Dancheva Y, Biancalana V, Pagano D, Scortecci F
CNISM, University of Siena, CSC and DSFTA, via Roma 56, 53100 Siena, Italy.
Rev Sci Instrum. 2013 Jun;84(6):065113. doi: 10.1063/1.4811664.
Near exit plane non-resonant light induced fluorescence spectroscopy is performed in a Hall effect low-power Xenon thruster at discharge voltage of 250 V and anode flow rate of 0.7 mg/s. Measurements of the axial and radial velocity components are performed, exciting the 6s(2)[3/2]2(o)→6p(2)[3/2]2 transition at 823.16 nm in XeI and the 5d[4]7/2→6p[3]5/2(o) transition at 834.724 nm in XeII. No significant deviation from the thermal velocity is observed for XeI. Two most probable ion velocities are registered at a given position with respect to the thruster axis, which are mainly attributed to different areas of creation of ions inside the acceleration channel. The spatial resolution of the set-up is limited by the laser beam size (radius of the order of 0.5 mm) and the fluorescence collection optics, which have a view spot diameter of 8 mm.
在一台霍尔效应低功率氙推进器中，于250V放电电压和0.7mg/s阳极流速下进行近出口平面非共振光致荧光光谱分析。对轴向和径向速度分量进行测量，激发XeI中823.16nm处的6s(2)[3/2]2(o)→6p(2)[3/2]2跃迁以及XeII中834.724nm处的5d[4]7/2→6p[3]5/2(o)跃迁。对于XeI，未观察到与热速度有显著偏差。在相对于推进器轴线的给定位置记录到两个最可能的离子速度，这主要归因于加速通道内离子产生的不同区域。该装置的空间分辨率受激光束尺寸（半径约为0.5mm）和荧光收集光学器件限制，其视场光斑直径为8mm。
