The effect of plasma particles on the free-electron laser freewheeling with spiral wiggler in the presence of a magnetic field

Maryam Bordbar¹

1) Master s Degree in Physics, Islamic Azad University, Science and Research Branch, Tehran, Iran

IOI Code : XADA-CACGG
Publication : The 6th International conference of Sciences and Engineering(6icesconf.com)
Abstract :
    Abstract: Generally, a free electron laser is a kind of laser whose mechanism is unlike conventional quantum lasers. The active medium of this laser is a relativistic electron beam. In this study, a kind of free electron laser has been selected to investigate the effect of plasma particles on the unstable free-electron laser with spiral wiggler in the presence of a spiral wiggler. This includes spiral wiggler and thermal plasma. In order to increase the growth rate of such a laser, instead of using a single beam, two beams are used at close-up speeds. The two-stream instability caused by these two beams increases the growth rate, and the axial magnetic field is also used to prevent beam divergence so that the growth rate increases. Then numerical computations are processed, in which the axial velocity of the beam is divided into two groups. The radiation wave frequency is such that it gives the highest growth rates. This frequency varies for each value of the beam velocity and cyclotron frequency. An increase is also apparent in charts that have been compared to the maximum growth rate of two beams. Three-dimensional and two-dimensional graphs of the maximum growth tract are plotted in terms of the frequency of the plasma and the difference in velocity of the two beams and the frequency of the cyclotron. Keywords: Health Effect, Plasma Particles, Instability, Free Electron Laser, Spiral Weigler, Magnetic Field

Keywords : health effect plasma particles instability free electron laser spiral weigler magnetic field