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ISBN 13 :
Total Pages : 35 pages
Book Rating : 4.:/5 (929 download)
Download or read book Final Focus Plasma Lenses in Linear Colliders written by and published by . This book was released on 1988 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Final Focus Plasma Lenses in Linear Colliders written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper we analyze the optics of a high energy beam which is focused by its own wake-fields in an overdense plasma. We calculate the effects of lens aberration on the focusing strength of the lens and on the dilution of the beam's phase space density. From this we derive the minimum spot size achievable using a cylindrically symmetric bi-Gaussian beam and, after inclusion of the beam-beam disruption effect, the luminosity enhancement that can be gained in principle. We estimate the luminosity enhancement in the case of SLC design parameters and discuss limitations and possible improvements in plasma lens performance. Motivated by the need to reduce the background event rate due to beam-ion collisions, we discuss the optics of the underdense plasma lens and introduce the concept of bootstrap disruption. Possible use of the underdense plasma lens in a TLC-type collider is examined. 14 refs., 5 figs., 1 tab.
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ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (929 download)
Download or read book A Plasma Lens for a Linear Collider Final Focus written by and published by . This book was released on 1987 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 3 pages
Book Rating : 4.:/5 (727 download)
Download or read book Plasma Lens Experiments at the Final Focus Test Beam written by and published by . This book was released on 1993 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: We intend to carry out a series of plasma lens experiments at the Final Focus Test Beam facility at SLAC. These experiments will be the first to study the focusing of particle beams by plasma focusing devices in the parameter regime of interest for high energy colliders, and is expected to lead to plasma lens designs capable of unprecedented spot sizes. Plasma focusing of positron beams will be attempted for the first time. We will study the effects of lens aberrations due to various lens imperfections. Several approaches will be applied to create the plasma required including laser ionization and beam ionization of a working gas. At an increased bunch population of 2.5 x 101°, tunneling ionization of a gas target by an electron beam -- an effect which has never been observed before -- should be significant. The compactness of our device should prove to be of interest for applications at the SLC and the next generation linear colliders.
Download or read book A Plasma Lens for a Linear Collider Final Focus written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High density relativistic beams propagating in a plasma are affected by fields induced by plasma motion. We consider the possible use of a plasma cell very close to the interaction point of a linear collider where the self-pinch induced in the relativistic beams can be used to increase the luminosity of colliding beams. We describe the benefits of this self-pinch, as well as some engineering details on the production of the required plasma. 18 refs., 5 figs., 1 tab.
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ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (684 download)
Download or read book The Plasma Lens as an E- E- Luminosity Enhancer written by and published by . This book was released on 2003 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is important to demonstrate the use of plasmas for focusing positron and electron beams at high energy. By reducing the transverse area of colliding beams the plasma optical element affords a potential simplicity for enhancing the luminosity in the interaction region of linear colliders. Focusing of both transverse dimensions as well as both charge states has generated interest in this technology as a final focusing element. Furthermore, the focusing strength of a plasma lens can exceed that of conventional magnets by orders of magnitude. The balance (in vacuum) between the radial electric and toroidal magnetic fields accompanying the single bunch of an electron or positron beam is lost in the plasma environment. Within time scales determined by the plasma frequency, plasma electrons can rapidly migrate to achieve a balance between the beam-induced field and collective plasma field. Canceling the radial bunch field alone will result in a self ''pinching'' of the single beam bunch by the unchecked toroidal field. The dynamics of this focusing action are determined by the beam bunch and plasma densities. For plasma densities in excess of 1018 cm−3 the plasma oscillation period (which characterizes its response time) is less than 100 femtoseconds. In addition to addressing the feasibility of the plasma lens as a high energy linear collider final focus element, this work is also motivated by the need to better understand the interaction of particle beams with plasmas. Testing the feasibility as a linear collider final focusing element requires use of appropriate plasma and beam bunch parameters such as density. Examining the beam-plasma interaction facilitates the design of simple, compact, and economical plasma lenses for high energy applications.
Download or read book Final Focus Systems for Linear Colliders written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The final focus system of a linear collider must perform two primary functions, it must focus the two opposing beams so that their transverse dimensions at the interaction point are small enough to yield acceptable luminosity, and it must steer the beams together to maintain collisions. In addition, the final focus system must transport the outgoing beams to a location where they can be recycled or safely dumped. Elementary optical considerations for linear collider final focus systems are discussed, followed by chromatic aberrations. The design of the final focus system of the SLAC Linear Collider (SLC) is described. Tuning and diagnostics and steering to collision are discussed. Most of the examples illustrating the concepts covered are drawn from the SLC, but the principles and conclusions are said to be generally applicable to other linear collider designs as well. 26 refs., 17 figs. (LEW).
Download or read book The Development of Plasma Lenses for Linear Colliders written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The plasma lens, first proposed by Chen, can in principle raise the luminosity of a linear collider with minimal interaction with the accelerator systems, nevertheless the short focal length lens design does interact strongly with the design of the particle detector at the interaction point. We have thus considered a of number options for using the lens and have begun to test plasma focusing experimentally. This paper briefly reviews constraints on use of the lens and its proposed operating modes, and then describes tests of a prototype valve/nozzle system and experimental tests of focusing. 10 refs., 3 figs.
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ISBN 13 :
Total Pages : 332 pages
Book Rating : 4.0/5 ( download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-03 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 156 pages
Book Rating : 4.:/5 (683 download)
Download or read book Expanded Studies of Linear Collider Final Focus Systems at the Final Focus Test Beam written by and published by . This book was released on 1995 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to meet their luminosity goals, linear colliders operating in the center-of-mass energy range from 3,50 to 1,500 GeV will need to deliver beams which are as small as a few Manometers tall, with x:y aspect ratios as large as 100. The Final Focus Test Beam (FFTB) is a prototype for the final focus demanded by these colliders: its purpose is to provide demagnification equivalent to those in the future linear collider, which corresponds to a focused spot size in the FFTB of 1.7 microns (horizontal) by 60 manometers (vertical). In order to achieve the desired spot sizes, the FFTB beam optics must be tuned to eliminate aberrations and other errors, and to ensure that the optics conform to the desired final conditions and the measured initial conditions of the beam. Using a combination of incoming-beam diagnostics. beam-based local diagnostics, and global tuning algorithms, the FFTB beam size has been reduced to a stable final size of 1.7 microns by 70 manometers. In addition, the chromatic properties of the FFTB have been studied using two techniques and found to be acceptable. Descriptions of the hardware and techniques used in these studies are presented, along with results and suggestions for future research.
Download or read book A Conceptual Design of Final Focus Systems for Linear Colliders written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Linear colliders are a relatively recent development in the evolution of particle accelerators. This report discusses some of the approaches that have been considered for the design of Final Focus Systems to demagnify the beam exiting from a linac to the small size suitable for collisions at the interaction point. The system receiving the most attention is the one adopted for the SLAC Linear Collider. However, the theory and optical techniques discussed should be applicable to the design efforts for future machines.
Author : V. Stefan
Publisher : Springer Science & Business Media
ISBN 13 : 9780883187876
Total Pages : 786 pages
Book Rating : 4.1/5 (878 download)
Download or read book Nonlinear and Relativistic Effects in Plasmas written by V. Stefan and published by Springer Science & Business Media. This book was released on 1991-11-01 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Blurb & Contents" Culled from the thousands of papers published in American Institute of Physics Soviet Translation journals during 1987 and 1988, this reprint collection presents 91 of the Russia's finest papers on semiconductor physics and technology. In their selections, the editors were advised and assisted by leading experts in the field from both Russia and the United States, resulting in a collection objectively representing only the most important and enduring Russian contributions to semiconductor physics and technology.
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ISBN 13 :
Total Pages : 1048 pages
Book Rating : 4.:/5 (31 download)
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter Gregory Tenenbaum
Publisher :
ISBN 13 :
Total Pages : 668 pages
Book Rating : 4.:/5 (321 download)
Download or read book Expanded Studies of Linear Collider Final Focus Systems at the Final Focus Test Beam written by Peter Gregory Tenenbaum and published by . This book was released on 1995 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Luigi Palumbo
Publisher : World Scientific
ISBN 13 : 9812772170
Total Pages : 729 pages
Book Rating : 4.8/5 (127 download)
Download or read book The Physics and Applications of High Brightness Electron Beams written by Luigi Palumbo and published by World Scientific. This book was released on 2007 with total page 729 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings comprise cutting-edge contributions by researchers at the frontiers of beam physics, free-electron-based light sources, and advanced accelerators. It represents a snap-shot of activity in these fields at a critical historical juncture, where rapid experimental progress is being reported, and new facilities such as X-ray free-electron lasers are under construction. The volume features invited contributions from leading researchers from the international beam physics community that summarize the state-of-the-art research in individual topics, as well as timely contributions from participants that arose during the workshop itself.
Download or read book Transverse Focussing Using Plasma Wake Fields written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dense particle beams traveling in plasmas can produce very high electric and magnetic fields, and these fields can be used to accelerate and focus particles. The effects on trailing beams and self focusing can be strong and nonlinear. This paper discusses two aspects of self pinching beams: (1) the production of beams which do not self pinch, and (2) a short focal length plasma lens which uses self pinching to reduce beam sizes at the interaction point of a linear collider. As an example, a final focus system for the Stanford Linear Collider is considered. It is shown how the luminosity could be increased using this system.
Author : Chandler McDowell
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (119 download)
Download or read book Field Calculation and Optimization of a Linear Collider Final Focus Quadrupole Lens with Tri-planar Pole Tips written by Chandler McDowell and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
