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Title: Metal vapor laser including hot electrodes and integral wick

Abstract

A metal vapor laser, specifically one utilizing copper vapor, is disclosed herein. This laser utilizes a plasma tube assembly including a thermally insulated plasma tube containing a specific metal, e.g., copper, and a buffer gas therein. The laser also utilizes means including hot electrodes located at opposite ends of the plasma tube for electrically exciting the metal vapor and heating its interior to a sufficiently high temperature to cause the metal contained therein to vaporize and for subjecting the vapor to an electrical discharge excitation in order to lase. The laser also utilizes external wicking arrangements, that is, wicking arrangements located outside the plasma tube.

Inventors:
 [1];  [2]
  1. (Livermore, CA)
  2. (Tracy, CA)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
869782
Patent Number(s):
US 5396513
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
metal; vapor; laser; including; hot; electrodes; integral; wick; specifically; utilizing; copper; disclosed; utilizes; plasma; tube; assembly; thermally; insulated; containing; specific; buffer; gas; therein; means; located; opposite; electrically; exciting; heating; interior; sufficiently; temperature; contained; vaporize; subjecting; electrical; discharge; excitation; lase; external; wicking; arrangements; outside; tube containing; buffer gas; electrodes located; means including; electrical discharge; copper vapor; plasma tube; vapor laser; metal vapor; contained therein; located outside; assembly including; thermally insulated; tube assembly; laser utilizes; gas therein; discharge excitation; metal contained; including hot; specific metal; /372/

Citation Formats

Ault, Earl R., and Alger, Terry W.. Metal vapor laser including hot electrodes and integral wick. United States: N. p., 1995. Web.
Ault, Earl R., & Alger, Terry W.. Metal vapor laser including hot electrodes and integral wick. United States.
Ault, Earl R., and Alger, Terry W.. 1995. "Metal vapor laser including hot electrodes and integral wick". United States. doi:. https://www.osti.gov/servlets/purl/869782.
@article{osti_869782,
title = {Metal vapor laser including hot electrodes and integral wick},
author = {Ault, Earl R. and Alger, Terry W.},
abstractNote = {A metal vapor laser, specifically one utilizing copper vapor, is disclosed herein. This laser utilizes a plasma tube assembly including a thermally insulated plasma tube containing a specific metal, e.g., copper, and a buffer gas therein. The laser also utilizes means including hot electrodes located at opposite ends of the plasma tube for electrically exciting the metal vapor and heating its interior to a sufficiently high temperature to cause the metal contained therein to vaporize and for subjecting the vapor to an electrical discharge excitation in order to lase. The laser also utilizes external wicking arrangements, that is, wicking arrangements located outside the plasma tube.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1995,
month = 1
}

Patent:

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  • A metal vapor laser, specifically one utilizing copper vapor, is disclosed herein. This laser utilizes a plasma tube assembly including a thermally insulated plasma tube containing a specific metal, e.g., copper, and a buffer gas therein. The laser also utilizes means including hot electrodes located at opposite ends of the plasma tube for electrically exciting the metal vapor and heating its interior to a sufficiently high temperature to cause the metal contained therein to vaporize and for subjecting the vapor to an electrical discharge excitation in order to lase. The laser also utilizes external wicking arrangements, that is, wicking arrangementsmore » located outside the plasma tube. 5 figs.« less
  • An improved wick for a metal vapor laser is made of a refractory metal cylinder, preferably molybdenum or tungsten for a copper laser, which provides the wicking surface. Alternately, the inside surface of the ceramic laser tube can be metalized to form the wicking surface. Capillary action is enhanced by using wire screen, porous foam metal, or grooved surfaces. Graphite or carbon, in the form of chunks, strips, fibers or particles, is placed on the inside surface of the wick to reduce water, reduce metal oxides and form metal carbides.
  • This patent describes a wick for a metal vapor laser. It comprises a refractory metal cylinder, and means operatively associated with the cylinder to constantly renew a surface coating on the inside surface of the cylinder to enhance wicking action and to control the chemical environment to reduce contamination of the surface.
  • Mixed transition metal oxides are made by a partial reduction of stoichiometric mixtures of the required salts based on the proportion of the metal ion in the oxide being prepared and a firing of the partially reduced mixtures at 800/sup 0/C in a carbon monoxide-rich atmosphere. The mixed transition metal oxides are used as catalysts in air oxygen cathode structures in practical battery applications. This invention relates to mixed transition metal oxides, to their method of manufacture, and to the use of the oxides as catalysts in air oxygen cathode structures in practical battery applications. 1 table (auth)