Hα线型分析

ANALYSIS OF H α LINE SHAPE

利用高斯分布拟合ＨＴ６Ｍ托卡马克Ｈα线型，得出了由反射进入等离子体中的氢原子、氢分子离解后产生的氢原子，以及电荷交换产生的氢原子辐射Ｈα谱线的份额，由Ｄｏｐｐｌｅｒ频移和展宽分别得出它们的入射速度和离子温度．在简化模型下讨论了氢原子的输运行为，得出了氢原子的密度分布和体发射系数，以及入射速度大小对粒子约束时间的影响，并与实验数据进行比较．

Abstract The H α line shape has been fitted with Gaussian function. H α intensities emitted by the hydrogen atoms,which are reflected by the limiter,and produced from hydrogen molecular dissociation and charge exchange,were obtained. We have also obtained their incident velocity and ion temperature from Doppler broadening and Doppler shift. This paper discussed the hydrogen atom transport with a simplified model gave the profile of hydrogen atom density and emission coefficient,and analyzed the influence of incident velocity on particle confinement time. Hydrogen atom energy spectra have been also derived from the H α line shape,It shows that the main molecular processes at the edge of the plasma are hydrogen molecular dissociative excitation and ionic dissociation.