Comparison of Growth Rate of Electromagnetic Waves in Pre-bunched Cerenkov Free Electron Laser and Free Electron Laser

Bhasin, Anuradha; Bhatia, Bhupesh
August 2012
International Journal of Computer Applications;8/15/2012, Vol. 52, p1
Academic Journal
An electron beam passing through a slow wave structure is unstable to an electromagnetic perturbation whose phase velocity equals the velocity of the beam. This phenomenon of cerenkov emission is the basis of all slow wave devices. The increase in the growth rate by using a pre-bunched electron beam in a Cerenkov free electron laser (CFEL) and Free electron laser (FEL) has been studied. We have compared the increase in growth rate with the increase in modulation index calculated at experimentally known CFEL and FEL parameters.


Related Articles

  • Electron trajectories and gain in a free-electron laser with realizable helical wiggler and ion-channel guiding. Esmaeilzadeh, Madhi; Ebrahimi, Sadollah; Saiahian, Alaeddin; Willett, Joseph E.; Willett, Lori Jo // Physics of Plasmas;Sep2005, Vol. 12 Issue 9, p093103 

    A theory is developed for a free-electron laser (FEL) with a three-dimensional helical wiggler and ion-channel guiding. The relativistic equation of motion for a single electron in the combined wiggler and ion-channel fields is solved in the rotating wiggler frame. With the aid of the...

  • Analysis of self-amplified spontaneous emission free-electron laser using Lienard-Wiechert fields. Kia, M. R.; Maraghechi, B. // Physics of Plasmas;Apr2012, Vol. 19 Issue 4, p043101 

    Dynamical equations of electrons in an electron beam with finite length under the influence of a planar wiggler magnetic field and the Lienard-Wiechert fields of other electrons are derived and solved numerically. The analysis is applicable to self-amplified spontaneous emission free-electron...

  • A whistler-pumped free electron laser. Sharma, Anamika; Tripathi, V. K. // Physics of Fluids (00319171);Nov88, Vol. 31 Issue 11, p3375 

    A relativistic electron beam in the presence of a whistler wave excites a negative-energy beam space charge mode and a high frequency laser radiation (ω[sub 1] ... ω[sub c] ). The instability is explosive for a copropagating beam and the whistler pump, resulting in the excitation of an...

  • Gain enhancement in a free electron laser by two-stream instability. Botton, Mordechai; Ron, Amiram // Journal of Applied Physics;5/15/1990, Vol. 67 Issue 10, p6583 

    Presents a study which measured the gain of an electromagnetic wave in free electron lasers (FEL). Classification of FEL; Details of the procedure used in the calculation of the gain; Analysis of the similar characteristic of an electron beam and FEL.

  • Electron beam transport in gas-loaded free-electron lasers. Yariv, Shalom; Friedland, Lazar // Physics of Fluids B: Plasma Physics;Dec90, Vol. 2 Issue 12, p3114 

    The effects of the presence of helical wiggler and axial guide magnetic fields on the quality of the electron beam in a gas-loaded free-electron laser are investigated. The electron velocity space diffusion theory in the free-electron laser is developed and tested in Monte Carlo simulations. The...

  • The controlling parameter of a wiggler-pumped free-electron laser with an axial-guide magnetic... San-kui Gou // Physics of Plasmas;Feb95, Vol. 2 Issue 2, p533 

    Focuses on basic equations of a wiggler-pumped free-electron laser with an axial-guide magnetic field. Evolution of the configuration; Critical value of the controlling parameter which contains the effects of the wiggler, the electron beam, and the guide field; Evolution property of the...

  • Finite magneto-static field effect on the excitation of THz hybrid modes in an elliptical metallic plasma waveguide with two energy sources. Safari, S.; Jazi, B. // Physics of Plasmas;2017, Vol. 24 Issue 5, p1 

    The effect of finite magnetic field on the excitation, generation, and amplification of slow electromagnetic waves at THz frequency in a magnetized plasma waveguide with elliptical cross section is investigated. In configuration mentioned above, there are two electron beams with opposite...

  • Free-electron laser operation in a sheath helix configuration.. Sharma, Anamika; Chauhan, Ansuya; Tripathi, V.K. // Physics of Plasmas;Jun94, Vol. 1 Issue 6, p2053 

    Reports on a sheath helix loaded waveguide that supports a slow electromagnetic wave which can act as a wiggler for a millimeter-wave free-electron laser (FEL). Sensitivity of the radiation frequency and growth rate as functions of the phase velocity of the pump wave; Tuning of the FEL...

  • Efficiency enhancement in free-electron laser amplifier with one dimensional helical wiggler and ion-channel guiding. Jafari Bahman, F.; Maraghechi, B. // Physics of Plasmas;Jan2012, Vol. 19 Issue 1, p013107 

    A method for efficiency enhancement in free-electron laser is studied which uses both tapered wiggler magnetic field and ion-channel density. Derivation of a set of nonlinear and coupled differential equations leads to the self-consistent description of the evolution of both an ensemble of...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics