Formation and transport of sheet electron beams and multi-beam configurations for high-power microwave devices

Conference · Wed Nov 01 04:00:00 EST 1995

OSTI ID:116400

Basten, M A; Booske, J H; Anderson, J; Scharer, J E ^[1]

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1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Electrical and Computer Engineering

Sheet electron beams and configurations with multiple electron beams have the potential to make possible higher power sources of microwave radiation due to their ability to transport high currents, at reduced current densities, through a single RF interaction circuit. Possible microwave device applications using sheet electron beams include sheet-beam klystrons, rectangular grating circuits, and planar FELS. Historically, implementation of sheet beams in microwave devices has been discouraged by their susceptibility to the diocotron instability in solenoidal focusing systems. However, recent theoretical and numerical studies have shown that stable transport of sheet beams is possible, in periodically cusped magnetic (PCM) fields. The use of an offset-pole PCM configuration has been shown analytically to provide side-fields for 2-D focusing of the beam, and this has been recently verified with PIC code simulations. The authors will present further theoretical studies of sheet and multi-beam transport and discuss results from an experimental investigation of the formation, stability and transport of PCM-focused sheet electron beams. This includes a laboratory method of forming an elliptical sheet beam using a magnetic quadrupole pair and a round-beam Pierce gun.

• OSTI ID: 116400
• Report Number(s): CONF-950793--; ISBN 0-8194-1916-8
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BEAM CURRENTS
BEAM DYNAMICS
BEAM PRODUCTION
BEAM TRANSPORT
COMPUTERIZED SIMULATION
ELECTRON BEAMS
ELECTRON GUNS
FOCUSING
FREE ELECTRON LASERS
MICROWAVE EQUIPMENT
STABILITY