The effect of magnetic field on plasma particles in dusty plasma

Abstract

In this work, we present the investigation of the formation features and internal structure of dust clouds created in plasma of glow discharge in the external magnetic field corresponding to a range of moderate and strong fields, at which the ion component is magnetized. The analysis of the plasma magnetization in the presence of dust components is carried out. We defined the values of magnetic induction at which the changes in dynamics of plasma particles in magnetic field in light inert gases are expected. The experimental setup was built in two versions. For the purpose of generating of magnetic field, the first setup was equipped with ordinary magnetic coils, and the second one included a superconducting solenoid. The discharge tubes, the main chambers where plasma was ignited and maintained in a glow discharge in lowered pressure, also have certain peculiarities, which we describe below. While using helium as a bulk gas, our study focused only on the dust trap in the region of narrowing discharge current. For neon, we used two traps: the striation trap and one just mentioned above placed in the narrowing of the discharge tube. As a result, the steady dust structures in a glow discharge under the magnetization of ions and electrons were obtained for the first time. Dust structures were rotated and tended to form a dust cluster and shell structure. A number of parameters of magnetization achieved in experiments were calculated.

Physics of magnetized dusty plasmas

“…Further, it is observed that, even at relatively low magnetic fields (where still h i < 1 ), ensembles of trapped dust particles rotate as a whole around the magnetic field axis, see e.g. (Nunomura et al 1997;Sato et al 2001;Cheung et al 2003;Carstensen et al 2009;Karasev et al 2006Karasev et al , 2019. The rotation direction usually is in the r × direction where r is the (horizontal, radial, perpendicular) electric field that confines the dust particles transverse to the magnetic field.…”

Molecular dynamics investigation of soliton propagation in a two‐dimensional Yukawa liquid

“…Figure 7 shows that both the positive and negative peaks become trapped, they neither propagate or dissolve by diffusion in the system over the time scale of the simulation. This behavior is the consequence of the well known scenario that diffusion can be strongly blocked by a magnetic field in strongly coupled plasmas [47,[68][69][70][71]. In the trapped state the particles undergo a cyclotron-type motion characterized by the strength of the magnetic field (β).…”

Numerical simulation of magnetization induction coupled discharge plasma discharge process

“…While air pressure induction discharges weren't identified until the 1940s, low-pressure electrodeless discharge experiments began around the end of the 19th century [1][2][3]. Ring releases, once established at low pressure, could be sustained when the pressure increased to atmospheric pressure, according to Babat's 1947 paper [4][5]. As far as we know, inductively linked plasma discharges may be maintained in open tubes with airflow [6][7].…”