Slow-wave propagation of an intense relativistic electron beam

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5824438

Providakes, G F

The slow space charge wave on an intense relativistic electron beam is a candidate for the trapping and transporting and acceleration of low-energy, high-density, ion beams. To demonstrate a slow space charge wave ion accelerator, the slow space charge wave must have wave amplitude, frequency, and phase velocity precisely controlled. The experimental research reported in this thesis studied these critical wave parameters. Experimental apparatus was built to transport an intense relativistic electron beam through iris coupled dielectric loaded cavities for wave growth. The electron beam was then transported through a quartz tube for dielectric loading of the wave. The research developed and demonstrated techniques to measure the beam and wave time evolution on a single shot of the 80 nanosecond intense relativistic electron beam. The phase velocity's dependence on dielectric boundaries, space charge limiting current, and wave amplitude were observed. The phase velocities observed with large amplitude waves were much lower than could be accounted for by linear theory. When the wave amplitude was largest, the beam current was near the space charge limit, and the phase velocity was minimum, 0.06c; the second harmonic of the slow space charge wave was observed. The second harmonic of the wave indicated that the wave is no longer in the linear region. This observation was consistent with nonlinear theory.

• Research Organization: Cornell Univ., Ithaca, NY (USA)
• OSTI ID: 5824438
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700208 -- Fusion Power Plant Technology-- Inertial Confinement Technology
ACCELERATION
BEAM TRANSPORT
BEAMS
ELECTRON BEAMS
ENERGY RANGE
ION BEAMS
LEPTON BEAMS
PARTICLE BEAMS
PHASE VELOCITY
RELATIVISTIC RANGE
SPACE CHARGE
VELOCITY
WAVE PROPAGATION