Title :
Resonant atomic interfero- and shadowgraphy of vacuum arc with gallium cathode
Author :
Batrakov, Alexander ; Jüttner, Burkhard ; Popov, Sergey ; Proskurovsky, Dmitry ; Vogel, Nadja
Author_Institution :
Siberian Div., Russian Acad. of Sci., Tomsk, Russia
Abstract :
The mechanism of the emission of neutral atoms of the cathode material into the discharge gap of a microsecond low-current vacuum arc with a liquid Ga cathode has been investigated by the method of subnanosecond resonance laser interfero- and shadowgraphy. It has been shown that the cathode material vaporization has a pronounced nonstationary character and occurs both isotropically and in the form of constricted weakly ionized jets with the atom concentration in a jet over 1017cm-3.
Keywords :
gallium; liquid metals; plasma diagnostics; vacuum arcs; atom concentration; cathode material vaporization; constricted weakly ionized jets; discharge gap; liquid Ga cathode; neutral atoms; nonstationary character; resonant atomic interferography; shadowgraphy; vacuum arc; Absorption; Atomic beams; Atomic measurements; Cathodes; Optical materials; Plasma diagnostics; Plasma materials processing; Plasma properties; Resonance; Vacuum arcs;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2003.818430
