Title :
Two-dimensional observation of copper vapor in vacuum arcs by laser-induced fluorescence
Author :
Koyama, Kenichi ; Nakayama, Yasushi ; Ohi, Takeshi ; Horinouchi, Katsuhiko ; Sasao, Hiroyuki
Author_Institution :
Adv. Technol. R&D Center, Mitsubishi Electr. Corp., Hyogo, Japan
fDate :
8/1/1997 12:00:00 AM
Abstract :
The density distribution and the velocity of copper neutral atoms emitted from a single cathode spot in 40 A vacuum arc were measured by the two-dimensional (2-D) laser-induced fluorescence method. The density was calibrated from the two-dimensional fluorescence image observed by a CCD camera. The gap space was almost filled with the copper atoms, and the density reached 5×1019/m3. We varied the wavelength of the laser light and measured the velocity of the copper atoms emitted from the cathode spot using the effect of Doppler shift. The velocity of the copper atoms was about 10 km/s
Keywords :
Doppler effect; Doppler shift; copper; fluorescence; plasma density; plasma diagnostics; vacuum arcs; velocity; 10 km/s; CCD camera; Cu; Cu vapor; Doppler shift; cathode spot; density distribution; gap space; laser-induced fluorescence; two-dimensional observation; vacuum arcs; velocity; Atom lasers; Atomic beams; Atomic measurements; Cathodes; Copper; Density measurement; Fluorescence; Two dimensional displays; Vacuum arcs; Velocity measurement;
Journal_Title :
Plasma Science, IEEE Transactions on
