Relativistic electron beam cyclotron wave growth in helical slow wave structures

Conference · Sat Jan 01 04:00:00 EST 1977

OSTI ID:5357741

Godfrey, B B; Faehl, R J; Newberger, B S; Shanahan, W R; Thode, L E

One of the more promising and thoroughly studied proposals for high energy collective ion acceleration is Autoresonant Acceleration: Ions trapped in the electrostatic wells of large amplitude slow cyclotron waves in an unneutralized intense relativistic electron beam are accelerated by the increase of wave phase velocity as the beam propagates along a magnetic guide field of decreasing strength. A critical component of this scheme is growth of coherent, large amplitude waves. A discussion is given of wave growth by interaction of the beam with a helical slow wave structure. Specific topics include: (1) equilibrium charge and current distributions on the helix; (2) linear wave growth spectra including the effects of radial inhomogeneity; (3) wave growth and saturation; and (4) extraction of cyclotron waves from the amplifier cavity. Movies of two-dimensional computer simulations were made. It was found that waves of amplitude adequate for planned feasibility experiments can indeed be obtained.

• Research Organization: Los Alamos Scientific Lab., N.Mex. (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5357741
• Report Number(s): LA-UR-77-2205; CONF-771035-8
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATORS
BEAM DYNAMICS
BEAM PRODUCTION
BEAMS
COLLECTIVE ACCELERATORS
CONFIGURATION
ELECTRON BEAMS
ENERGY RANGE
FEASIBILITY STUDIES
HELICAL CONFIGURATION
LEPTON BEAMS
PARTICLE BEAMS
RELATIVISTIC RANGE
WAVE PROPAGATION