Non Invasive Measurement on the Pulsed and Steady-State , High Power MadHeX Helicon Plasma Thruster IEPC-2009-206
Non Invasive Measurement on the Pulsed and Steady-State , High Power MadHeX Helicon Plasma Thruster IEPC-2009-206
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对脉冲和稳态高功率 MadHeX Helicon 等离子推进器的非侵入式测量 IEPC-2009-206
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
J. Scharer
中科院分区：
文献类型：
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作者：
M. Wiebold;J. Scharer
非侵入式测量是在脉冲稳态Ar-Helcon等离子体推进器上进行的，该推力器带有静态轴向磁场喷嘴磁场(1 kg源，1.5 kg喷嘴峰值)。流量在1到76 sccm之间，耦合的13.56 MHz射频功率级别在700 W到10 kW之间。ArⅡ和Ar I的碰撞-辐射(CR)模型分别用于光谱确定电子温度(Te)和中性密度。电子密度(Nemax=8×1013/cm−3)是通过105GHz微波干涉仪测量的，是CR模型的输入。在无碰撞、高度中性的耗尽区域，Te随功率线性上升，而Ne则受到限制。存在压力平衡和压力梯度的区域，并观察到大量轴向加速离子流动的证据。在较低和较高流速下观察到较冷(5 EV)和较热(>；20 eV)电子温度的区域。利用可调谐半导体激光诱导荧光，从源区通过喷嘴测量了这些不同区域的轴向离子能量分布函数及其加速度。
Non-invasive measurements are performed on a pulsed and steady-state argon helicon plasma thruster with a static axial magnetic nozzle field (1 kG source, 1.5 kG nozzle peak). Flow rates are between 1 and 76 sccm with coupled 13.56 MHz rf power levels of between 700 W and 10 kW. Collisional-radiative (CR) models for Ar II and Ar I are used to spectroscopically determine the electron temperature (Te) and the neutral density, respectively. The electron density (nemax= 8 x 10 13 /cm −3 ) is measured via 105 GHz microwave interferometry and is an input to the CR models. In collisionless, highly neutraldepleted regions, Te rises linearly with power while ne remains constrained. Regions of pressure balance and pressure gradients are present, and evidence of substantial axially accelerated ion flows is observed. Regimes where cooler (5 eV) and hotter (>20 eV) electron temperatures are observed for lower and higher flow rates. The axial ion energy distribution function and its acceleration is measured in these different regimes from the source region through the nozzle using tunable diode laser-induced fluorescence.