Plasma resonance in argon and neon
Haggquist, Grant F., Jr.
Oleson, Norman L.
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Plasma resonance in argon and neon was studied by a microwave method which afforded a measure of the electron number density. Resonance was excited by an R. F. signal transmitted along a strip-line enclosing the discharge tube . The resonance occurrence was determined by measuring the transmitted power as a function of discharge current and exciting frequency . Data are presented showing the current for resonance as a function of resonant frequency for several gas pressures. In argon, measurements were made for pressure in the range from 1 x 10-3 to 5 x 10-2 mm Hg. In neon the pressure range was 1 x 10-2 to 7 x 10-1 mm Hg· The upper pressure limit was determined by the Q of the resonance and the lower limit only by ability to maintain a normal glow discharge. The large pressure range for neon suggests that this method of determining the electron number density should find many applications in work using that gas.
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