ARC PLASMA DIAGNOSTICS WITH VACUUM ULTRAVIOLET RADIATION.
CALIFORNIA UNIV LOS ANGELES DEPT OF PHYSICS
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The purpose of this investigation was to study the emission and absorption properties in the vacuum ultraviolet region of the spectrum, between 200A and 2000A, of thermally stabilized cascade arcs. These arcs were operated at about 100 amp and 60 V in either argon, neon or helium at roughly one-third of an atmosphere of pressure. Rapid differential pumping was required at either end of the arc in order to allow vacuum ultraviolet radiation to pass from the arc into a 2 m radius of curvature grazing incidence grating vacuum spectrograph, or alternately to transmit through the arc plasma radiation from a separate light source. Emission and absorption work was limited to feasibility studies because of the long lead-time in establishing an operating plasma arc. These studies proved highly promising, both with respect to vacuum UV emission from the arc and transmission through the arc. Author
- Plasma Physics and Magnetohydrodynamics