Title :
A slow wave free-electron laser in a longitudinal wiggler field
Author :
Mishra, Ganeswar ; Maheshwari, K.P. ; Praburam, G.
Author_Institution :
Sch. of Phys., Devi Ahilya Univ., Indore, India
fDate :
2/1/1993 12:00:00 AM
Abstract :
Linearized Vlasov-Maxwell equations are solved to obtain the growth rate of free electron laser instability from a tenuous relativistic electron beam propagating in a partially dielectric loaded waveguide immersed in combined axial and longitudinal wiggler magnetic fields. The instability appears via cyclotron resonance interactions for wave perturbations very close to w-kVz-wc=nk 0VZ where n is the general harmonic number. For n=0, the gain is similar to a slow wave cyclotron amplifier. For n⩾1, the growth rate is substantially larger than the standard slow wave free electron laser scheme utilizing a transverse wiggler field
Keywords :
Maxwell equations; Vlasov equation; dielectric waveguides; electron beams; free electron lasers; magnetic fields; stability; wigglers; cyclotron resonance interactions; free electron laser instability; gain; growth rate; linearised Vlasov-Maxwell equations; longitudinal wiggler field; partially dielectric loaded waveguide; propagating relativistic electron beam; slow wave free-electron laser; wave perturbations; wiggler magnetic fields; Cyclotrons; Dielectrics; Electron beams; Equations; Free electron lasers; Loaded waveguides; Optical propagation; Undulators; Waveguide components; Waveguide lasers;
Journal_Title :
Plasma Science, IEEE Transactions on
