Speaker
Assem Agatayeva
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P5.3008.pdf
Charging processes of dust particles in magnetized gas discharge plasma
A.A. Agatayeva1), N.Kh. Bastykova1), S.K. Kodanova1), T.S. Ramazanov1), S.A. Maiorov2)
1
Institute of Experimental and Theoretical Physics, Al-Farabi Kazakh
National University, Al-Farabi 71, Almaty, 050040, Kazakhstan
2
Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilov
st. 38, Moscow, 119991, Russia
Investigation of the dust particle charging processes is one of the key problems in
dusty plasma physics, that provides the information about charge and interaction potential of
dust particles. This information is necessary for constructing dusty plasma theory, that can
describe the formation, existence, evolution and destruction of ordered plasma-dust
structures[1]. This theory also needed for describing the dynamic phenomena in plasma.
Recent experiments have been conducted to study the charging processes of dust
particles in a magnetized plasma [2]. In the presence of strong magnetic field it is obtained
that the absolute value of dust particle charges is much lower than the estimations of the OML
theoretical model.
In this regard, the purpose of this work is to study the influence of magnetic field on
the dust particle charge in gas-discharge plasma. The influence of magnetic field on the dust
particle charge, on the charge fluctuation and on the charging time are investigated.
The charge of dust particle is determined by the particle-in-cell method and the
collision of ions with atoms is taken into account by the method of Monte Carlo [3,4].
Calculations are made for the following gas discharge plasma parameters: the electron and ion
densities are 109 cm-3, the electron temperature is 3 eV and for ions is 0.03 eV. The charges of
dust particles with the radius of 0.5, 1, 2, 4, 8, 10 μm were calculated at magnetic field values
in the range B = . The dependence of the dust particle charge on time, as well
as their charging time at different values of the magnetic field are obtained.
[1] V.E.Fortov, S.A.Khrapak, A.G.Khrapak, V.I.Molotkov, O.F.Petrov, Dusty plasma , UFN, 174, 495-542
(2004)
[2] U.Konopka, B.lynch, D.Funk and E.Thomas,Jr, Book of abstracts ICPDP, 138 (2017)
[3] S. K. Kodanova, N. Kh. Bastykova, T. S. Ramazanov, and S. A. Maiorov, IEEE Trans. Plasma Sci.,525-527
(2016)
[4] S. K. Kodanova , N. Kh. Bastykova , T. S. Ramazanov, G. N. Nigmetova, and S. A. Maiorov, IEEE Trans.
Plasma Sci., 10.1109/TPS.2017.2763965 (2018)
