Fractal dimension of cathode spots in a high-current vacuum arc thruster

被引：5

作者：

Michaux, Etienne ^{[1
]}

Vinci, Alfio E. ^{[1
]}

Mazouffre, Stephane ^{[1
]}

机构：

[1] CNRS, Inst Combust Aerotherm React & Environm ICARE, 1C Ave Rech Sci, F-45071 Orleans, France

来源：

VACUUM | 2023年 / 215卷

基金：

欧盟地平线“2020”;

关键词：

Vacuum arc thruster; Fractals; Metallic materials; High current; Pulsed discharge; Electric propulsion for spacecraft;

D O I：

10.1016/j.vacuum.2023.112286

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fractal dimension of cathode spots occurring in the discharge of a high-current vacuum arc thruster (VAT) are determined according to the Minkowski-Bouligand method. Photographs taken during operation of a 30 W VAT allowed observation of spots distribution over the surface depending on the cathode material. A machine learning model as well as a heuristic analysis permit to outline that work function, cohesive energy and ionization energy of the cathode material are the main driver in the magnitude of fractal dimension and total surface area covered by the spots.

引用

页数：9

共 41 条

[1] Effects of surface treatments on photoelectric work function of silver-nickel alloys [J].