Self-diffusion in two-dimensional quasimagnetized rotating dusty plasmas
Self-diffusion in two-dimensional quasimagnetized rotating dusty plasmas
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DOI：
10.1103/physreve.99.013203
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发表时间：
2019-01-10
影响因子：
2.4
通讯作者：
Donko, Z.
中科院分区：
文献类型：
--
作者：
Hartmann, P.;Reyes, J. C.;Donko, Z.
利用分子动力学模拟方法，对二维尘埃等离子体在极强(有效)磁场作用下的自扩散现象进行了实验研究。在实验中，通过旋转粒子云并在共转坐标系中观察粒子轨迹来引入强磁场，从而使有效磁场达到3000T。实验结果证实了模拟的预测：(I)在中间时间尺度上发现了超扩散行为；(Ii)自扩散系数与磁场的关系得到了很好的重现。
The self-diffusion phenomenon in a two-dimensional dusty plasma at extremely strong (effective) magnetic fields is studied experimentally and by means of molecular dynamics simulations. In the experiment the high magnetic field is introduced by rotating the particle cloud and observing the particle trajectories in a corotating frame, which allows reaching effective magnetic fields up to 3000 T. The experimental results confirm the predictions of the simulations: (i) superdiffusive behavior is found at intermediate timescales and (ii) the dependence of the self-diffusion coefficient on the magnetic field is well reproduced.