Title :
Analysis and nonlinear simulation of a quadrupole wiggler FEL at millimeter wavelengths
Author :
Chang, Sheng-Fuh ; Eldridge, Owen C. ; Scharer, John E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
fDate :
11/1/1988 12:00:00 AM
Abstract :
The use of a helical quadrupole wiggler field in a circular guide for amplification of millimeter waves is discussed. The effects of space charge and axial field are considered for beam stability for near-axis orbits. When space charge is neglected, the orbit equations and properties and characteristic betatron oscillation of frequencies are examined by a linearization of the orbit equations. A nonlinear simulation code for dipole wigglers is modified to examine optimum gain TE21 waveguide modes for a quadrupole wiggler in the 30-300 GHz range
Keywords :
free electron lasers; laser theory; masers; space charge; 30 to 300 GHz; axial field; beam stability; betatron oscillation; circular guide; dipole wigglers; helical quadrupole wiggler field; millimeter wave amplification; millimeter waves; near-axis orbits; nonlinear simulation code; optimum gain TE21 waveguide modes; orbit equations; particle orbit trajectories; quadrupole wiggler; space charge; Analytical models; Equations; Frequency; Millimeter wave measurements; Millimeter wave radar; Orbits; Particle beams; Space charge; Stability; Undulators;
Journal_Title :
Quantum Electronics, IEEE Journal of
