Measurement of the ion drag force on free falling microspheres in a plasma
Measurement of the ion drag force on free falling microspheres in a plasma
复制标题
等离子体中自由落体微球的离子拖曳力的测量
DOI：
10.1063/1.1809642
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发表时间：
2004
影响因子：
2.2
通讯作者：
A. Piel
中科院分区：
文献类型：
--
作者：
M. Hirt;D. Block;A. Piel
本文介绍了在无碰撞条件下，对自由下落尘埃粒子的离子拖曳力进行定量测定的实验。离子拖曳力的离子能量高达40 eV的测量和得到的结果进行了详细的比较与理论。 与巴恩斯模型[巴恩斯等人，物理修订信函68，313（1992）]的高离子能量（E> 3eV）的离子拖曳力。 在较低的离子能量下，Khrapak模型[Khrapak等人，物理修订信函90，225002（2003）]被发现对高电荷粒子捕获缓慢流动的离子给出了更好的描述。
Experiments on the quantitative determination of the ion drag force on free-falling dust particles in a collisionless regime are presented. The ion drag forces are measured for ion energies up to 40 eV and the obtained results are compared in detail with theories. Good agreement is found with the Barnes model [Barnes et al., Phys. Rev. Lett. 68, 313 (1992)] of the ion drag force for high ion energies (E>3 eV). At lower ion energies the model of Khrapak [Khrapak et al., Phys. Rev. Lett. 90, 225002 (2003)] is found to give a better description of the capture of slowly streaming ions by highly charged particles.