AN ATTEMPT TO MEASURE ELECTRIC FIELD IN A D.C. GLOW DISCHARGE USING SUB-DOPPLER INFRARED SPECTRUM OF CH3F
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Date
1986
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Ohio State University
Abstract
Plasma diagnostics using laser spectrometers has been successful in measuring ion mobility(1), ion density distribution(2) and high electric field in the cathode region(3). We have attempted to measure the electric field in situ in the positive column of D.C. glow discharges by observing first order Stark splitting of CH3F Lamb dips using CO2-Microwave side band spectrometer. The strong R(4,3) transition gave clear Lamb-dip signals for the pressure range from 10 to 60 mTorr (approximately) in discharges and was used as the monitor. Varying discharge conditions and two air cooled discharge cells were used. No Stark splitting was observed even with discharge voltage of up to 24kV.
Description
$^{1}$. N.N.Haese,F.Pan and T.Oka, Phys. Rev. Letter,50,1575(1983). $^{2}$. F.Pan and T.Oka, to be published (1986). $^{3}$. C.A.Moore, G.P.Davis and R.A.Gottscho, Phys. Rev. Letter,52, 538 (1984). Department of Chemistry and Astronomy \& Astrophysics, the University of Chicago, Chicago, IL.60637.
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