Spectroscopic Measurement of the Electron Temperature in the Tenuous Argon Ion Laser Plasma
Date of Award
Master of Science (MS)
George S. Ofelt
Call Number for Print
Special Collections LD4331.P48B52
The validity of the line intensity ratio technique for measuring the electron temperature was examined for an argon plasma with a "population inversion" i.e., the number of ions with electrons in the upper 4p levels was greater than in the lower 4s levels. The line intensities from these levels, the argon ion lasing transitions, were measured in a pulsed tenuous plasma at 110μ Hg produced by discharging a capacitor through a tube 2m long and 7mm inside diameter. The electron impact cross sections for simultaneous excitation and ionization as measured by Latimer and St. John were used and averaged over the velocity distribution of electrons, assumed Maxwellian. The electron temperatures obtained, ranged from 1.0 - 1.7 eV depending on which lines were observed. A theory of the positive column, where wall effects are not considered gives values about twice as high as an upper bound.
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Bicanic, Dane D..
"Spectroscopic Measurement of the Electron Temperature in the Tenuous Argon Ion Laser Plasma"
(1971). Master of Science (MS), Thesis, Physics, Old Dominion University, DOI: 10.25777/5eda-w635