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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Dust-charge fluctuations with non-Maxwellian distribution functions
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Dust-charge fluctuations with non-Maxwellian distribution functions

机译:非麦克斯韦分布函数的粉尘电荷波动

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摘要

Dust grains immersed in a plasma can exhibit charge fluctuations in response to the oscillatory plasma currents flowing onto them. The fluctuation electrodynamics of dusty plasmas are determined by taking into account the dynamics of charging processes associated with plasma currents. Expressions for the charging currents are derived using kappa and generalized (r, q) distribution functions. The dispersion relation of dust-acoustic waves is modified while taking into account these distribution functions. Further, it is found that in the limit (i) r = 0, q -> infinity and (ii) k -> infinity, the expressions of the current modified with (r, q) and kappa distributions reduce to the Maxwellian current.
机译:浸没在等离子体中的尘埃颗粒可能会出现振荡的等离子体电流,从而产生电荷波动。通过考虑与等离子体电流相关的充电过程的动力学来确定尘土等离子体的波动电动力学。充电电流的表达式是使用kappa和广义(r,q)分布函数得出的。考虑到这些分布函数,可以修改尘埃声波的色散关系。另外,发现在极限(i)r = 0,q->无穷大且(ii)k->无穷大时,用(r,q)和κ分布修改的电流的表达式减小为麦克斯韦电流。

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