Effects of Perturbing B-Field Orientation on Magnetic Priming of a Relativistic Magnetron
Abstract
Experiments have been performed testing magnetic-priming at the cathode of a relativistic magnetron to study the effects on high-power microwave performance. Magnetic perturbations were imposed utilizing three, high-permeability nickel-iron wires embedded beneath the emission region of a 1.27 cm diameter cathode, spaced 120 degrees apart (for N/2 symmetry in an N cavity magnetron). These three, high permeability wires perturb both the axial and radial magnetic fields near the emission region of the cathode. Magnetic priming was demonstrated at UM to increase the percentage of pi-mode shots by 15% over the baseline case in the relativistic magnetron. Improvements in microwave power, pulse width, and start-oscillation time were also observed. Earlier experimental research by Neculaes and recent simulation work suggest that using permanent magnets with radially directed remanence fields centered under the cathode emission region instead of high permeability wires can yield improved magnetron performance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 2008
- Accession Number
- ADA493444
Entities
People
- Brad W. Hoff
- David L. Price
- David M. French
- Edward Cruz
- Jacob C. Zier
- Matthew R. Gomez
- Nick M. Jordan
- Ronald M. Gilgenbach
- Thomas A. Spencer
- Y. Y. Lau
Organizations
- University of Michigan