Rotation of a strongly coupled dust cluster in plasma by the torque of an electron beam
Rotation of a strongly coupled dust cluster in plasma by the torque of an electron beam
复制标题
等离子体中强耦合尘埃簇通过电子束扭矩旋转
DOI：
10.1103/physreve.103.023210
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发表时间：
2021
影响因子：
2.4
通讯作者：
Ticoş, C. M.
中科院分区：
文献类型：
--
作者：
Ticoş, D.;Scurtu, A.;Williams, J. D.;Scott, L.;Thomas, E.;Sanford, D.;Ticoş, C. M.
由10个尘埃粒子组成的1 mm大小的团簇在脉冲电子束的扭矩作用下旋转，能量范围为8-12keV。尘埃粒子是半径为5.9的带电球体，悬浮在等离子体鞘中，形成一个圆形、平面、库仑耦合的团簇。电子束照射稍微偏离其中心的尘埃团，并在电子阻力的作用下使粒子运动。12keV时的总扭矩是角速度下的Nm。用分子动力学程序模拟了星团内部尘埃粒子的壳层间旋转和游程等主要动力学特征。
A 1-mm-size cluster composed of 10 dust particles immersed in plasma is rotated by the torque of a pulsed electron beam with energy in the range 8–12 keV. The dust particles are electrically charged spheres with radius 5.9and are levitated in the plasma sheath, forming a round, planar, Coulomb-coupled cluster. The electron beam irradiates the dust cluster passing slightly off its center, and sets the particles in motion by the action of the electron drag force. The total torque at 12 keV isNm at an angular speedrad. The main dynamical features of the cluster such as intershell rotation and itinerancy of the dust particles inside the cluster are simulated by using a molecular dynamics code.