Radio frequency induced plasma excitation of optical emission sp

Details Radio frequency induced plasma excitation of optical emission sp Radio frequency induced plasma excitation of optical emission sp

1974-07-10

1976-05-25

McGraw, Vincent P.

Optics: measuring and testing

Range or remote distance finding

With photodetection

219121P, 3151115, 356248, 356 79, G01J 330

Patent

active

039588831

ABSTRACT:
In a spectroscopic apparatus, a desolvated aerosol containing sample impurities to be analyzed is introduced into the center of a toroidal shaped plasma which is excited by an inductively coupled radio frequency power oscillator characterized by a single resonant circuit comprising an induction coil and its associated tuning capacitor, the plasma being produced by passing a gas stream along the axis of the induction coil. The single resonant circuit defined by the interconnection between the plate tank circuit and the grid tank circuit of the radio frequency power oscillator is such as to provide a common inductance for both circuits and to furnish power output and feedback for maintaining oscillation, whereby any detuning caused by introduction of the desolvated aerosol into the plasma does not affect the level of power transfer over a wide range.

REFERENCES:
patent: 3467471 (1969-09-01), Greenfield et al.
patent: 3633990 (1972-01-01), Baierlein
patent: 3846024 (1974-11-01), Turner

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