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Taghi Mohsenpour

Taghi Mohsenpour

Academic rank: Associate Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Science
Address: Department of Physics, Faculty of Basic Sciences,University of Mazandaran , Babolsar, Iran
Phone: 01135302480

Research

Title
Instability of wave modes in a two-stream free-electron laser with a helical wiggler and an axial magnetic field
Type
JournalPaper
Keywords
Instability; wave modes; two-stream; free-electron laser; helical wiggler; axial magnetic field
Year
2013
Journal Physics of Plasmas
DOI
Researchers Taghi Mohsenpour ، Narges Mehrabi

Abstract

The dispersion relation of a two-stream free-electron laser (TSFEL) with a one-dimensional helical wiggler and an axial magnetic field is studied. Also, all relativistic effects on the space-charge wave and radiation are considered. This dispersion relation is solved numerically to find the unstable interaction among the all wave modes. Numerical calculations show that the growth rate is considerably enhanced in comparison with single-stream FEL. The effect of the velocity difference of the two electron beams on the two-stream instability and the FEL resonance is investigated. The maximum growth rate of FEL resonance is investigated numerically as a function of the axial magnetic field.