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.
Download or read book Experimental Studies on Coherent Synchrotron Radiation at an Emittance Exchange Beamline written by and published by . This book was released on 2012 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the goals of the Fermilab A0 photoinjector is to experimentally investigate the transverse to longitudinal emittance exchange (EEX) principle. Coherent synchrotron radiation in the emittance exchange line could limit the performance of the emittance exchanger at short bunch lengths. In this paper, we present experimental and simulation studies of the coherent synchrotron radiation (CSR) in the emittance exchange line at the A0 photoinjector. We report on time-resolved CSR studies using a skew-quadrupole technique. We also demonstrate the advantages of running the EEX with an energy chirped beam.
Download or read book Experimental Study of Coherent Synchrotron Radiation in the Emittance Exchange Line at the A0 photoinjector written by and published by . This book was released on 2010 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Next generation accelerators will require a high current, low emittance beam with a low energy spread. Such accelerators will employ advanced beam conditioning systems such as emittance exchanger to manipulate high brightness beams. One of the goals of the Fermilab A0 photoinjector is to investigate the transverse to longitudinal emittance exchange principle. Coherent synchrotron radiation could limit high current operation of the emittance exchanger. In this paper, we report on the preliminary experimental and simulation study of the coherent synchroton radiation (CSR) in the emittance exchange line at A0 photoinjector.
Download or read book Applications of Synchrotron Radiation written by Wolfgang Eberhardt and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This field has now matured from being an exotic experimental field into a well-established area of science. The spectroscopy of molecules and molecular adsorbates on surfaces is one area of science where synchrotron-radiation-related studies had made an impact on understanding the ground-state properties as well as the dynamics. With the new high-brightness synchrotron-radiation sources ahead, this will certainly continue to be a field of very active research.
Download or read book Synchrotron Radiation Selected Experiments in Condensed Matter Physics written by W. Czaja and published by Birkhäuser. This book was released on 2012-12-06 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present volume contains most of the invited talks and two contributed posters of a workshop which was held in]uly 1990 within the frame of the Centro Stefano Franscini, Monte Verita at Ascona in Switzerland. The main idea has been to demonstrate that in many areas in solid state physics the use of synchrotron radiation as a powerful source for polarized uv radiation between 5 eV and about 1500 eV yields exciting new results. Furthermore, one has tried to attract a larger number of Ph D-students to bring them into contact with experienced people in the field. This tutorial aspect, I su ppose, is also in the spirit of Stefano Franscini, after whom the Centro, a joint undertaking between the Cantone Ticino and the Federal Institute of Technology in Zurich (ETHZ), has been named. Stefano Franscini, himself a dedicated teacher, has been the first member of his Canton in the Swiss Federal Council. As such he has been head of the departement of the interior and has been strongly supporting the foundation of the ETHZ. But he is also reknown, even today, as Cantonal Counceler, who has organised the elementary school system in Ticino.
Download or read book Applications of Synchrotron Radiation written by Ari Ide-Ektessabi and published by Springer Science & Business Media. This book was released on 2007-05-31 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book demonstrates the applications of synchrotron radiation in certain aspects of cell microbiology, specifically non-destructive elemental analyses, chemical-state analyses and imaging (distribution) of the elements within a cell. The basics for understanding and applications of synchrotron radiation are also described to make the contents more easily understood for a wide group of researchers in medical and biological sciences who might not be familiar with the physics of synchrotron radiation.
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.
Download or read book Applications of synchrotron radiation written by Alfonso San Miguel and published by Atlantica Séguier Frontières. This book was released on 1999 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synchrotron Radiation Research written by R.Z. Bachrach and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the summer of 1972, I had the privilege and responsibility of organizing a Gordon Conference on the "High-Energy Spectroscopy of Solids." The Thursday evening session focused on future directions for high-energy spectroscopy. The possibilities associated with synchrotron radiation for future research became a central issue. I was asked to choose the members of the panel and chair the session. Although all five members of the panel went on to have distinguished careers using synchrotron radiation, at the time some of them were skeptical about the future role of synchrotron radiation sources in high-energy photon spectroscopy. The discussion became heated, and many members of the audience spoke, both pro and con. One member of the panel produced a detailed argument that synchrotron radiation would never rival standard X-ray tubes. We found out that there were estimates for properties of synchrotrons that differed by orders of magnitude from those of X-ray tubes. That much uncertainty was expressed at a meeting that took place less than twenty years ago. It is hard to believe that, even though at that time synchrotron radiation was already being used for photoemission studies of solids and surfaces and intershell excitations in solids, the potential impact and importance of this area was not fully realized even by the experts. Today synchrotron radiation is one of the primary tools for studying surfaces, and synchrotron radiation has affected many other areas of condensed-matter physics---even superconductivity.
Download or read book Measurement and Simulations of Intensity dependent Effects in the Fermilab Booster Synchrotron written by Daniel McCarron and published by . This book was released on 2010 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Fermilab Booster is a nearly 40-year-old proton synchrotron, designed to accelerate injected protons from a kinetic energy of 400 MeV to 8 GeV for extraction into the Main Injector and ultimately the Tevatron. Currently the Booster is operated with a typical intensity of 4.5 x 10¹² particles per beam, roughly twice the value of its design, because of the requirement for high particle flux in various experiments. Its relatively low injection energy provides certain challenges in maintaining beam quality and stability under these increasing intensity demands. An understanding of the effects limiting this intensity could provide enhanced beam stability and reduced downtime due to particle losses and subsequent damage to the accelerator elements. Design of future accelerators can also benefit from a better understanding of intensity effects limiting injection dynamics. Chapter 1 provides a summary of accelerator research during the 20th century leading to the development of the modern synchrotron. Chapter 2 puts forth a working knowledge of the terminology and basic theory used in accelerator physics, and provides a brief description of the Fermilab Booster synchrotron. Synergia, a 3d space-charge modeling framework, is presented, along with some simulation benchmarks relevant to topics herein. Emittance, a commonly used quantity characterizing beam size and quality in a particular plane, is discussed in Chapter 3. Space-charge fields tend to couple the motion among the planes, leading to emittance exchange, and necessitating a simultaneous measurement to obtain a complete emittance description at higher intensities. A measurement is described and results are given. RMS beam emittances are shown to be in keeping with known Booster values at nominal intensities and emittance exchange is observed and accounted for. Unmeasurable correlation terms between the planes are quantified using Synergia, and shown to be at most an 8% effect. Results of studies on the coherent and incoherent shifts of transverse (betatron) frequencies with beam intensity at injection energies are presented. In Chapter 4 the coherent frequency shifts are shown to be due to dipole- and quadrupole-wakefield effects. The asymmetry of the Booster beam chamber through the magnets, as well as the presence of magnet laminations, are responsible for the magnitudes and for the opposing signs of the horizontal and vertical tune shifts caused by these wakefields. Chapter 5 details the procedures for obtaining a linear coherent-tune-shift intensity dependence, yielding -0.009/10¹² in the vertical plane and +0.001/10¹² in the horizontal plane. Data demonstrate a requirement of several hundred turns to accumulate to its maximal value. Two independent studies are compared, corroborating these results. In Chapter 6, a measure of the incoherent tune shift with intensity puts an upper limit on the magnitude of the direct space-charge effect in the Fermilab Booster. A prediction is made for the representative incoherent particle tune shift using a realistic Gaussian distribution, allowing for growth of the beam envelope with intensity, and found to be 0.004/10¹². The tune-spread dependence obtained by quantification of the resonant stopband width from beam-extinction measurements was measured at 0.005/10¹², similar to the predicted value. These will be shown to be one order of magnitude smaller than the space-charge term from the Laslett tune shift for a fixed-size, uniform beam.
Download or read book Proceedings of the Workshop on Synchrotron Radiation and Nanostructures written by Antonio Cricenti and published by World Scientific. This book was released on 2009 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book's objective is to present the capabilities of state-of-the-art synchrotron radiation and scanning probe microscopy techniques, together with general theory work, In elucidating the fundamental electronic and structural properties of semiconductor and metal surfaces, interfaces, nanostructures, layers and diverse biological systems.
Download or read book Measurement and Simulations of Intensity dependent Effects in the Fermilab Booster Synchrotron written by and published by . This book was released on 2010 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Fermilab Booster is a nearly 40-year-old proton synchrotron, designed to accelerate injected protons from a kinetic energy of 400 MeV to 8 GeV for extraction into the Main Injector and ultimately the Tevatron. Currently the Booster is operated with a typical intensity of 4.5 x 1012 particles per beam, roughly twice the value of its design, because of the requirement for high particle flux in various experiments. Its relatively low injection energy provides certain challenges in maintaining beam quality and stability under these increasing intensity demands. An understanding of the effects limiting this intensity could provide enhanced beam stability and reduced downtime due to particle losses and subsequent damage to the accelerator elements. Design of future accelerators can also benefit from a better understanding of intensity effects limiting injection dynamics. Chapter 1 provides a summary of accelerator research during the 20th century leading to the development of the modern synchrotron. Chapter 2 puts forth a working knowledge of the terminology and basic theory used in accelerator physics, and provides a brief description of the Fermilab Booster synchrotron. Synergia, a 3d space-charge modeling framework, is presented, along with some simulation benchmarks relevant to topics herein. Emittance, a commonly used quantity characterizing beam size and quality in a particular plane, is discussed in Chapter 3. Space-charge fields tend to couple the motion among the planes, leading to emittance exchange, and necessitating a simultaneous measurement to obtain a complete emittance description at higher intensities. A measurement is described and results are given. RMS beam emittances are shown to be in keeping with known Booster values at nominal intensities and emittance exchange is observed and accounted for. Unmeasurable correlation terms between the planes are quantified using Synergia, and shown to be at most an 8% effect. Results of studies on the coherent and incoherent shifts of transverse (betatron) frequencies with beam intensity at injection energies are presented. In Chapter 4 the coherent frequency shifts are shown to be due to dipole- and quadrupole-wakefield effects. The asymmetry of the Booster beam chamber through the magnets, as well as the presence of magnet laminations, are responsible for the magnitudes and for the opposing signs of the horizontal and vertical tune shifts caused by these wakefields. Chapter 5 details the procedures for obtaining a linear coherent-tune-shift intensity dependence, yielding -0.009/1012 in the vertical plane and +0.001/1012 in the horizontal plane. Data demonstrate a requirement of several hundred turns to accumulate to its maximal value. Two independent studies are compared, corroborating these results. In Chapter 6, a measure of the incoherent tune shift with intensity puts an upper limit on the magnitude of the direct space-charge effect in the Fermilab Booster. A prediction is made for the representative incoherent particle tune shift using a realistic Gaussian distribution, allowing for growth of the beam envelope with intensity, and found to be 0.004/1012. The tune-spread dependence obtained by quantification of the resonant stopband width from beam-extinction measurements was measured at 0.005/1012, similar to the predicted value. These will be shown to be one order of magnitude smaller than the space-charge term from the Laslett tune shift for a fixed-size, uniform beam.
Download or read book Chemical Applications Of Synchrotron Radiation Part I Dynamics And Vuv Spectroscopy Part Ii X ray Applications written by Tsun-kong Sham and published by World Scientific. This book was released on 2002-05-30 with total page 1302 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synchrotron light source is becoming widely available, after its evolution from its infancy in the sixties to the present third generation source with insertion devices. It is timely to examine the impact that synchrotron light has made and will continue to make on chemical research. With this objective in mind, the editor of this invaluable book invited contributions from practitioners who are in the forefront of the research. The book summarizes most of the significant developments in the last decade in chemical and related research using synchrotron light. The utilization of the light as a probe as well as an energy source is emphasized.This book is organized into two parts, in order of increasing photon energy. Part I deals with the applications of low energy photons and covers areas such as gas phase photodissociation reactions and dynamics, soft X-ray fluorescence, IR and photoemission analysis of surfaces, spectroscopy of organic and polymeric materials, catalysts, electronic and magnetic materials, and spectromicroscopy. Part II encompasses applications using soft to hard X-rays, including spectroscopy of surface and thin films, XAFS, diffraction and scattering, and several technological applications, namely the microprobe, photoetching and tribology.
Download or read book Stanford Synchrotron Radiation Laboratory Activity Report 10 1 78 3 31 79 written by Stanford Synchrotron Radiation Laboratory. Stanford Synchrotron Radiation Laboratory and published by . This book was released on 1979 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Emittance Growth from Transient Coherent Synchrotron Radiation written by and published by . This book was released on 1996 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: If the energies of individual particles in a bunch change as the bunch traverses a bending system, even if it is achromatic, betatron oscillations can be excited. Consequently, the transverse emittance of the bunch will grow as it moves downstream. Short bunches may be particularly susceptible to emission of coherent synchrotron radiation which can act back on the particles to change their energies and trajectories. Because a bend spans a well-defined length and angle, the bunch-excited wakefield and its effect back on the bunch are inherently transient. We outline a recently developed theory of this effect and apply it to example bending systems.
Download or read book Synchrotron Radiation Sources and Applications written by G.N Greaves and published by CRC Press. This book was released on 1989-01-01 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synchrotron radiation facilities embrace an unusually wide range of scientific and technical skills, including high brilliance electron accelerator technology, ultra high vacuum precision engineering, and beamline optical engineering. With individual contributions from specialists in each area, Synchrotron Radiation Sources and Applications comprehensively covers various topics, from the basic theory of synchrotron radiation to its uses as an experimental tool in atomic, molecular, and solid-state physics.
