Fine-particle clouds controlled in a DC discharge plasma
Fine-particle clouds controlled in a DC discharge plasma
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直流放电等离子体中控制的细颗粒云
DOI：
10.1109/27.923707
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发表时间：
2001
影响因子：
1.5
通讯作者：
N. Sato
中科院分区：
文献类型：
--
作者：
G. Uchida;S. Iizuka;N. Sato
在强耦合状态下，通过改变径向分段电极提供的径向电势分布来控制强耦合状态下细颗粒云的空间形状，以用于完全直流配置下的粒子悬浮和限制。细颗粒云的形状从通常的二维圆盘变为三维圆锥，最后是随着径向势斜率的增加而呈凹形的圆锥。这些分布与分段电极上方离子鞘中径向电势分布的轴向变化密切相关。当我们对分段电极施加一个位于径向中心和边缘之间的峰的电势分布时，细小的颗粒在水平面上重新排列形成方位环。通过改变径向电势分布的峰值宽度来控制环的径向宽度。
The spatial shape of fine-particle clouds in a strongly coupled state is controlled by varying a radial potential profile provided by radially segmented electrode for particle levitation and confinement under a completely DC configuration. Fine-particle clouds change their shapes from a usual two-dimensional disk to a three-dimensional cone, and finally concave cone with an increase in the radial potential slope. These profiles are closely related to an axial variation of the radial potential profile in the ion sheath above the segmented electrode. When we apply to the segmented electrode a potential profile with peaks between the radial center and edge, fine particles are rearranged to form azimuthal rings on the horizontal plane. The radial width of the rings is controlled by changing the peak width of the radial potential profile.