Plasma effects in a free electron laser

Author

Tripathi, Vipin K. ; Liu, Chuan Sheng

Author_Institution

Dept. of Phys., Indian Inst. of Technol., New Delhi, India

Volume

18

Issue

3

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

466

Lastpage

471

Abstract

The introduction of a plasma and a strong guide magnetic field in a free electron laser (FEL) slows down the phase velocity of radiation, significantly reducing the requirements on beam energy for generating frequencies below the electron-cyclotron frequency (ω₁≲ω_c). Around plasma resonance (ω₁~ω_p), the FEL mode couples to two-stream instability (TSI), attaining a large growth rate, comparable to that of the wiggler-free TSI. At plasma densities comparable to beam density, the beam-induced local depression in the electron density of the plasma acts as a waveguide for guiding any high-frequency radiation when the beam current is ≳17 kA

Keywords

free electron lasers; magnetic field effects; masers; microwave generation; plasma applications; 17 kA; beam-induced local depression; electron density; electron-cyclotron frequency; free electron laser; high-frequency radiation; microwave generation; phase velocity; plasma resonance; two-stream instability; Electron beams; Free electron lasers; Frequency; Laser beams; Magnetic fields; Magnetic resonance; Particle beams; Plasma density; Plasma waves; Undulators;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.55916

Filename

55916