Accession Number : ADD010055
Title : EBS Amplifier with Cold Cathode.
Descriptive Note : Patent Application,
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC
Personal Author(s) : Smith,Bernard ; DuBuske,Stanley
Report Date : 27 Jan 1983
Pagination or Media Count : 11
Abstract : The cold cathode EBS device is fabricated through solution of several problem factors which have plagued fabrication and application of such devices until now. Judicious choice of materials to be employed within the vacuum tube and careful preprocessing of all materials before assembly have significantly minimized the effect of the above mentioned undesirable factors. Considered most important in this regard is identification of getters for use within the vacuum envelope, which getters will not degass in a rarefied vacuum as is common, thereby fouling the environment and especially the cathode emitter. Next in importance is a careful choice of materials which by their nature are least likely to degass in vacuum, yet which meet the other important standards in regard to performance under heat, expansion rates, degree of fragility and costs for instance. A further important step of the fabrication technique to be described in detail below is the chemical cleaning and prefiring of most of the materials before assembly to remove volatile surface matter. These techniques further take into account selection of proper materials in regard to matters of heat expansion, propensity to degass or poison, and best emission qualities, among other matters considered.
Descriptors : *Patent applications, *Cold cathode tubes, *Oxide cathodes, *Cathodes(Electron tubes), Uranium compounds, Semiconductors, Electron tubes, Electron beams, Chemical cleaning, Tube grids, Preprocessing, Vacuum apparatus, Getters, Expansion, Emitters, Fragility, Poisons, Identification, Rates, Materials, Fouling, Fabrication, Heat, Rarefaction, Structures, Cathodes, Vacuum, Poisoning
Subject Categories : Electrical and Electronic Equipment
Solid State Physics
Distribution Statement : APPROVED FOR PUBLIC RELEASE