NDLI: Investigation of space-charge flow in magnetron injection guns

Content Provider	IEEE Xplore Digital Library
Author	Masnari, N.A.
Copyright Year	1966
Description	Author affiliation: The University of Michigan, Ann Arbor, Mich. (Masnari, N.A.)
Abstract	A combined theoretical and experimental study has been carried out on the space-charge flow in a magnetron injection gun (MIG). The theoretical analysis considers both nonrelativistic and relativistic cases and is concerned with the beam current density, perveance, axial- and rotational-kinetic energy of the electrons and relates these quantities to conditions at the cathode. An understanding of hollow beam space-charge flow has been obtained from the experimental investigation of a MIG which has been designed for maximum operating flexibility. The accelerating anode consists of six separate discs which may be biased independently thus providing a means for varying the potential distribution in the gun and suppressing or enhancing emission from any portion of the cathode. Three separate conical cathodes have been investigated with half-angles of 4, 8 and 12 degrees. The guns have been tested in an electron beam analyzer in which the beam is intercepted by a movable collector-aperture system. By varying the emission from the cathode, it has been observed that the flow is quasi-laminar. High magnetic fields were observed to alter the current density distribution but did not appreciably affect the thickness of the beam. Evaluation of the results provides a better understanding of the space-charge flow and is helpful in leading to the design of an optimum MIG configuration.
Starting Page	44
Ending Page	44
File Size	115217
Page Count	1
File Format	PDF
DOI	10.1109/IEDM.1966.187666
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1966-10-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cathodes Magnetic separation Magnetic analysis Current density Electron beams Acceleration Anodes Electron guns System testing Magnetic fields
Content Type	Text
Resource Type	Article

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