Title :
Nonlinear simulation of a high-power collective free-electron laser
Author :
Freund, H.P. ; Ganguly, A.K.
Author_Institution :
Naval Res. Lab., Washington, DC, USA
Abstract :
A comparison is described between the 3-D simulation code ARACHNE and a recent 33.4 GHz collective PEL amplifier experiment at MIT. The experiment demonstrated power levels of 61 MW (= 27% efficiency) without recourse to tapered magnetic fields using a 750 keV/300 A electron beam with an axial energy spread of 1.5% propagating through a cylindrical drift tube in the presence of a helical wiggler [Bw ≤ 1.8 kG, λw = 3.18 cm] and a guide magnetic field [B0 ≤ 12 kG]. The maximum power was observed when the wiggler and guide fields were antiparallel. ARACHNE is in substantial agreement with the experiment and shows peak power levels of 60 MW.
Keywords :
Current measurement; Electron beams; Equations; Magnetic field measurement; Magnetic fields; Mathematical model; Undulators;
Conference_Titel :
High-Power Particle Beams, 1992 9th International Conference on
Print_ISBN :
000-0-0000-0000-0
