Title :
Subnanosecond resonance laser diagnostics of the cathode spot region of low-current vacuum discharge
Author :
Popov, S. ; Vogel, N. ; Jüttner, B.
Author_Institution :
Inst. of High Current Electron., Acad. of Sci., Tomsk, Russia
Abstract :
In this paper, the supplying of neutral atoms of the cathode material into the discharge gap at low-current microsecond vacuum arc with liquid Ga cathode was investigated employing the method of subnanosecond resonance laser diagnostics. It has been shown that vapours ejection has an essentially nonstationary character and it occurs both isotropically and in the form of contracted low-ionized plasma jets with atomic concentration of more than 1017 cm-3.
Keywords :
cathodes; gallium; liquid metals; plasma diagnostics; plasma jets; vacuum arcs; atomic concentration; cathode spot region; contracted low ionized plasma jets; discharge gap; liquid Ga cathode; low current microsecond vacuum arc; low-current vacuum discharge; neutral atoms; nonstationary character; subnanosecond resonance laser diagnostics; vapours ejection; Absorption; Atomic beams; Atomic measurements; Cathodes; Chemical lasers; Optical materials; Plasma materials processing; Plasma properties; Resonance; Vacuum arcs;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 2002. 20th International Symposium on
Print_ISBN :
0-7803-7394-4
DOI :
10.1109/ISDEIV.2002.1027390
