IEAP, Christian-Albrechts-Universität, 24098 Kiel, Germany.
Phys Rev E. 2018 Mar;97(3-1):033203. doi: 10.1103/PhysRevE.97.033203.
A cloud of nanodust particles is created in a reactive argon-acetylene plasma. It is then transformed into a dusty magnetized argon plasma. Plasma parameters are obtained with the dust-density wave diagnostic introduced by Tadsen et al. [Phys. Plasmas 22, 113701 (2015)10.1063/1.4934927]. A change from an open to a cylindrically enclosed nanodust cloud, which was observed earlier, can now be explained by a stronger electric confinement if a vertical magnetic field is present. Using two-dimensional extinction measurements and the inverse Abel transform to determine the dust density, a redistribution of the dust with increasing magnetic induction is found. The dust-density profile changes from being peaked around the central void to being peaked at an outer torus ring resulting in a hollow profile. As the plasma parameters cannot explain this behavior, we propose a rotation of the nanodust cloud in the magnetized plasma as the origin of the modified profile.
在反应性氩-乙炔等离子体中会产生一团纳米尘埃粒子云。然后，它被转化为带有尘埃的磁化氩等离子体。等离子体参数是通过 Tadsen 等人引入的尘埃密度波诊断获得的[Phys. Plasmas 22, 113701 (2015)10.1063/1.4934927]。如果存在垂直磁场，先前观察到的从开放到圆柱形封闭纳米尘埃云的变化现在可以通过更强的电限制来解释。通过二维消光测量和反 Abel 变换来确定尘埃密度，发现尘埃会随着磁感应的增加而重新分布。尘埃密度分布从中心空洞周围的峰值变为外部环的峰值，从而形成中空轮廓。由于等离子体参数无法解释这种行为，我们提出在磁化等离子体中纳米尘埃云的旋转是导致这种轮廓变化的原因。
