Current-voltage characteristics and mechanisms of electron emission from cold cathodes in a helium discharge

被引：4
作者：
Bokhan, P. A. [1 ]
Gugin, P. P. [1 ]
Lavrukhin, M. A. [1 ]
Kim, V. A. [1 ]
Shevchenko, G., V [1 ]
Zakrevsky, D. E. [1 ]
机构：
[1] Novosibirsk State Tech Univ, Novosibirsk, Russia
来源：
PLASMA SOURCES SCIENCE & TECHNOLOGY | 2022年 / 31卷 / 12期
基金：
俄罗斯科学基金会;
关键词：
current; voltages; characteristics; mechanisms; electron; emissions; ABNORMAL GLOW-DISCHARGES; BEAM GENERATION; CURRENT-DENSITY; RUNAWAY; GAS; IONIZATION; SURFACE; FALL; FEATURES; VACUUM;
D O I：
10.1088/1361-6595/acaac6
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：
The abnormal discharge (AD) in pure helium and in helium containing molecular impurities was investigated. The obtained results were compared with the parameters of wide-aperture AD and different variants of 'open' discharge. It was shown that in all of the investigated types of discharges the current-voltage characteristics (CVCs) and, correspondingly, the emission properties of cold cathodes are determined mainly not by their material, but by the doping of cathodes with atoms of working gases and the purity of experimental conditions. With the impurity content less than 10(-4)% of the helium atom concentration, the CVCs begin to acquire S-shaped form, which is associated with a change in the electron emission mechanism. It was shown that the diversity of the CVCs is caused by uncertainty in the values of the secondary electron emission coefficients gamma and the electron multiplication coefficient alpha in the cathode layer at reduced electric field strength E/N > 3 Td. The reproducibility of CVCs and, correspondingly, emission properties of cathodes can be ensured by high purity of the working gas and by maintenance of the cathode doping only by the working gas atoms.
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页数：16
相关论文
共 54 条
[1]   Means for efficient electron beam generation in wide-aperture open-discharge light sources [J].
Bokhan, A. P. ;
Bokhan, P. A. ;
Zakrevsky, D. E. .
PLASMA PHYSICS REPORTS, 2006, 32 (07) :549-562
[2]   Peculiarities of electron emission from the cathode in an abnormal glow discharge [J].
Bokhan, AP ;
Bokhan, PA ;
Zakrevsky, DE .
APPLIED PHYSICS LETTERS, 2005, 86 (15) :1-3
[3]   Specific features of wide-aperture glow discharge in helium [J].
Bokhan, P. A. ;
Zakrevsky, Dm. E. .
TECHNICAL PHYSICS LETTERS, 2007, 33 (10) :847-850
[4]   Surface condition and electron emission from cold cathodes in vacuum and in noble gas glow discharge [J].
Bokhan, P. A. ;
Zakrevsky, D. E. .
TECHNICAL PHYSICS, 2007, 52 (01) :104-112
[5]   Investigation of the characteristics and mechanism of subnanosecond switching of a new type of plasma switches. I. Devices with counter-propagating electron beams-kivotrons [J].
Bokhan, P. A. ;
Gugin, P. P. ;
Lavrukhin, M. A. ;
Zakrevsky, D. E. ;
Schweigert, I., V ;
Alexandrov, A. L. .
PLASMA SOURCES SCIENCE & TECHNOLOGY, 2020, 29 (08)
[6]   Study of the Properties of an Anomalous Glow Discharge Generating Electron Beams in Helium, Oxygen, and Nitrogen [J].
Bokhan, P. A. ;
Gugin, P. P. ;
Zakrevsky, D. E. ;
Lavrukhin, M. A. .
PLASMA PHYSICS REPORTS, 2019, 45 (11) :1035-1052
[7]   Specific Features of the I-V Characteristics and High-Efficiency Electron-Beam Generation in a Continuous Open Discharge [J].
Bokhan, P. A. ;
Gugin, P. P. ;
Zakrevskii, Dm. E. .
TECHNICAL PHYSICS LETTERS, 2018, 44 (12) :1092-1095
[8]   On physical processes in an 'open' discharge [J].
Bokhan, P. A. .
PHYSICS-USPEKHI, 2018, 61 (12) :1241-1247
[9]   Noble-gas resonant radiation effects on electron emission in plasma devices [J].
Bokhan, P. A. ;
Zakrevsky, Dm. E. .
PHYSICAL REVIEW E, 2013, 88 (01)
[10]  
Bokhan P. A., 1985, Soviet Physics - Technical Physics, V30, P50
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