Experimental investigation of large-volume PIA plasmas at atmospheric pressure

被引：14

作者：

Brandenburg, JE ^{[1
]}

Kline, JF ^{[1
]}

机构：

[1] Res Support Instruments Inc, Lanham, MD 20706 USA

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 1998年 / 26卷 / 02期

关键词：

electric breakdown; gas discharges; ionization; microwave devices; plasmas;

D O I：

10.1109/27.669616

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Large-volume atmospheric-pressure plasmas have been the subject of previous research as a laboratory simulation of ball lightning, but measurements of the plasma properties have been unavailable. The present investigation employed a nonresonant microwave chamber with a 1000-W microwave source operating at 2.45-GHz frequency to produce large volume (up to 0.8 L) plasmas that persisted after microwave shutoff. A Langmuir probe was used to measure electron density and temperature, and the highest values measured were 10(10) cm(-3) at 0.67 eV, respectively. Plasma lifetimes after microwave shutoff were also measured, using both a photocell and a video camera, and were found to average 200 ms. A working hypothesis of the formation of shared electron orbitals in dense gas discharges is put forth to explain this phenomenon.

引用

页码：145 / 149

页数：5