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Author : Bolko Beutner
Publisher :
ISBN 13 :
Total Pages : 125 pages
Book Rating : 4.:/5 (254 download)
Download or read book Measurement and Analysis of Coherent Synchrotron Radiation Effects at FLASH written by Bolko Beutner and published by . This book was released on 2007 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher Behrens
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (551 download)
Download or read book Detection and Spectral Measurements of Coherent Synchrotron Radiation at FLASH written by Christopher Behrens and published by . This book was released on 2008 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (727 download)
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.
Author :
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (727 download)
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.
Author : Settimio Mobilio
Publisher : Springer
ISBN 13 : 364255315X
Total Pages : 807 pages
Book Rating : 4.6/5 (425 download)
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.
Author :
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (684 download)
Download or read book COHERENT SYNCHROTRON RADIATION ANALYSIS FOR THE PHOTOINJECTED ENERGY RECOVERY LINAC AND UVFEL PROJECTS AT THE NSLS. written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coherent Synchrotron Radiation (CSR) effects in bunch compressors are analyzed. Schemes for reducing the CSR effects are presented.
Author :
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (727 download)
Download or read book Investigation of the Coherent Synchrotron Radiation Spectrum as a Probe of Charge Dynamics. Progress Report written by and published by . This book was released on 1993 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coherent synchrotron, Cherenkov and transition radiation have generated and measured in the far infrared spectral region. This work represents the first identification and separation of the Cherenkov and transition radiation components with transition radiation producing the strongest signal. High-intensity picosecond pulses of radiation are observed for all three sources. The angular dependence in the mm wave region is not the same as that given by high-frequency radiation expressions since the wavelength and the beam radiator size are comparable; hence diffraction effects are important. A prototype polarizing Michelson interferometer has been designed, constructed and is now being tested. The diffraction-limited design meets the demands of the rigorous space and experimental conditions in the linac area. The instrument is of rugged constructed using retroreflectors and thus is optically stable for long periods of time. It contains both reference and interferogram detectors to minimize the influence of linac drifts on the data analysis. To eliminate the intensity loss at low frequencies due to diffraction and waveguide effects the next generation of interferometer and detector will have 2x larger apertures.
Author : Giuseppe Dattoli
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (876 download)
Download or read book Study of Coherent Synchrotron Radiation Effects by Means of a New Simulation Code Based on the Non-linear Extension of the Operator Splitting Method written by Giuseppe Dattoli and published by . This book was released on 2006 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (727 download)
Download or read book Investigation of the Coherent Synchrotron Radiation Spectrum as a Probe of Charge Dynamics written by and published by . This book was released on 1993 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coherent synchrotron, Cherenkov and transition radiation have generated and measured in the far infrared spectral region. This work represents the first identification and separation of the Cherenkov and transition radiation components with transition radiation producing the strongest signal. High-intensity picosecond pulses of radiation are observed for all three sources. The angular dependence in the mm wave region is not the same as that given by high-frequency radiation expressions since the wavelength and the beam radiator size are comparable; hence diffraction effects are important. A prototype polarizing Michelson interferometer has been designed, constructed and is now being tested. The diffraction-limited design meets the demands of the rigorous space and experimental conditions in the linac area. The instrument is of rugged constructed using retroreflectors and thus is optically stable for long periods of time. It contains both reference and interferogram detectors to minimize the influence of linac drifts on the data analysis. To eliminate the intensity loss at low frequencies due to diffraction and waveguide effects the next generation of interferometer and detector will have 2x larger apertures.
Author :
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (685 download)
Download or read book Commissions scolaires qui offrent la formation à distance à compter de janvier 1995 written by and published by . This book was released on 1995 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 3 pages
Book Rating : 4.:/5 (684 download)
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.
Author :
Publisher :
ISBN 13 :
Total Pages : 3 pages
Book Rating : 4.:/5 (873 download)
Download or read book Experimental Studies on Coherent Synchrotron Radiaiton in the Emittance Exchange Line at the Fermilab A0 Photoinjector written by and published by . This book was released on 2011 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Future accelerators will employ advanced beam conditioning systems such as emittance exchangers to manipulate high brightness beams. Coherent synchrotron radiation (CSR) in the dipoles could limit the performance of the emittance exchanger. In this paper, we report the experimental studies on measuring CSR and its effects on the beam at the A0 photoinjector in the emittance exchange line. After reporting the CSR power measurements, we report on the diagnostic scheme based on a weak skew quad in the emittance exchange line to study the CSR effects on the beam and other beam dynamics. In this work, we have reported on CSR measurements and the effect of skew quad on the dogleg line with the 5-cell turned on and off. We plan to study CSR effects on the bunch with the 5-cell on at larger chirp. This is will not only increase the CSR self-effect but also reduce the beamsize at the screen for convenient beamsize measurements.
Author : Rui Li
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (898 download)
Download or read book Analysis on the Steady-state Coherent Synchrotron Radiation with Strong Shielding, May 1997 written by Rui Li and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (684 download)
Download or read book Analysis on the Steady-state Coherent Synchrotron Radiation with Strong Shielding written by and published by . This book was released on 1997 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are several papers concerning shielding of coherent synchrotron radiation (CSR) emitted by a Gaussian line charge on a circular orbit centered between two parallel conducting plates. Previous asymptotic analyses in the frequency domain show that shielded steady-state CSR mainly arises from harmonics in the bunch frequency exceeding the threshold harmonic for satisfying the boundary conditions at the plates. In this paper the authors extend the frequency-domain analysis into the regime of strong shielding, in which the threshold harmonic exceeds the characteristic frequency of the bunch. The result is then compared to the shielded steady-state CSR power obtained using image charges.
Download or read book Measurements of Transverse Emittance Growth Due to Coherent Synchrotron Radiation in the SLAC SPPS Bunch Compressor Chicane written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A four-dipole bunch compressor chicane has recently been installed in the SLAC linac at 9 GeV and is capable of compressing a 3.4-nC electron bunch to an rms length of 50 microns, resulting in a peak current of nearly 10 kA[1]. The electron bunch is extracted from a damping ring with normalized horizontal emittance of[approx] 30[micro]m. We present preliminary measurements of the initial and final emittance in the chicane and compare these to 1D and 3D calculations of the effects of coherent synchrotron radiation (CSR).
Author :
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (16 download)
Download or read book Coherent Synchrotron Radiation written by and published by . This book was released on 2012 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physics of coherent synchrotron radiation (CSR) emitted by ultra-relativistic electron bunches, known since the last century, has become increasingly important with the development of high peak current free electron lasers and shorter bunch lengths in storage rings. Coherent radiation can be described as a low frequency part of the familiar synchrotron radiation in bending magnets. As this part is independent of the electron energy, the fields of different electrons of a short bunch can be in phase and the total power of the radiation will be quadratic with the number of electrons. Naturally the frequency spectrum of the longitudinal electron distribution in a bunch is of the same importance as the overall electron bunch length. The interest in the utilization of high power radiation from the terahertz and far infrared region in the field of chemical, physical and biological processes has led synchrotron radiation facilities to pay more attention to the production of coherent radiation. Several laboratories have proposed the construction of a facility wholly dedicated to terahertz production using the coherent radiation in bending magnets initiated by the longitudinal instabilities in the ring. Existing synchrotron radiation facilities also consider such a possibility among their future plans. There is a beautiful introduction to CSR in the 'ICFA Beam Dynamics Newsletter' N 35 (Editor C. Biscari). In this paper we recall the basic properties of CSR from the theory and what new effects, we can get from the precise simulations of the coherent radiation using numerical solutions of Maxwell's equations. In particular, transverse variation of the particle energy loss in a bunch, discovered in these simulations, explains the slice emittance growth in bending magnets of the bunch compressors and transverse de-coherence in undulators. CSR may play same the role as the effect of quantum fluctuations of synchrotron radiation in damping rings. It can limit the minimum achievable emittance in the synchrotron light sources for short bunches.
Author : Donish Zaman Khan
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (119 download)
Download or read book Coherent Synchrotron Radiation Effect Mitigation Studies for High Brightness Beams/accelerators written by Donish Zaman Khan and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Many particle accelerator applications today call for high-brightness electron beams. In this dissertation, research is described on the mechanisms driving self-radiating forces arising from high-brightness beam environments and the mitigation of such forces. In the first half of the dissertation, we will focus on quantifying the Coherent Synchrotron Radiation (CSR) Effect for various accelerator scenarios. New expressions for the CSR RMS energy spread are developed for transient regime with and without bunch compression and for the subsequent drift section after a bend. The expressions are rigorously tested with the particle tracking codes ELEGANT and CSRTrack [14, 15]. In the latter half, we will take a particular focus on the final-stage bunch compression systems of linacs for X-ray free-electron lasers (XFEL), where these self-forces are prevalent, and introduce a new bunch compressor chicane design: the 5-Bend chicane. The new chicane's performance is compared versus a standard 4-Bend chicane in terms of emittance preservation and XFEL performance in a comprehensive simulation study. Though the work presented here pertains to the XFEL linac environment, the physics and techniques can be applied to any sort of accelerator involving high-peak current, low-emittance charged particle beams.
