Slowing down of charged particles in the dusty plasmas with a non-thermal velocity alpha-distribution

TL;DR

This paper investigates how non-thermal velocity distributions in dusty plasmas affect the slowing down of charged particles, revealing that non-thermal effects significantly alter deceleration and slowing down times compared to Maxwellian plasmas.

Contribution

It derives the deceleration factor and slowing down time for charged particles in non-thermal dusty plasmas using Fokker-Planck theory, highlighting the impact of non-thermal velocity distributions.

Findings

Deceleration factor peaks at certain mean velocities.

Slowing down time decreases with higher non-thermal alpha-parameters.

Non-thermal dusty plasmas have shorter slowing down times than Maxwellian plasmas.

Abstract

The slowing down of a charged particle beam passing through the dusty plasma with a non-thermal velocity alpha-distribution is studied. By using the Fokker-Planck collision theory, we derive the deceleration factor and slowing down time and make the numerical analyses. We show that the non-thermal velocity alpha-distributions of the plasma components have a significant effect on the slowing down. With increase of the mean velocity, the deceleration factor increases rapidly, reaches a peak and then decreases gradually. And the entire peak of the deceleration factor moves generally to the right with the increase of the alpha-parameter. The slowing down time decreases with the increase of the non-thermal alpha-parameter, and so the slowing down time in the non-thermal dusty plasma is generally less than that in a Maxwellian one.