Novel approach for particle velocity and size measurement under plasma conditions
Novel approach for particle velocity and size measurement under plasma conditions
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等离子体条件下颗粒速度和尺寸测量的新方法
DOI：
10.1063/1.1140242
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
M. Boulos
中科院分区：
文献类型：
--
作者：
T. Sakuta;M. Boulos
提出了一种新的技术，用于在等离子体条件下同时测量单个颗粒的速度和尺寸。该方法是基于每个粒子通过其自身的发射和分析，在时域中，产生的光脉冲的波形，因为它通过一个已知尺寸的观察窗口的观察。对影响氩等离子体中粒子可见度的参数进行了理论分析，结果表明，随着背景等离子体温度的升高，粒子的热可见度因子将随粒子直径和表面温度的不同而从1.0急剧下降到几乎为零。在大气压和软真空条件下（p=760和150 Torr），将镍颗粒（dp=78 μm，σ=18.0 μm）轴向注入以氩气为等离子体气体的电感耦合射频等离子体（f=3 MHz，P=15 kW）中进行测量。计算结果与实验结果吻合较好。
A novel technique is proposed for the simultaneous, in‐flight, measurement of the velocity and size of individual particles under plasma conditions. The method is based on the observation of each particle through its own emission and the analysis, in the time domain, of the waveform of the light burst generated as it crosses an observation window of known dimensions. A theoretical analysis of the parameters affecting the visibility of the particles in an argon plasma showed that depending on the particle diameter and its surface temperature, its thermal visibility factor will drop sharply from 1.0 to almost zero, with the increase of the background plasma temperature. Measurements are carried out using nickel particles (dp=78 μm, σ=18.0 μm) injected axially into an inductively coupled rf plasma ( f=3 MHz, P=15 kW) operated using argon as the plasma gas at atmospheric pressure and under soft vacuum conditions (p=760 and 150 Torr). The results are in good agreement with particle velocity data obtained usin...