Abstract

The results covered in this paper provide breakdown data represented by Paschen curves for methanol, isopropanol and n-butanol, along with the corresponding axial profiles of emission in Townsend regime of the discharge and including the optical emission spectra. Paschen curves were recorded in the range of pd (pressure x electrode gap) from 0.10 to 3.00 Torr cm. The optical emission spectra (OES) are recorded for wavelength range from 300 to 900 nm, for discharges in all studied alcohols. The recorded spectra enabled identification of species that participate in these discharges. All three alcohols exhibit emission from excited radicals OH (at 306.4 nm), CH (at 431.2 nm) and Hα (at 656.4 nm) produced mostly in dissociative excitation by electrons. Recorded profiles of emission enabled us to identify conditions where processes induced by heavy particles (ions and fast neutrals) are dominant in inducing emission from the discharge.

Graphical abstract

中文翻译：

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酒精蒸气中的低压直流击穿

摘要

本文涵盖的结果提供了由甲醇，异丙醇和正丁醇的帕申曲线表示的击穿数据，以及放电在汤森德状态下的相应轴向发射曲线，包括光学发射光谱。在0.10至3.00托厘米的pd（压力×电极间隙）范围内记录Paschen曲线。记录了300至900 nm波长范围内所有被研究的醇的放电的光学发射光谱（OES）。记录的光谱能够识别参与这些放电的物种。所有三种醇表现出从激发自由基OH（在306.4纳米），CH（在431.2纳米）和H发射α（在656.4 nm处）主要由电子进行解离激发产生。记录的排放概况使我们能够确定由重粒子（离子和快速中性粒子）诱导的过程在诱导排放中占主导地位的条件。

图形概要