Title :
Arc cathode spots: Their mechanism and motion
Author :
Schrade, Herbert O.
Author_Institution :
Inst. fuer Raumfahrtsyst., Stuttgart Univ., West Germany
fDate :
10/1/1989 12:00:00 AM
Abstract :
Arc spots are usually highly unstable and jump statistically over the cathode surface. In a magnetic field parallel to the surface, they preferably move in the retrograde direction, i.e., opposite to the Lorentzian rule. If the field is inclined with respect to the surface, the spots drift away at a certain angle with respect to the proper retrograde direction (Robson drift motion). The phenomenon are explained by a unique stability theory
Keywords :
arcs (electric); plasma transport processes; Lorentzian rule; Robson drift motion; arc cathode spots; cathode surface; highly unstable system; magnetic field; retrograde direction; stability theory; statistical jump; Cathodes; Electric breakdown; Electron emission; Equations; Helium; Magnetic fields; Plasma density; Plasma materials processing; Stability; Surface discharges;
Journal_Title :
Plasma Science, IEEE Transactions on
