Free electron laser short pulse simulation and two-mode sideband analysis

by Gregory A. Cord

Publisher: Naval Postgraduate School, Publisher: Available from the National Technical Information Service in Monterey, Calif, Springfield, Va

Written in English
Published: Pages: 56 Downloads: 190
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Edition Notes

Statementby G.A. Cord
ContributionsColson, William B.
The Physical Object
Pagination56 p. ;
Number of Pages56
ID Numbers
Open LibraryOL25487476M

  ETH researchers succeeded in shortening the pulse duration of an X‑ray laser to only 43 attoseconds. With a time resolution in the range of a few quintillionths of a second, they are now able. Free-Electron Lasers. A free-electron laser (FEL) transforms the kinetic energy of a relativistic electron beam, produced by a particle accelerator like a microtron, storage ring, or radio frequency (RF) linac, into electromagnetic (EM) radiation. The transformation occurs when the beam goes through an alternating magnetic field, produced by a magnet called an undulator, that forces the. Short Pulse Laser Interactions with Matter - An Introduction by Paul Gibbon This web page contains supplementary material for the book P. Gibbon: "Short Pulse Laser Interactions with Matter".   High-energy electrons synced to ultrafast laser pulse to probe how vibrational states of atoms change in time Measuring the duration of energetic electron pulses using laser .

Operating a nanosecond-pulsed laser is substantially different from operating a CW laser. To build and produce each pulse, the light has time for very few round trips in the laser cavity, and the simple two-mirror cavity based on a partly transmissive mirror described so far cannot produce these energetic and short pulses. The key to producing. an oscillating electron in a laser pulse of intensity I and wavelength l is given by g5A 11 1 S l mmD 2 I W/cm2. Thus, relativistic effects are expected for the interaction of a super-intense laser pulse and the electrons of a plasma. These effects govern the collective response of electrons and result. structures where the deflection force from the laser is phase-synchronous with the electron beam. This allows for an undulator period that is much greater than the laser wavelength. Due to the possibility of high peak electric fields from ultra-short pulse lasers on dielectric materials, the proposed undulator is. Single sideband frequency noise analysis of the ORION laser module. Comparison of the free-running, stabilized laser and the noise data from the manufacturer's datasheet [ 14 ]. The narrow spikes in the higher frequencies represent spikes from the electronics, including DSP and the technical noise.

CONFERENCE PROCEEDINGS Papers Presentations Journals. Advanced Photonics Journal of Applied Remote Sensing. A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic term "laser" originated as an acronym for "light amplification by stimulated emission of radiation". The first laser was built in by Theodore H. Maiman at Hughes Research Laboratories, based on theoretical work by Charles Hard Townes and Arthur. Combining pulsed a Laser Ablation system with other deposition techniques, SVT Associates' PLD system offers a broad range of materials and applications. The ability to extend the vacuum capabilities to Ultra High Vacuum base pressures allows the control of unwanted film impurities. The first topic yielded a formula for the separatrix height. The second topic utilized data from the proposed LCLS and TESLA x-ray lasers, the Electron Laser Facility at Lawrence Livermore Labs and the Free Electron Laser experiments at the Massachusetts Institute of Technology to develop dimensionless parameters for use in a simple model.

Free electron laser short pulse simulation and two-mode sideband analysis by Gregory A. Cord Download PDF EPUB FB2

Free electron laser short pulse simulation and two-mode sideband analysis 12 personal author(s) gregory a. cord 13a type of report 13b. time covered date of report (year, month, day) page count master's thesis from to june 63 supplementary notationAuthor: Gregory A.

Cord. Free electron laser short pulse simulation and two-mode sideband analysis. The second part of this thesis analyzes sideband behavior when two modes are present in an FEL oscillator. Using two-mode wave and pendulum equations derived from Maxwell's and the Lorentz force equations, the gain and phase shift for each initial phase of the two Author: Gregory A.

Cord. Free-electron-laser short pulse simulation and two-mode sideband analysis. Master's thesis. Simulations of the Stanford FEL describe the trapped-particle instability leading to sideband frequencies and limit-cycle behavior.

Comparisons are made of recent experimental results that show close agreement between the desynchronism curves. A free-electron laser (FEL) is a (fourth generation) synchrotron light source producing extremely brilliant and short pulses of synchrotron radiation.

An FEL functions and behaves in many ways like a laser, but instead of using stimulated emission from atomic or molecular excitations, it employs relativistic electrons as a gain medium.

Synchrotron radiation is generated as a bunch of electrons. The free electron laser (FEL) gain and the power have still been unstable, although the lasing of µs FEL was achieved at the Laboratory for Electron Beam Research and Application (LEBRA).

It has been observed that the FEL gain changes during the pulse duration. SIMULATION AND ANALYSIS OF LASER/ELECTRON BEAM INTERACTION FOR USE AS A FREE ELECTRON LASER J.A. Einstein #, S.G.

Biedron, S.V. Milton,Colorado State University, Fort Collins, COUSA G. Dattoli, ENEA Divisione Fisica Applica ta Centra Rierche Frascati, Roma, Italy Abstract Through the use of simulation tools and theoretical.

The “free” electrons traverse a series of alternating magnets, called a “wiggler,” and radiate light at wavelengths depending on electrons’ energy, wiggler period and magnetic field. light (electromagnetic wave) v┴ B v ║ w y z x wiggler magnets electron trajectory unbunched electron beam pulse bunched electron beam pulse.

The distinct characteristics of short pulse laser interactions with a metal target under conditions of spatial confinement by a solid transparent overlayer are investigated in a series of atomistic simulations.

The simulations are performed with a computational model combining classical molecular dynamics (MD) technique with a continuum description of the laser excitation, electron-phonon. A free-electron laser consists of an electron beam propagating through a periodic magnetic field.

Today such lasers are used for research in. • First operation of a free-electron laser at Stanford University • Today (LCLS Å simulation by S. Reiche) ¾Monochromator can be used to select a single mode, but flux is reduced (by ~) and intensity fluctuates % •Short pulse (20fs) •Stable Intensity from shot to shot •Can be cascaded to short wavelength.

LASER Short pulse SASE-FREE-ELECTRON LASER Wavelength range, nm Emittance, nm rad 2 Pulse length, ps Average brightness Peak brightness Peak power, W Table 1 Some typical characteristics of the undulator radiation from 3rd generation ring based light sources, and FREE.

Free-electron-laser short pulse simulation and two-mode sideband analysis. trapped-particle instability leading to sideband frequencies and limit-cycle behavior. Laser Short Pulse. This book is the definitive tutorial text and reference work on free electron lasers.

Since the publication of the first edition in 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. Free-Electron Laser A) Motivation and Introduction C) Experimental Realization / Challenges can see dynamics if pulse length short wavelengths - 2 simulated image we need a radiation source with SINGLE free electron in uniform motion +.

Nuclear Instruments and Methods in Physics Research A () North-Holland, Amsterdam PULSE COMPRESSION IN A FREE ELECTRON LASER AMPLIFIER F. HARTEMANN *, K. XU and G. BEKEFI Physics Department, Massachusetts Institute of Technology, Cambridge, MAUSA We have studied both theoretically and experimentally a new scheme of active pulse compression m a free electron laser.

based on the free electron model and the experimental value of the thermal conductivity of Ag The irradiation of the target with a 10 ps laser pulse is represented through a source term added to the TTM equa-tion for the electron temperature The source term simu-lates excitation of the conduction band electrons by a laser.

Most of the time-dependent free-electron laser simulation codes that are in use at the present time deal either with an extension of the SVEA in order to solve the wave equation or a particle-in-cell simulation where Maxwell’s equations are solved using a.

in laser beam drilling with short pulses [2]. A commercial finite-element hydrodynamic code FIDAP was used for the simulation of melt formation and dynamics during the im-pact of a short laser pulse [30]. Temperature and pressure fields were obtained using the hydrodynamic software PAR-CIPHAL [31].

Dumitru et al. developed a computer model. a laser based on the solid-state laser material Ruby. Figure Theodore Maiman with the first Ruby Laser in and a cross sectional view of the first device [4]. The first HeNe-Laser, a gas laser followed in It is a gas laser built by Ali Javan at MIT, with a.

The free electron laser uses a beam of relativistic electrons passing through a periodic, transverse magnetic field to produce coherent radiation.

These devices have several advantages. A resonance condition that involves the energy of the electron beam, the strength of the magnetic field, and the. This book has been cited by the following publications.

Sideband instability analysis based on a one-dimensional high-gain free electron laser model. Physical Review Accelerators and Beams, Vol. 20, Issue. 12, Short-wavelength free-electron laser sources and science: a review. Reports on Progress in Physics, Vol.

80, Issue. 11, p. 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.

Introduction to Free-Electron Lasers 2. Basics of Relativistic Dynamics 3. One-dimensional Theory of FEL 4. Optical Architectures oscillations lead to sideband generation. Oscillator FEL’s extraction Optical beam > electron beam Short Rayleigh length Optical beam ~ electron beam At the entrance and exit of the wiggler.

Studying ultrafast processes on the nanoscale with element specificity requires a powerful femtosecond source of tunable extreme-ultraviolet (XUV) or x-ray radiation, such as a free-electron laser (FEL). Current efforts in FEL development are aimed at improving the wavelength tunability and multicolor operation, which will potentially lead to the development of new characterization techniques.

A range of visible, infrared and green diode laser module consisting of laser diode, electrical driver and collimating lens in an black anodized or copper housing. ELECTRON provide customized solutions diode laser modules to fit your requirements.

Fax, E-mail or write to us for more information now. The mechanisms of short pulse laser interactions with a metal target are investigated in simulations performed with a model combining the molecular dynamics method with a continuum description of laser excitation, electron−phonon equilibration, and electron heat conduction.

Three regimes of material response to laser irradiation are identified in simulations performed with a 1 ps laser pulse. We study the interaction of a heteronuclear diatomic molecule, carbon monoxide, with a free-electron laser (FEL) pulse. We compute the ion yields and the intermediate states by which the ion yields are populated.

We do so using rate equations, computing all relevant molecular and atomic photo-ionisation cross-sections and Auger rates. The free electron laser (FEL) is a natural alternative as a radiation source (National Research Council, ). InJ.M.J. Madey invented and developed the FEL, a relativistic electron tube that made use of the open optical resonator.

Principles of Free Electron Lasers H. Freund, T. Antonsen, Jr. 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.

The resulting pulse duration and shape in this sliced mode depends (on pulse front) on the SP laser shape and intensity and (on pulse tail) additionally on relaxation rate of induced electron–hole pairs in the silicon wafer. Typical spectral linewidths of the pump emission were within %–% rms of the central wavelength.

Within this work, the numerical solution of the photon transport equation for pulse amplification is presented. Several discretization schemes are introduced that enable the calculation of the coupling between the transport equation and population inversion.

It is demonstrated that the presented discretization schemes are convergent with respect to the analytic Frantz–Nodvik solution.We have investigated the possibility of a new type of laser by computer simulation using a 1–2/2 dimensional fully relativistic electromagnetic particle code.

By passing a relativistic electron beam over a rippled static magnetic field, high frequency electromagnetic radiation is generated.e-PLAS ANALYSIS OF SHORT PULSE LASER- MATTER INTERACTION EXPERIMENTS ∗ R.

J. Masonξ,1, M. Wei and F. Beg2, R. B. Stephens3 and C. M. Snell4 1Research Applications Corporation, Los Alamos, NM2University of California, San Diego, CA3General Atomics, San Diego, CA4Los Alamos National Laboratory, Los Alamos, NM ∗ Work supported in part by the .