The flow structure of ions in a diverging magnetic field has been experimentally studied in an electron cyclotron resonance plasma. The flow velocity field of ions has been measured with directional Langmuir probes calibrated with the laser induced fluorescence spectroscopy. For low ion-temperature plasmas, it is concluded that the ion acceleration due to the axial electric field is important compared with that of gas dynamic effect. It has also been found that the detachment of ion stream line from the magnetic field line takes place when the parameter |fciLB∕Vi| becomes order unity, where fci, LB, and Vi are the ion cyclotron frequency, the characteristic scale length of magnetic field inhomogeneity, and the ion flow velocity, respectively. In the detachment region, a radial electric field is generated in the plasma and the ions move straight with the >E×>B rotation driven by the radial electric field.
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机译：已经在电子回旋共振等离子体中对离子在发散磁场中的流动结构进行了实验研究。离子的流速场已通过使用激光诱导荧光光谱仪校准的定向Langmuir探针进行了测量。对于低离子温度的等离子体，可以得出结论，与气体动力效应相比，轴向电场引起的离子加速非常重要。还发现当参数| fciLB ∕ Vi |时，发生离子流线与磁场线的分离。变为阶次单位，其中fci，LB和Vi分别是离子回旋频率，磁场不均匀性的特征尺度长度和离子流速。在分离区域中，等离子体中产生一个径向电场，并且离子在径向电场的驱动下随着> E ×> B 旋转而笔直移动。
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