Apparatus for exciting a plasma in a column of gas by means of m

Details Apparatus for exciting a plasma in a column of gas by means of m Apparatus for exciting a plasma in a column of gas by means of m

1986-03-28

1987-10-06

Scott, Jr., Leon

Coherent light generators

Particular pumping means

Pumping with optical or radiant energy

372 61, 372 56, 372 64, H01S 303

Patent

active

046988220

ABSTRACT:
A waveguide (130) is coupled to a tubular member (2) by a gap (139) suitable for generating an intense surface wave in a gaseous mixture contained in the tubular member (2). Short circuits (110 and 120) delimit the plasma, thereby generating very high intensity standing microwaves, which increase the energy density of the plasma. An ion laser effect can then be observed, in particular in a mixture of argon and helium, together with optional krypton.

REFERENCES:
patent: 3493845 (1970-02-01), Bramley
patent: 3753149 (1973-08-01), Kindl et al.
patent: 4477907 (1984-10-01), McMahan
Moutoulas et al., "A High Frequency Surface Wave Pumped He-Ne Laser", Appl. Phys. Lett. 46(4), Feb. 15, 1985.
Bertrand et al., "Comparison of Two New Microwave Plasma Sources for HF Chemical Lasers", IEEE JQE vol. QE-14, No. 1, Jan. '78.
Kato et al., "Microwave Pulsed Excited Argon Ion Laser", Electronics & Comm. in Japan, vol. 55-c, No. 7, 1972.
Moisan et al., "Theory and Characteristics of an Efficient Surface Wave Launcher (Surfatron) Producing Long Plasma Columns", J. Phys. D. Appl. Phys., vol . 12, 1979.

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