Central collisions of charged dust particles in a plasma
Central collisions of charged dust particles in a plasma
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DOI：
10.1103/physrevlett.79.1269
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发表时间：
1997-08
影响因子：
8.6
通讯作者：
U. Konopka;L. Ratke;H. Thomas
中科院分区：
文献类型：
--
作者：
U. Konopka;L. Ratke;H. Thomas
射频等离子体中的弹性尘埃粒子粒子相互作用提供了一种不依赖于等离子体参数知识的电荷测量方法。假设在固定的等离子体条件下，每个粒子周围都有一个屏蔽库仑势，电荷和屏蔽长度可以从两个碰撞粒子的轨迹中计算出来。用这种方法，我们确定了射频放电鞘层中尘埃粒子的电荷和屏蔽长度。该方法也可用于以尘埃粒子为局部探针的等离子体参数测定。{版权} {美国物理学会}
Elastic dust particle particle interaction in an rf plasma provides a charge measurement method independent of the knowledge of plasma parameters. Assuming a screened Coulomb potential surrounding each particle with a constant charge at fixed plasma conditions, the charge and the screening length can be calculated from the trajectories of two colliding particles. With this method, we determine the charge and screening length of dust particles in the sheath of an rf discharge. The method can also be used to determine plasma parameters taking the dust particles as local probes. {copyright} {ital 1997} {ital The American Physical Society}