.Y.;Feng B.B.;Nie L.;Xiao W.W.;Yang Q.W.;Ding X.T.;Duan X.R.

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在HL-2A装置上,利用超音速分子束注入(SMBI)在III型Elmy H模等离子体中实现了偏滤器热流密度的降低。在SMBI后,ELM发生缓解,其特征是ELM频率增加2-3倍,幅度降低30-40%。相应的约束有轻微的退化(储能降小于7%)。小尺度灯丝(密度幅值和lt;2.8σ)的爆破率增加20-30%,偏滤器热流降低40-50%,这与辐射功率损失的增加是一致的。这一观察表明,SMBI应该是缓解ELM的一个很好的候选者。
Divertor heat flux mitigation has been achieved using the Supersonic Molecular Beam Injection (SMBI) in type-III ELMy H-mode plasmas on the HL-2A tokamak. After an SMBI, ELM mitigation occurs and is characterized by an ELM frequency increase by a factor of 2–3 and an amplitude decrease by 30–40%. The corresponding confinement has a little degradation (stored energy drops is smaller than 7%). The burst rate of smaller-scale filament (density amplitude <2.8σ) increases by 20–30%, and the divertor heat flux decreases by 40–50%, which is consistent with an increase in radiation power loss. This observation indicates that SMBI should be a good candidate for ELM mitigation.
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