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首页> 外文期刊>Plasma physics and controlled fusion >Simulated correction to poloidal charge-exchange recombination spectroscopy measurement in a tokamak
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Simulated correction to poloidal charge-exchange recombination spectroscopy measurement in a tokamak

机译：托卡马克中的倍体电荷交换复合光谱测量的模拟校正

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摘要

Taking into account the effects of atomic processes and the observation angle, a simple code modelling the correction to the poloidal charge-exchange recombination spectroscopy (CXRS) measurement in a tokamak is developed, which is an effective tool to correct the deviation in CXRS measurements. The simulated results show that the measured poloidal velocity shift is overestimated in the ion diamagnetic drift direction and the apparent ion temperature is underestimated because of the effects of the energy-dependent emission rate, finite lifetime of excited ions and the observation direction. This deviation will be more obvious with an increase in temperature, magnetic field, or observation angle. In the core region, the pseudo-shift coming from the observation angle effect is much more significant than that from others. The contributions from gradients of density and temperature are negligible compared to that from emission rate, lifetime and observation angle effects. Using the corrected velocity, a radial electric field (E-r) well is formed near the internal transport barrier (ITB) location for a typical plasma on the Japan Atomic Energy Research Institute Tokamak-60 Upgrade (JT-60U). It seems that the poloidal rotation enhances E, shear, which is speculated to be related to the ITB formation.
机译：考虑到原子过程和观察角的影响，开发了一个简单的代码来建模托卡马克中的多态电荷交换复合光谱法（CXRS）测量的校正，这是校正CXRS测量中偏差的有效工具。仿真结果表明，由于能量依赖的发射速率，受激离子的有限寿命和观察方向的影响，在离子反磁性漂移方向上高估了所测得的速度速度位移，而低估了表观离子温度。随着温度，磁场或观察角的增加，这种偏差将更加明显。在核心区域，来自观察角效应的伪位移比来自其他角度的伪位移要重要得多。与发射速率，寿命和观察角效应相比，密度和温度梯度的贡献可忽略不计。使用校正后的速度，将在日本原子能研究院Tokamak-60升级版（JT-60U）上的典型等离子体的内部传输屏障（ITB）位置附近形成一个径向电场（E-r）井。似乎极向旋转增强了剪切力E，这被认为与ITB的形成有关。

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