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Measurements Of Coherent Synchrotron Radiation And Its Impact On The Lcls Electron Beam
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Book Synopsis Measurements of Coherent Synchrotron Radiation and Its Impact on the LCLS Electron Beam by :
Download or read book Measurements of Coherent Synchrotron Radiation and Its Impact on the LCLS Electron Beam written by and published by . This book was released on 2008 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to reach the high peak current required for an x-ray FEL, two separate magnetic dipole chicanes are used in the LCLS accelerator to compress the electron bunch length in stages. In these bunch compressors, coherent synchrotron radiation (CSR) can be emitted-induced either by a short electron bunch, or by any longitudinal density modulation that may be on the bunch. We present measurements, simulations, and analysis of (1) the CSR-induced energy loss, (2) the related transverse emittance growth, and (3) the microbunching-induced CSR directly observed at optical wavelengths.
Book Synopsis Measurements and Modeling of Coherent Synchrotron Radiation and Its Impact on the LCLS Electron Beam by :
Download or read book Measurements and Modeling of Coherent Synchrotron Radiation and Its Impact on the LCLS Electron Beam written by and published by . This book was released on 2008 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to reach the high peak current required for an x-ray free electron laser, two separate magnetic dipole chicanes are used in the Linac Coherent Light Source (LCLS) accelerator to compress the electron bunch length in stages. In these bunch compressors, coherent synchrotron radiation (CSR) can be emitted either by a short electron bunch or by any longitudinal density modulation that may be on the bunch. In this paper, we report detailed measurements of the CSR-induced energy loss and transverse emittance growth in these compressors. Good agreement is found between the experimental results and multi-particle tracking studies. We also describe direct observations of CSR at optical wavelengths and compare with analytical models based on beam microbunching.
Book Synopsis Measurement and Simulation of the Impact of Coherent Synchrotron Radiation on the Jefferson Laboratory Energy Recovery Linac Electron Beam by :
Download or read book Measurement and Simulation of the Impact of Coherent Synchrotron Radiation on the Jefferson Laboratory Energy Recovery Linac Electron Beam written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In an experiment conducted on the Jefferson Laboratory IR free-electron laser driver, the effects of coherent synchrotron radiation (CSR) on beam quality were studied. The primary goal of this work was to explore CSR output and effect on the beam with variation of the bunch compression in the IR recirculator. Here we examine the impact of CSR on the average energy loss as a function of bunch compression as well as the impact of CSR on the energy spectrum of the bunch. Simulation of beam dynamics in the machine, including the one-dimensional CSR model, shows very good agreement with the measured effect of CSR on the average energy loss as a function of compression. Finally, a well-defined structure is observed in the energy spectrum with a feature in the spectrum that varies as a function of the compression. This effect is examined in simulations, as well, and a simple explanation for the variation is proposed.
Book Synopsis Synchrotron Light Sources and Free-Electron Lasers by : Eberhard J. Jaeschke
Download or read book Synchrotron Light Sources and Free-Electron Lasers written by Eberhard J. Jaeschke and published by Springer. This book was released on 2016-05-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hardly any other discovery of the nineteenth century did have such an impact on science and technology as Wilhelm Conrad Röntgen’s seminal find of the X-rays. X-ray tubes soon made their way as excellent instruments for numerous applications in medicine, biology, materials science and testing, chemistry and public security. Developing new radiation sources with higher brilliance and much extended spectral range resulted in stunning developments like the electron synchrotron and electron storage ring and the freeelectron laser. This handbook highlights these developments in fifty chapters. The reader is given not only an inside view of exciting science areas but also of design concepts for the most advanced light sources. The theory of synchrotron radiation and of the freeelectron laser, design examples and the technology basis are presented. The handbook presents advanced concepts like seeding and harmonic generation, the booming field of Terahertz radiation sources and upcoming brilliant light sources driven by laser-plasma accelerators. The applications of the most advanced light sources and the advent of nanobeams and fully coherent x-rays allow experiments from which scientists in the past could not even dream. Examples are the diffraction with nanometer resolution, imaging with a full 3D reconstruction of the object from a diffraction pattern, measuring the disorder in liquids with high spatial and temporal resolution. The 20th century was dedicated to the development and improvement of synchrotron light sources with an ever ongoing increase of brilliance. With ultrahigh brilliance sources, the 21st century will be the century of x-ray lasers and their applications. Thus, we are already close to the dream of condensed matter and biophysics: imaging single (macro)molecules and measuring their dynamics on the femtosecond timescale to produce movies with atomic resolution.
Book Synopsis Coherent Synchrotron Radiation Experiments for the LCLS. by :
Download or read book Coherent Synchrotron Radiation Experiments for the LCLS. written by and published by . This book was released on 1998 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors describe a coherent synchrotron radiation experiment planned at Los Alamos to support the design of the Linac Coherent Light Source (LCLS) x-ray FEL. Preliminary simulations of the LCLS compressors show that a clever tuning strategy can be used to minimize the electron's beam emittance growth due to noninertial space-charge forces by employing a delicate cancellation of these forces. The purpose of the Los Alamos experiment, using a sub-picosecond chicane compressor, is to benchmark these simulations tools. In this paper, the authors present detailed numerical simulations of the experiment, and point out unique signatures of this effect that are measurable. As predicted previously, the largest emittance growths and induced energy spreads result from the nonradiative components of this space-charge force.
Book Synopsis Synchrotron Radiation by : D. Phil Woodruff
Download or read book Synchrotron Radiation written by D. Phil Woodruff and published by Cambridge University Press. This book was released on 2021-10-07 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn about the properties of synchrotron radiation and its wide range of applications in physics, materials science and chemistry with this invaluable reference. This thorough text describes the physical principles of the subject, its source and methods of delivery to the sample, as well as the different techniques that use synchrotron radiation to analyse the electronic properties and structure of crystalline and non-crystalline materials and surfaces. Explains applications to study the structure and electronic properties of materials on a microscopic, nanoscopic and atomic scale. An excellent resource for current and future users of these facilities, showing how the available techniques can complement information obtained in users' home laboratories. Perfect for graduate and senior undergraduate students taking specialist courses in synchrotron radiation, in addition to new and established researchers in the field.
Book Synopsis Synchrotron Radiation and Free-Electron Lasers by : Kwang-Je Kim
Download or read book Synchrotron Radiation and Free-Electron Lasers written by Kwang-Je Kim and published by Cambridge University Press. This book was released on 2017-03-23 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary concepts -- Synchrotron radiation -- Basic FEL physics -- 1D FEL analysis -- 3D FEL analysis -- Harmonic generation in high-gain FELs -- FEL oscillators and coherent hard X-rays -- Practical considerations and experimental results for high-gain FELs
Book Synopsis Coherent Synchrotron Radiation as a Diagnostic Tool for the LCLS Longitudinal Feedback System by : Z. Huang
Download or read book Coherent Synchrotron Radiation as a Diagnostic Tool for the LCLS Longitudinal Feedback System written by Z. Huang and published by . This book was released on 2005 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Linac Coherent Light Source (LCLS) will be the world's first x-ray free-electron laser (FEL). To ensure the vitality of FEL lasing, a longitudinal feedback system is required together with other diagnostics. In this paper, we study the possibility of using Coherent Synchrotron Radiation (CSR) from the chicane as a diagnostic tool for bunch length feedback. Studies show that CSR is a good candidate, even for a non-Gaussian, double-horn longitudinal charge distribution as in the LCLS. We further check the possibility for detecting possible microbunching.
Book Synopsis Recent Experiments on the Effect of Coherent Synchrotron Radiation on the Electron Beam of CTF II. by :
Download or read book Recent Experiments on the Effect of Coherent Synchrotron Radiation on the Electron Beam of CTF II. written by and published by . This book was released on 2002 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: The drive beam of CTF II can provide single electron bunches with charges of more than 15 nC and rms lengths of less than 0.13 mm. If the bunches are bent in the dipoles of a magnetic bunch compressor, they emit coherent synchrotron radiation with strongly enhanced intensity with respect to incoherent synchrotron radiation. Here we report on the experimental and theoretical study of the effect of this coherent radiation emission on the distribution of the electrons in the six-dimensional phase space. Transverse emittances, bunch lengths, and energy spectra were measured for constant bunch compression ratios but different horizontal beam sizes in the bunch compressor. Further, the shielding effect of the finite vacuum chamber height on the mean beam energy loss was investigated by using two vacuum chambers of different heights in a four-magnet chicane. The results are compared with simulations using TraFiC4 and ELEGANT.
Book Synopsis Synchrotron Radiation by : Jan-Erik Rubensson
Download or read book Synchrotron Radiation written by Jan-Erik Rubensson and published by Morgan & Claypool Publishers. This book was released on 2016-08-01 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synchrotron radiation is the name given to the radiation which occurs when charged particles are accelerated in a curved path or orbit. Classically, any charged particle which moves in a curved path or is accelerated in a straight-line path will emit electromagnetic radiation. Various names are given to this radiation in different contexts. Thus circular particle accelerators are called synchrotrons, this is where charged particles are accelerated to very high speeds and the radiation is referred to as synchrotron radiation. Suitable for a summer short course or one term lecture series this text introduces the subject, starting with some historical background then covering basic concepts such as flux, intensity, brilliance, emittance and Liouville's theorem. The book then covers the properties of synchrotron radiation, insertion devices, beamlines and monochromators before finishing with an introduction to free electron lasers and an overview of the most common techniques and applications of this technology.
Book Synopsis Chirping the LCLS Electron Beam by :
Download or read book Chirping the LCLS Electron Beam written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We explore scenarios for generating a linear time-correlated energy spread in the LCLS electron bunch, prior to the undulator, that is needed for optical (x-ray) pulse compression. The correlated energy spread (''chirp'') is formed by generating an energy gradient along the length of the electron bunch using RF phasing and/or longitudinal wakefields of the accelerating structures. The sign of the correlation is an important limitation. Excluding a complete re-design of the compression systems, the best possibility is to use ''over-compression'' to effect the required energy chirp. This is easily done with only a slight strength increase (≈10%) in the chicane bends of the second compressor. In this case, the bend-plane emittance dilution associated with the increased coherent synchrotron radiation (CSR) in the bunch compressor may, however, significantly compromise the electron beam density. The CSR calculations for the momentary extremely short (≈1 [mu]m) electron bunch during over-compression are quite subtle and an adequate confidence level may not be achievable. A practical limit in this short-pulse scenario may be to use spontaneous rather than FEL radiation. Ignoring the potential emittance growth, a FWHM electron energy spread of 2% is possible.
Book Synopsis Coherent Synchrotron Radiation from an Intense Relativistic Electron Beam by : Victor L. Granatstein
Download or read book Coherent Synchrotron Radiation from an Intense Relativistic Electron Beam written by Victor L. Granatstein and published by . This book was released on 1974 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: When an intense relativistic electron beam was made to traverse a a magnetic field of novel configuration, about 25 MW of microwave power was measured in a narrowband pulse delta omega/omega
Book Synopsis Polarization of Coherent Synchrotron Radiation from an Electron Beam Rotating in a Plasma by : David Tzach
Download or read book Polarization of Coherent Synchrotron Radiation from an Electron Beam Rotating in a Plasma written by David Tzach and published by . This book was released on 1980 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Much Ado about Microbunching by : Daniel F. Ratner
Download or read book Much Ado about Microbunching written by Daniel F. Ratner and published by Stanford University. This book was released on 2011 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: The push to provide ever brighter coherent radiation sources has led to the creation of correspondingly bright electron beams. With billions of electrons packed into normalized emittances (phase space) below one micron, collective effects may dominate both the preservation and use of such ultra-bright beams. An important class of collective effects is due to density modulations within the bunch, or microbunching. Microbunching may be deleterious, as in the case of the Mi- crobunching Instability (MBI), or it may drive radiation sources of unprecedented intensity, as in the case of Free Electron Lasers (FELs). In this work we begin by describing models of microbunching due to inherent beam shot noise, which sparks both the MBI as well as SLAC's Linac Coherent Light Source, the world's first hard X-ray laser. We first use this model to propose a mechanism for reducing the inherent beam shot noise as well as for predicting MBI effects. We then describe experimental measurements of the resulting microbunching at LCLS, including optical radiation from the MBI, as well as the first gain length and harmonic measurements from a hard X-ray FEL. In the final chapters, we describe schemes that use external laser modulations to microbunch light sources of the future. In these sections we describe coherent light source schemes for both both linacs and storage rings.
Book Synopsis Measurements and Analysis of a High-brightness Electron Beam Collimated in a Magnetic Bunch Compressor by :
Download or read book Measurements and Analysis of a High-brightness Electron Beam Collimated in a Magnetic Bunch Compressor written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A collimator located in a magnetic bunch compressor of a linear accelerator driven x-ray free electron laser has many potential applications, such as the removal of horns in the current distribution, the generation of ultrashort beams, and as a diagnostic of the beam slice emittance. Collective effects, however, are a major concern in applying the technique. Systematic measurements of emittance and analysis were performed using a collimator in the first bunch compressor of the Linac Coherent Light Source (LCLS). In the nominal, undercompressed configuration using the collimator we find that the y emittance (nonbending plane) is not increased, and the x emittance (in the bending plane) is increased by about 25%, in comparison to the injector emittance. From the analysis we conclude that the parasitic effects associated with this method are dominated by coherent synchrotron radiation (CSR), which causes a "systematic error" for measuring slice emittance at the bending plane using the collimation method. In general, we find good agreement between the measurements and simulations including CSR. However, for overcompressed beams at smaller collimator gaps, an extra emittance increase is found that does not agree with 1D simulations and is not understood.
Author :Malcolm R. Howells Publisher :SPIE-International Society for Optical Engineering ISBN 13 : Total Pages :280 pages Book Rating :4.3/5 (91 download)
Book Synopsis Coherent Electron-beam X-ray Sources : Techniques and Applications by : Malcolm R. Howells
Download or read book Coherent Electron-beam X-ray Sources : Techniques and Applications written by Malcolm R. Howells and published by SPIE-International Society for Optical Engineering. This book was released on 1997 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synchrotron Radiation by : Settimio Mobilio
Download or read book Synchrotron Radiation written by Settimio Mobilio and published by Springer. This book was released on 2014-08-06 with total page 807 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synchrotron radiation is today extensively used for fundamental and applied research in many different fields of science. Its exceptional characteristics in terms of intensity, brilliance, spectral range, time structure and now also coherence pushed many experimental techniques to previously un-reachable limits, enabling the performance of experiments unbelievable only few years ago. The book gives an up-to-date overview of synchrotron radiation research today with a view to the future, starting from its generation and sources, its interaction with matter, illustrating the main experimental technique employed and provides an overview of the main fields of research in which new and innovative results are obtained. The book is addressed to PhD students and young researchers to provide both an introductory and a rather deep knowledge of the field. It will also be helpful to experienced researcher who want to approach the field in a professional way.
