Charge distribution on dust particles of space plasma

2003 ◽  
Vol 9 (4) ◽  
pp. 67-72 ◽  
Author(s):  
Yu.O. Klymenko ◽  
◽  
О.К. Cheremnykh ◽  
Keyword(s):  
Charge Distribution ◽  
Space Plasma ◽  
Dust Particles

Effects of charge dispersion in dusty plasmas

1995 ◽  
Vol 54 (3) ◽  
pp. 373-391 ◽  
Author(s):  
T. K. Aslaksen
Keyword(s):  
Charge Distribution ◽  
Dusty Plasmas ◽  
Dust Particles ◽  
Dust Charge ◽  
Kinetic Effects ◽  
Current Equation

We investigate the charge-dispersive effects on a sheath of monosized dust particles in equilibrium. This is done through describing the dust particles by using equations in (x, v) space (kinetic space) that include terms originating from the charge distribution of the dust particles. The charge-dispersive terms are assumed to be completely determined by the local charging processes. We find that the effects due to these terms are opposed by the ordinary gradient terms in the current equation in kinetic space, and they are therefore smaller than first expected. We also identify kinetic effects that are not included in the usual expression for the dust charge in hydrodynamic space.

Complex charge distributions of dielectric dust grains due to plasma flow

2000 ◽  
Vol 63 (3) ◽  
pp. 269-283 ◽  
Author(s):  
J. W. MANWEILER ◽  
T. P. ARMSTRONG ◽  
T. E. CRAVENS
Keyword(s):  
Charge Distribution ◽  
Large Fraction ◽  
Dusty Plasmas ◽  
Young Stars ◽  
Dust Particles ◽  
Total Charge ◽  
Dust Grains ◽  
Charge Distributions ◽  
Flowing Plasma ◽  
Dust Grain

We examine the charging of dielectric dust grains embedded in a plasma. Our work is a continuation and refinement of our previous research into grain charging problems. In 1993, we discussed preliminary simulation results regarding the charging and intergrain forces between two dielectric dust particles [J. W. Manweiler et al., Adv. Space Res. 13, 10175 (1993)]. Then, in 1996, we discussed preliminary results with respect to dust grain charging within asymmetric plasma conditions and how these affect grain–grain collisional cross-sections [J. W. Manweiler et al., In: The Physics of Dusty Plasmas (ed. P. K. Shukla et al.), p. 22. World Scientific, Singapore (1996)]. This work was extended to evaluate how asymmetric charging affects coagulation rates for dielectric dust grains [J. W. Manweiler et al., In: Physics of Dusty Plasmas, 7th Workshop (ed. M. Horanyi et al.), p. 12. AIP Conf. Proc. 446 (1998)]. Here we report on the results of a significant refinement to our work to study the behaviour of a dielectric dust grain in a plasma with a bulk flow. Since charge transport is inhibited on our dielectric grains, we can examine how asymmetric plasma distributions affect the symmetry of the charge distributions that develop on the surfaces of the grains. A dielectric dust grain in a flowing plasma develops a negative total charge and a dipole moment in its charge distribution that points upstream. We also use this model to study how the presence of a nearby dust grain affects the development of a grain's charge distribution. We demonstrate that a smaller grain–grain separation results in a reduced net charge on each grain. For grains in a flowing plasma, dipole moments are unaffected by close approach except when one grain is directly in the ‘wake’ of the other grain. The studies here show that monopole and dipole electrostatic forces are present when dust is bathed in flowing plasma. Recent infrared studies suggest that a large fraction of young stars have dusty envelopes [G. Schilling, Science286, 66 (1999)]. In the formation of accretion discs around young stars, dust–plasma interactions are probably important. Full details on the calculations of the results discussed in this paper are summarized from a more complete treatment of the subject by Manweiler [PhD Dissertation, University of Kansas (1997)].

Dynamics of dust particles in a magnetized plasma sheath in a fully ionized space plasma

2003 ◽  
Vol 10 (9) ◽  
pp. 3733-3745 ◽  
Author(s):  
S. K. Baishya ◽  
G. C. Das
Keyword(s):  
Space Plasma ◽  
Plasma Sheath ◽  
Magnetized Plasma ◽  
Dust Particles

Charge distribution features of fine-dispersed dust grains in low-temperature space plasma

2003 ◽  
Vol 8 (5-6) ◽  
pp. 130-135
Author(s):  
Yu.O. Klymenko ◽  
◽  
О.К. Cheremnykh ◽  
Keyword(s):  
Low Temperature ◽  
Charge Distribution ◽  
Space Plasma ◽  
Dust Grains ◽  
Distribution Features

Statistical charge distribution over dust particles in a non-Maxwellian Lorentzian plasma

2014 ◽  
Vol 21 (7) ◽  
pp. 073706 ◽  
Author(s):  
S. K. Mishra ◽  
Shikha Misra
Keyword(s):  
Charge Distribution ◽  
Dust Particles

Charge distribution over dust particles in a flowing plasma

2011 ◽  
Vol 18 (10) ◽  
pp. 103708 ◽  
Author(s):  
S. K. Mishra ◽  
Shikha Misra ◽  
M. S. Sodha
Keyword(s):  
Charge Distribution ◽  
Dust Particles ◽  
Flowing Plasma
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