LHD偏滤器中$\mathrm{H}_2$的等离子体参数对滚振温度的影响
Plasma-Parameter Dependence of Ro-Vibrational Temperatures for $\mathrm{H}_2$ in LHD Divertor
摘要：
我们分析了在大螺旋装置中测量的一千个偏滤器等离子体的Fulcher- $α$带可见光谱。利用日冕模型和贝叶斯推论，计算了氢分子电子基态的布居分布。非热布居分布恢复与双温度模型，它有两套转动和振动温度，以及它们的混合系数。较低的旋转温度显着变化，根据等离子体参数。发现它与电子密度近似线性相关，这与以前的工作是一致的。较低的振动温度也显示出一个小的密度依赖性，由以前的工作报告。另一方面，较高的旋转和振动温度以及混合系数在等离子体参数的宽范围内仅显示出轻微的变化。这些人口参数显示出显着的相关性，与较高的电子密度，所有的温度和较高温度的组件的分数同时增加。这表明电子碰撞对粒子数分布起着重要的决定作用。
英文摘要：
We analyzed a thousand visible spectra of Fulcher-$α$ band measured for divertor plasmas in Large Helical Device. With a coronal model and Baysian inference, the population distribution of hydrogen molecule in the electronical ground state were estimated. The non-thermal population distribution was recovered with a two-temperature model, which has two sets of rotational and vibrational temperatures, as well as their mixture coefficient. The lower rotational temperature significantly changes according to the plasma parameters. Its nearly linear dependence on the electron density was found, which is consistent with previous works. The lower vibrational temperature also shows a small density dependence, as reported by a previous work. On the other hand, the higher rotational and vibrational temperatures as well as the mixture coefficient only show slight changes over the broad range of plasma parameters. These population parameters show a significant correlation; with higher electron density, all the temperatures and the fraction of the higher-temperature component increase simultaneously. This suggests that the electron-impact plays an important role to determine the population distribution.
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