Pulse Propagation in Free-electron Lasers with a Tapered Undulator PDF Download
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Author:
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Languages : en
Pages :
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Book Description
The one-dimensional theory of short pulse propagation in free electron lasers is extended to tapered undulator devices and is used to study the behavior of an oscillator with parameter values close to those expected in forthcoming experiments. It is found that stable laser output is possible only over a small range of optical cavity lengths. Optical pulse characteristics are presented and are found to change considerably over this range.
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Category :
Languages : en
Pages :
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Book Description
The one-dimensional theory of short pulse propagation in free electron lasers is extended to tapered undulator devices and is used to study the behavior of an oscillator with parameter values close to those expected in forthcoming experiments. It is found that stable laser output is possible only over a small range of optical cavity lengths. Optical pulse characteristics are presented and are found to change considerably over this range.
Author: W. B. Colson
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
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Book Description
Pulse propagation in several free electron laser designs is examined along with mode instabilities, oscillator evolution, spontaneous emission, transverse wavefront propagation, and Coulomb forces. The designs explored include the simple undulator, the tapered undulator, the optical klystron, and the transverse gradient gain-expansion magnet. (Author).
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Category :
Languages : en
Pages :
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Book Description
The one-dimensional theory of short pulse propagation in free electron lasers is extended to tapered wiggler devices and is used to study the behavior of an oscillator with parameter values close to those expected in forthcoming experiments. It is found that stable laser output is possible only over a small range of optical cavity lengths. Optical pulse characteristcs are presented and are found to change considerably over this range.
Author: Henry P. Freund
Publisher: Springer Nature
ISBN: 3031409450
Category : Technology & Engineering
Languages : en
Pages : 747
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Book Description
This book presents a comprehensive description of the physics of free-electron lasers starting from the fundamentals and proceeding through detailed derivations of the equations describing electron trajectories, and spontaneous and stimulated emission. Linear and nonlinear analyses are described, as are detailed explanations of the nonlinear simulation of a variety of configurations including amplifiers, oscillators, self-amplified spontaneous emission, high-gain harmonic generation, and optical klystrons. Theory and simulation are anchored using comprehensive comparisons with a wide variety of experiments.
Author: Giuseppe Dattoli
Publisher: World Scientific
ISBN: 9814506370
Category : Science
Languages : en
Pages : 666
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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: P. Luchini
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 346
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Book Description
This book is a reference text for all those working in free-electron laser research as well as being a learning aid for physicists and graduate students who wish an introduction to this field. Only a basic understanding of relativistic mechanics and electromagnetism is presupposed. After an overview of early developments and general principles of operation, the different models that can be used to describe free-electron lasers are presented, organized according to their range of applicability. The relevent conceptual and mathematical constructs are built up from first principles with attention to obtaining the practically important results in a simple but rigorous way. Interaction of the undulator with the driving electron accelerator and the laser cavity and design of undulator magnets are treated and an overview is given of some typical experiments.
Author: CLAUDIO EMMA
Publisher:
ISBN:
Category :
Languages : en
Pages : 193
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Book Description
The advent of the X-ray Free Electron Laser (XFEL) as the world's brightest light source has opened the door to the study of natural phenomena occurring on Angstrom level spatial scales and femtosecond time intervals. After more than five years of successful operation, there is a demand from the scientific community to further increase the brightness and peak power one hundred times more than the state-of-the art to reach TW power X-ray pulses in the next generation of XFELs. The central subject of this dissertation is the study of strategies to achieve high efficiency, high power XFEL pulses via optimized undulator tapering and the novel technique of fresh bunch self-seeding which we demonstrate experimentally in this work. Our work begins with theoretical and numerical investigations of high efficiency XFELs in which we determine the primary factors which prevent the efficiency from reaching values on the order of 10 %, which correspond to TW-power pulses. The initial studies focus on the dependence of the peak power of a TW-level self-seeded tapered XFEL on the transverse electron distribution. We show via numerical simulations that more uniform transverse distributions (parabolic or flat) can increase the efficiency compared to transversely Gaussian beams from 2.8 % to 4.8 %, corresponding to an increase in peak power from 1.6 TW to 2.6 TW in a 200 m undulator. These numerical studies emphasize the contribution of two physical phenomena, diffraction and the synchrotron sideband instability, as the primary obstacles to reaching TW peak power in a compact undulator system. To circumvent these issues we propose two improvements for high extraction efficiency tapered XFELs: a new development in FEL hardware through the proposal of an Advanced Gradient Undulator (AGU), and a new technique for the efficient generation of high power XFEL radiation which we name fresh bunch self-seeding. We analyze in detail the performance of a high efficiency AGU by carrying out the first dedicated comparative numerical optimization study of a tapered FEL including and intentionally disabling time dependent effects. Combining the AGU design with an optimized undulator taper and a fresh bunch self-seeded system yields a peak efficiency in simulation of 12 % with 6.3 TW of peak power in a 100 m undulator. Following the numerical and theoretical studies of tapered XFELs, the remainder of the work describes the first experimental demonstration of fresh bunch self seeding in an XFEL. With this scheme we are able to generate high power (50 GW) narrow bandwidth ($\delta \omega/\omega_0=8\times 10^{-5}$) short X-ray pulses ($\delta t
Author:
Publisher:
ISBN:
Category : Lasers
Languages : en
Pages : 936
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Book Description
Author: H.P. Freund
Publisher: Springer Science & Business Media
ISBN: 9780412725401
Category : Technology & Engineering
Languages : en
Pages : 586
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Book Description
This book is the definitive tutorial text and reference work on free electron lasers. Since the publication of the first edition in 1992 there has been a significant increase both in the number of free-electron lasers in use worldwide, and in the understanding of the various regimes for these devices. In order to maintain the position of this book as the most comprehensive and thorough reference and tutorial in the field, the authors have completely updated the book. In addition to updates and corrections to chapters in the first edition, new chapters have been added.
Author: R. Bonifacio
Publisher: Elsevier
ISBN: 0444598723
Category : Science
Languages : en
Pages : 326
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Book Description
During the past few years the physics and technology of charged particle beams on which electron-positron linear colliders in the TeV region, storage rings from synchrotron radiation sources and Free Electron Lasers are based, has seen a remarkable development. The purpose of this series of schools is to address the physics and technology issues of this field, train young people and at the same time provide a forum for discussions on recent advances for scientists active in this field. The subjects chosen for this first course reflect the recent interest in TeV electron positron colliders, the possibility offered by Free Electron Lasers to power them and the developments in the production of high brightness electron beams.
