2018 年 13 巻 p. 3401044
In order to study a new method of generating energetic ion, a linear plasma device NUMBER was designed and constructed. The device consists of a plasma production region and a test region connected axially. The radial profile of the electron density and the electron temperature were measured using a Langmuir probe. The radius of plasma is consistent with a field line trace calculation. The time evolution of the ion saturation current Iis was measured. A high Iis phase accompanied by rapid increase and rapid decrease of Iis was observed. From the scan of magnetic field in the test region, it is found that the high Iis phase may be caused by unexpected electron cyclotron resonance in the test region. The gas pressure is also related to the appearance of the high Iis phase.
