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

Volume

21

Issue

1

fYear

1993

fDate

2/1/1993 12:00:00 AM

Firstpage

181

Lastpage

186

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-kV_z-w_c=nk ₀V_Z 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;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.221119

Filename

221119