DocumentCode :
1538508
Title :
The behavior of vacuum arc discharges on hydrogen impregnated electrodes
Author :
Logatchev, Alexander A. ; Afanas´ev, Vasiliy P. ; Shkol´nik, Sergey M. ; Jüttner, Burkhard ; Pursch, Heinz
Author_Institution :
A.F. Ioffe Physicotech. Inst., Acad. of Sci., St. Petersburg, Russia
Volume :
27
Issue :
4
fYear :
1999
Firstpage :
894
Lastpage :
900
Abstract :
This paper reports on experimental studies of the behavior of vacuum arcs at hydrogen impregnated electrodes. The arc discharges were analyzed by high speed photography, open shutter photography, measurement of arc voltage and current, and measurements of the erosion in dependence on the level of impregnation for a wide range of arc currents. The results show that impregnation of electrodes with hydrogen reduces the erosion rate, causes smaller crater dimensions, changes the macroparticle size, and decreases the current per spot. For a given current the arc voltage depends on the degree of impregnation. At low current it decreases with increasing impregnation. Furthermore, the arc discharge burns more stable on impregnated electrodes. The total erosion rate decreases significantly due to the reduction of the droplet fraction. The spot movement is faster than on nonimpregnated electrodes.
Keywords :
electrodes; hydrogen; photographic applications; plasma-wall interactions; vacuum arcs; arc discharge burn; arc voltage; crater dimensions; current measurement; droplet fraction; erosion; erosion rate; high speed photography; hydrogen impregnated electrodes; impregnation; macroparticle size; nonimpregnated electrodes; open shutter photography; spot movement; total erosion rate; vacuum arc discharges; Arc discharges; Cathodes; Current measurement; Electrodes; Hydrogen; Photography; Titanium; Vacuum arcs; Velocity measurement; Voltage;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/27.782256
Filename :
782256
Link To Document :
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