The theory of Townsend discharge under resonant laser action is presented. 本文给出了共振激光作用下的汤生放电理论。
Transient current analysis in Townsend discharge with various kinds of metastables 关于存在多种亚稳态时的Townsend放电瞬态过程分析
Using the relationship between V and Pd in Townsend discharge, the uncertainty of its appearance and the mechanism of the increasing voltage suppressing method can be explained. 不明放电不定时性和升高端电压抑制放电的机理,可以用发生Townsend放电时击穿电压V与气压和距离的乘积Pd之间的帕邢定律来解释。
The simulation results show that the discharge in N_2 appears mostly as a low-pressure Townsend discharge. 模拟结果显示,氮中的放电具有低气压下汤生放电的特性。
According to the electron collision ionization theory of Townsend, the electron avalanche is the basic process in gas discharge. 根据汤逊电子碰撞电离理论,电子崩是气体放电最基本的过程。
Brief introduction of Townsend discharge 汤生放电理论的简介
Seed electrons needed in discharge are mainly provided by Penning ionizations between metastable molecules. This regime results in a low ionization level, which makes the discharge in N_2 being close to a Townsend discharge. 放电所需的种子电子主要由亚稳态之间潘宁电离提供,这种机理使放电的电离水平较低,导致氮气中的放电只能是汤生放电。
From the fundamental point of view, the Townsend discharge theory and the streamer theory were respectively analyzed and examined. 从基本观点,对汤森气体放电理论和流柱击穿理论进行了分析和探讨,指出了其中的弱点和不足。
The investigation of this phenomenon and the set up of the Theory for the conversion were carried out by Townsend at the beginning of last century, thus it is called Townsend Discharge Theory. 这种放电现象与理论由科学家汤生在上世纪初首先研究建立,故称为汤生放电。
The main experimental results are discrepant from the Townsend discharge model. 指出实验结果与汤生放电模型的偏离。
The numerical simulations show that when the driven frequency increases in the range ( 1 kHz-100 kHz), three discharge modes, Townsend discharge, glow discharge, and local glow discharge, appear in turn. 模拟结果显示,在一定范围内(1kHz-100kHz)提高外加电源频率,先后出现了三种放电模式&汤森放电、辉光放电和局部辉光放电。
Over the past decade, the atmospheric pressure homogeneous dielectric barrier discharge research focus mainly on the glow and Townsend discharge which is charateristiced as the absent of micro-discharge. 近十年来,大气压均匀DBD成了研究热点。目前研究的大气压均匀DBD主要是指不存在微放电的辉光和汤森放电,这种放电通常要求单一气体。
It is found that the Townsend mode turns into the glow mode when the external voltage increases over a certain critical value. With the increase of the external voltage, the transition characteristics of discharge current density and gas voltage in both Townsend and glow discharges are obtained. 研究还发现了提高外加电压幅值,汤森放电阶段、辉光放电阶段以及模式转化时,放电电流与气体电压变化特征。