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MODULATED PLASMA ELECTRON BEAMS

Abstract

Techniques have been developed for producing electron beams of two amperes or more, from a plasma within a hollow cathode. Electron beam energies of 20 kilovolts are readily obtained and power densities of the order of 10,000 kilowatts per square inch can be obtained with the aid of auxiliary electromagnetic focusing. An inert gas atmosphere of a few microns pressure is used to initiate and maintain the beam. Beam intensity increases with both gas pressure and cathode potential but may be controlled by varying the potential of an internal electrode. Under constant pressure and cathode potential the beam intensity may be varied over a wide range by adjusting the potential of the internal control electrode. The effects of cathode design on the volt-ampere characteristics of the beam and the design of control electrodes are described. Also, performance data in both helium and argon are given. A tentative theory of the origin of electrons and of beam formation is proposed. Applications to vacuum metallurgy and to electron beam welding are described and illustrated. (auth)
Authors:
Publication Date:
Aug 15, 1963
Product Type:
Conference
Report Number:
CONF-60-3; AED-Conf-63-128-1
Reference Number:
NSA-17-041659
Resource Relation:
Conference: Wescon Institute of Electrical and Electronics Engineers Conference, San Francisco, CA (United States), 20-23 Aug 1963
Subject:
PHYSICS; ARGON; CATHODES; EFFICIENCY; ELECTRIC POTENTIAL; ELECTRODES; ELECTROMAGNETIC FIELDS; ELECTRON BEAMS; ENERGY; ENERGY RANGE; FOCUSING; HELIUM; HOLLOW CATHODES; INERT GASES; INSTRUMENTS; KEV RANGE; LENSES; METALLURGY; PLASMA; PRESSURE; USES; VACUUM; WELDING
OSTI ID:
4877410
Research Organizations:
General Electric Co., Schenectady, NY (United States). Advanved Technology Labs.
Country of Origin:
United States
Language:
English
Submitting Site:
DTIE
Size:
Pages: 8
Announcement Date:
May 18, 2013

Citation Formats

Stauffer, L. H. MODULATED PLASMA ELECTRON BEAMS. United States: N. p., 1963. Web.
Stauffer, L. H. MODULATED PLASMA ELECTRON BEAMS. United States.
Stauffer, L. H. 1963. "MODULATED PLASMA ELECTRON BEAMS." United States.
@misc{etde_4877410,
title = {MODULATED PLASMA ELECTRON BEAMS}
author = {Stauffer, L. H.}
abstractNote = {Techniques have been developed for producing electron beams of two amperes or more, from a plasma within a hollow cathode. Electron beam energies of 20 kilovolts are readily obtained and power densities of the order of 10,000 kilowatts per square inch can be obtained with the aid of auxiliary electromagnetic focusing. An inert gas atmosphere of a few microns pressure is used to initiate and maintain the beam. Beam intensity increases with both gas pressure and cathode potential but may be controlled by varying the potential of an internal electrode. Under constant pressure and cathode potential the beam intensity may be varied over a wide range by adjusting the potential of the internal control electrode. The effects of cathode design on the volt-ampere characteristics of the beam and the design of control electrodes are described. Also, performance data in both helium and argon are given. A tentative theory of the origin of electrons and of beam formation is proposed. Applications to vacuum metallurgy and to electron beam welding are described and illustrated. (auth)}
place = {United States}
year = {1963}
month = {Aug}
}