Modification of neutron emission spectrum by Alfven eigenmodes in a deuterium-tritium plasma
Modification of neutron emission spectrum by Alfven eigenmodes in a deuterium-tritium plasma
复制标题
氘-氚等离子体中阿尔文本征模对中子发射光谱的修改
DOI：
10.1016/j.fusengdes.2018.12.055
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发表时间：
2018
影响因子：
1.7
通讯作者：
Hideaki Matsuura
中科院分区：
文献类型：
--
作者：
Shota Sugiyama;Hideaki Matsuura
由于激发阿尔文本征模（AE），中子发射谱可以从高斯修正。我们评估的中子发射谱时，燃料离子的速度分布函数被扭曲的AE，假设一个ITER类氘氚托卡马克等离子体。当剪切AE被激发的高能粒子在等离子体中，非麦克斯韦尾巴创建的燃料离子分布函数的方向是平行和反平行的磁场线。由于这些尾部的形成，在环轴的相同和相反方向上的中子发射谱中形成非高斯分量。各向异性、非高斯中子发射谱可用于实验验证和诊断由AE形成的燃料离子速度分布函数中的非麦克斯韦尾。
The neutron emission spectrum can be modified from Gaussian due to excited Alfvén eigenmodes (AEs). We evaluate the neutron emission spectrum when the fuel-ion velocity distribution functions are distorted by AEs, assuming an ITER-like deuterium–tritium tokamak plasma. When shear AEs are excited by energetic particles in a plasma, the non-Maxwellian tails are created in the fuel-ion distribution functions in directions that are parallel and antiparallel to the magnetic field lines. Due to formation of these tails, the non-Gaussian components are formed in the neutron emission spectrum in the same and opposite directions of the toroidal axis. The anisotropic, non-Gaussian neutron emission spectrum can be used for experimental verification and diagnostics of the non-Maxwellian tails in the fuel-ion velocity distribution functions formed by AEs.