Enhancement of axial momentum lost to the radial wall by the upstream magnetic field in a helicon source
Enhancement of axial momentum lost to the radial wall by the upstream magnetic field in a helicon source
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螺旋源中上游磁场增强径向壁损失的轴向动量
DOI：
10.1088/1361-6587/aa626f
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发表时间：
2017
影响因子：
2.2
通讯作者：
Kazunori Takahashi and Akira Ando
中科院分区：
文献类型：
--
作者：
寺崎英紀;境家達弘;藤川勇志;近藤忠;重森啓介;加藤弘樹;弘中陽一郎;Kazunori Takahashi and Akira Ando
施加到上游后壁，径向源壁，和一个螺旋等离子体推力器，它有一个射频天线的上游和下游的两个双端的磁场的力的单独测量，精确测量。两种不同的结构的磁场线的源进行了测试，其中螺线管电流被提供给要么只有下游螺线管或两个螺线管。据观察，高密度的等离子体存在于上游的射频天线时，两个螺线管供电，而最大密度存在于附近的射频天线时，只有下游螺线管供电。虽然施加到后壁的力增加了两个磁场的情况下，轴向动量损失的径向壁同时增强，然后施加到整个结构的推力器的总力被发现是非常相似的两个磁场配置。结果表明，单独的力的测量提供了有用的信息等离子体动量与物理边界和磁场相互作用。
Individual measurements of forces exerted to an upstream back wall, a radial source wall, and a magnetic field of a helicon plasma thruster, which has two solenoids upstream and downstream of a radiofrequency antenna, are precisely measured. Two different structures of magnetic field lines in the source are tested, where the solenoid current is supplied to either only the downstream solenoid or to both the solenoids. It is observed that the high density plasma exists upstream of the rf antenna when both the solenoids are powered, while the maximum density exists near the rf antenna when only the downstream solenoid is powered. Although the force exerted to the back wall is increased for the two solenoids case, the axial momentum lost to the radial wall is simultaneously enhanced; then the total force exerted to the whole structure of the thruster is found to be very similar for the two magnetic field configurations. It is shown that the individual force measurement provides useful information on the plasma momentum interacting with the physical boundaries and the magnetic fields.