Metal vapor segmented discharge tubes

Electric lamp and discharge devices – With temperature modifier – Electric heater

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313245, 313246, 372 34, 372 56, 372 62, H01J 102, H01S 302

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active

045594660

ABSTRACT:
Conventional discharge tubes comprise electrodes within a separate containing vessel. The electrodes are joined to an external circuit by electrical conductors which pass through the vessel wall via an insulated side arm. Such a construction has disadvantages in that careful manufacture is required and it is also difficult to produce a desired distribution of the active medium in a laser and maintain a stable optimum temperature. In an attempt to reduce these problems the invention provides a discharge vessel which comprises electrical conductors and insulators arranged alternately so that a separate discharge vessel is not required. Since the discharge vessel is partially thermally conducting, temperature control is facilitated by its fast response to stabilizing controls, heat being supplied from an external source. When metal is used as all or part of the active medium, the electrodes may be lined on their inner surfaces with the metal and each of the electrodes can be controlled independently from the others to obtain a desired distribution of metal vapor.

REFERENCES:
patent: 3501714 (1970-03-01), Myers et al.
patent: 3742378 (1973-06-01), Timmermans
patent: 3798486 (1974-03-01), Hernquist
patent: 3868593 (1975-02-01), Fukuda et al.
Japanese Journal of Applied Physics, vol. 18, No. 11, Nov. 1979, pp. 2111-2119.
IBM Technical Disclosure Bulletin, vol. 19, No. 9, Feb. 1977, L. W. Bassetti and S. J. Keene, Laser Preheating.

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