Theory of Free Electron Laser Instability in a Relativistic Annual [i.e. Annular] Electron Beam PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Theory of Free Electron Laser Instability in a Relativistic Annual [i.e. Annular] Electron Beam PDF full book. Access full book title Theory of Free Electron Laser Instability in a Relativistic Annual [i.e. Annular] Electron Beam by Han S. Uhm. Download full books in PDF and EPUB format.
![Theory of Free Electron Laser Instability in a Relativistic Annual [i.e. Annular] Electron Beam PDF](https://books.google.com/books/content/images/frontcover/OmD6tgAACAAJ?fife=w150-h200)
Author: Han S. Uhm
Publisher:
ISBN:
Category : Electron beams
Languages : en
Pages : 94
Get Book Here
Book Description
![Theory of Free Electron Laser Instability in a Relativistic Annual [i.e. Annular] Electron Beam PDF](https://books.google.com/books/content/images/frontcover/OmD6tgAACAAJ?fife=w80-h100)
Author: Han S. Uhm
Publisher:
ISBN:
Category : Electron beams
Languages : en
Pages : 94
Get Book Here
Book Description
Author: Han S. Uhm
Publisher:
ISBN:
Category :
Languages : en
Pages : 50
Get Book Here
Book Description
A self-consistent theory of the free electron laser instability is developed for a hollow electron beam propagating through an undulator (multiple mirror) magnetic field. The stability analysis is carried out within the framework of the linearized Vlasov-Maxwell equations. The dispersion relation describing the free electron laser instability in a hollow relativistic electron beam is obtained for an equilibrium distribution function in which all electrons have same value of transverse energy and the same value of canonical angular momentum, and a Lorentian distribution in axial momentum. It is shown that the influence of finite radial geometry plays a critical role in determining detailed stability behavior. Moreover, the growth rate and bandwidth of the instability can be expressed in terms of Budker's parameter upsilon, instead of the plasma frequency as in the case of a uniform density beam. Furthermore, it is found that free electron laser stability properties exhibit a sensitive dependence on axial momentum spread.
Author: Han S. Uhm
Publisher:
ISBN:
Category :
Languages : en
Pages : 78
Get Book Here
Book Description
The free electron laser instability is investigated for a relativistic annular electron beam propagating through a helical wiggler magnetic field. It is assumed that the beam is thin, with radial thickness (2a) much smaller than the beam radius (RO), and that nu/gamma(b) “1, where nu is Budker's parameter. The stability analysis is carried out within the framework of the linearized Vlasov-Maxwell equations for perturbations with general azimuthal harmonic number l and radial mode number s, including the important influence of (a) finite beam geometry in the radial direction, (b) positioning of the beam radius relative to the outer conducting wall (RO/Rc), and (c) finite wiggler amplitude (deta B). All of these effects are shown to have an important influence on stability behavior. Moreover, the maximum coupling between the transverse and longitudinal modes increases substantially with increasing radial mode number s. It is also found that the transverse magnetic (TM) mode has slightly larger growth rate than the transverse electric (TE) mode. (Author).
Author: W. B. Colson
Publisher:
ISBN:
Category : Compton effect
Languages : en
Pages : 314
Get Book Here
Book Description
Author: Giuseppe Dattoli
Publisher: World Scientific
ISBN: 9814506370
Category : Science
Languages : en
Pages : 666
Get Book Here
Book Description
Contents:Electron Beam OpticsSynchrotron Radiation: A Short DescriptionSynchrotron Radiation: Emission in Undulator MagnetsAccelerators with Radiative DumpingFree Electron Laser: An IntroductionFEL Pendulum EquationUndulator FEL DynamicsFEL Integral EquationMiscellaneous Considerations on the FEL Gain and the High-Gain LimitA Qualitative Description of Storage-Ring FEL Dynamics and Longitudinal Mode Coupling Readership: Laser physicists. keywords:Free Electron Laser;Laser;Linac;Microtron;Storage Ring;Synchrotron Radiation;Undulators;Wigglers;Bending Magnets;Coherent Radiation Sources;Beam Optics;Colson Equation;Electron Beam Transport;FEL Pendulum Equation;Gain Curve;High Gain Regime;Saturation;Small Gain Regime;Transport Channel;Magnetic Undulator
Author: Han S. Uhm
Publisher:
ISBN:
Category :
Languages : en
Pages : 70
Get Book Here
Book Description
The free electron laser instability for a solid relativistic electron beam propagating in combined transverse helical wiggler and uniform axial guide fields is investigated within the framework of the linearized Vlasov-Maxwell equations. Stability properties are investigated for the choice of equalibrium distribution function in which all electrons have the same value of the linear combination of transverse and helical invariants. The instability growth rate is calculated including a determination of the optimum value of the ratio of beam radius to conducting wall radius for maximum growth. It is found that the maximum growth rate for a solid electron beam is comparable to that for a hollow beam with similar parameters. Moreover, the introduction of a small axial momentum spread significantly reduces the instability growth rate.
Author: Ronald C. Davidson
Publisher:
ISBN:
Category : Electron beams
Languages : en
Pages : 38
Get Book Here
Book Description
Author: Ronald C. Davidson
Publisher:
ISBN:
Category :
Languages : en
Pages : 62
Get Book Here
Book Description
Author: Anna M. Dimos
Publisher:
ISBN:
Category :
Languages : en
Pages : 114
Get Book Here
Book Description
Author: Ronald C. Davidson
Publisher:
ISBN:
Category :
Languages : en
Pages : 41
Get Book Here
Book Description
In recent years there have been several theoretical and experimental investigations of the free electron laser which generates coherent electromagnetic radiation using an intense relativistic electron beam as an energy source. With few exceptions, theoretical studies of the free electron laser instability are based on highly simplified models which often neglect beam kinetic effects and coupling to higher harmonics of the fundamental wiggler wavenumber k sub 0, or make use of very idealized approximations in analyzing the matrix dispersion relation. The purpose of the present paper is to develop a fully self-consistent description of the free electron laser instability base d on the Vlasov-Maxwell equations. The final matrix dispersion relation includes all beam kinetic effects and coupling to arbitrary harmonic number (n) of the fundamental wiggler wavenumber k sub 0. Moreover, the final matrix dispersion relation makes no a priori assumption that any off-diagonal elements are negligibly small. The present analysis assumes a relativistic electron beam with uniform cross-section propagating in the z-direction through a helical wiggler field.
