单极性带电粒子浓度测试方法的研究

Study on measurement of concentration of uni-polarity particles

提出一种新型球形传感器探测仪,在不同风速、不同激励场强以及不同测试点的情况下对大气压下电晕放电形式产生的带电粒子浓度进行了测量,并分析了等离子体的空间分布情况,同时与DLY型空气离子测量仪的测试结果进行比较.实验结果表明,球形探测仪对带电粒子浓度的测试结果较为理想,同时,设备操作简单,占用空间小,便于局部定点测量,为研究等离子体的空间分布提供了条件.

At present, the methods using parallel plates and probes for detecting the plasma in the strong field have some limitations in measuring the charged particles produced by gas with high flow rate at atmospheric pressure. In this paper, a new detector with a spherical probe was proposed and was used to measure the charged particle concentration under the conditions of various gas velocities, electric field intensities and distances, as well as to study the spatial distribution of plasma. The result of the new method when was compared with that of DLY air ion detector indicates that the concentration detected by the former is near to the real value. Moreover, the detector with a spherical probe has advantages of as simple operation, small volume and convenience of local test, which contribute to the research of spatial distribution of plasma.