Carbon dust particles in a beam-plasma discharge

2nd Conference on Plasma & Laser Research and Technologies

Koval, O.A.^1 ; Vizgalov, V.^1 ; Shalpegin, A.V.^1

National Research Nuclear University MEPhI, Kashirskoe highway 31, Moscow

115409, Russia^1

关键词: Average velocity;    Emission intensity;    High potential;    Molecular ions;    Plasma columns;    Plasma conditions;    Plasma discharge;    Potential measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/747/1/012010/pdf
DOI  :  10.1088/1742-6596/747/1/012010

来源: IOP

【 摘 要 】

This paper focuses on dynamics of micro-sized carbon dust grains in beam-plasma discharge (BPD) plasmas. It was demonstrated that injected dust particles can be captured and transported along the discharge. Longitudinal average velocity of the particles in the central area of the plasma column was 17 m/sec, and 2 m/sec in the periphery. Dust injection caused a decrease of emission intensity of metastable nitrogen molecular ion. This effect is suggested for a spectroscopy method for particles' potential measurements. Five-micron radius carbon dust grains obtained potential above 500 V in the experiments on PR-2 installation, proving the feasibility of BPDs for the charging of fine dust particles up to high potential values, unattainable in similar plasma conditions.