Download or read book Luminosity and Energy Studies at a Future Linear Collider with an Emphasis on Biases in the Luminosity weighted Center of mass Energy written by Arik Florimonte and published by . This book was released on 2005 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gesch ftsbericht Kreissparkasse Hilpoltstein Kreditanstalt d ffentl written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Luminosity for E e Linear Collider Designs at 1 7 TeV written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The total luminosity for e−e− mode compared to that for ee− mode is severely reduced in a very high energy linear collider, because the mutual disruption of the beams blows up the beams instead of pinching them down. However, since an e−e− machine has less beamstrahlung than an e−e− machine with the same parameters, the luminosity near the peak energy is not degraded as much as the total luminosity. We quantify these effects for two representative designs at 1.7 TeV center of mass.
Download or read book Luminosity Spectrum Measurement in Future E e Linear Colliders Using Large angle Bhaha Events written by N. Toomi and published by . This book was released on 1997 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics And Experiments With Linear Colliders In 2 Vols written by P Eerola and published by World Scientific. This book was released on 1992-11-20 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt: This workshop brought together for the first time accelerator experts as well as experimental and theoretical high energy physicists from all over the world to consider the physics potential of high energy linear electron-positron colliders. A wide variety of physics cases were presented ranging from precision tests of the top quark and electroweak gauge bosons to searches of the intermediate mass Higgs bosons and supersymmetric particles.
Download or read book Experimental Approaches at Linear Colliders written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Precision measurements have played a vital role in our understanding of elementary particle physics. Experiments performed using e[sup+]e[sup -] collisions have contributed an essential part. Recently, the precision measurements at LEP and SLC have probed the standard model at the quantum level and severely constrained the mass of the Higgs boson[1]. Coupled with the limits on the Higgs mass from direct searches[2], this enables the mass to be constrained to be in the range 115-205 GeV. Developments in accelerator R and D have matured to the point where one could contemplate construction of a linear collider with initial energy in the 500 GeV range and a credible upgrade path to[approx] 1 TeV. Now is therefore the correct time to critically evaluate the case for such a facility. The Working Group E3, Experimental Approaches at Linear Colliders, was encouraged to make this evaluation. The group was charged with examining critically the physics case for a Linear Collider (LC) of energy of order 1 TeV as well as the cases for higher energy machines, assessing the performance requirements and exploring the viability of several special options. In addition it was asked to identify the critical areas where R and D is required (the complete text of the charge can be found in the Appendix). In order to address this, the group was organized into subgroups, each of which was given a specific task. Three main groups were assigned to the TeV-class Machines, Multi-TeV Machines and Detector Issues. The central activity of our working group was the exploration of TeV class machines, since they are being considered as the next major initiative in high energy physics. We have considered the physics potential of these machines, the special options that could be added to the collider after its initial running, and addressed a number of important questions. Several physics scenarios were suggested in order to benchmark the physics reach of the linear collider and persons were appointed to maintain contacts with the relevant activities in the various Physics Working Groups. Special options considered were precision electroweak studies that could be done by running the collider at and near the Z pole (so called Giga Z running); collisions involving[gamma][gamma], e[sup -]e[sup -], or e[gamma] interactions; and positron beam polarization. The following questions were posed in order to focus the discussions: (1) In view of the fact that the luminosity is a function of energy, what are the trade-offs involved in selecting the energy. (2) What is the argument for proceeding with the construction of a Linear collider as soon as possible rather than waiting for data from LHC? (3) In the context of a definite physics scenario, what is a realistic run plan? i.e. How much luminosity at each energy? (4) What should be the initial energy of a linear collider and to what energy should that machine extended?
Download or read book Physics And Experiments With Linear Colliders Lcws95 Proceedings Of The Workshop In 2 Volumes written by Yoshiaki Fujii and published by World Scientific. This book was released on 1996-08-22 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collider experiments have become essential to studying elementary particles. In particular, lepton collisions such as e⁺e⁻ are ideal from both experimental and theoretical points of view, and are a unique means of probing the new energy region, sub-TeV to TeV. It is a common understanding that a next-generation e⁺e⁻ collider will have to be a linear machine that evades beam-energy losses due to synchrotron radiation. In this book, physics feasibilities at linear colliders are discussed in detail, taking into account the recent progress in high-energy physics.
Download or read book Differential Luminosity Under Beamstrahlung written by and published by . This book was released on 1991 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the next generation of ee− linear colliders in the TeV range, the energy loss due to beamstrahlung during the collision of the ee− beams is expected to be substantial. One consequence is that the center-of-mass energy between the colliding particles can be largely degraded from the designed value. The knowledge on the differential luminosity as a function of the center-of-mass energy is essential for particle physics analysis on the interesting events. In this paper we derive an analytic formula for such a differential luminosity which agrees very well with computer simulations. A major characteristic of this formula is discussed. 5 refs., 1 fig.
Download or read book Determination of the Absolute Luminosity at the LHC written by Simon White and published by . This book was released on 2010 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: For particle colliders, the most important performance parameters are the beam energy and the luminosity. High energies allow the particle physics experiments to study and observe new effects. The luminosity describes the ability of the collider to produce the required number of useful interactions or events. The Large Hadron Collider (LHC) was designed to produce proton proton collisions at a center of mass energy of 14 TeV. This energy is the highest ever reached in a particle accelerator. The knowledge and understanding of particIe physics at such high energy is based on simulations and theoretical predictions. As opposed to electron positron colliders, for which the Bhabba scattering cross section can be accurately calculated and used for luminosity calibration, there are no processes with well known cross section and sufficiently high production rate to be directly used for the purpose of luminosity calibration in the early operation of the LHC. The luminosity can also be expressed as a function of the numbers of charges per beam and the beam sizes at the interaction point. Using this relation the absolute luminosity can be determined from machine parameters. The determination of the absolute luminosity from machine parameters is an alternative to the cross section based calibration and provides complementary information to the fragmentation model. ln the LHC, it was proposed to use the method developed by S. Van Der Meer at the ISR to provide a luminosity calibration based on machine parameters to the physics experiments during the first year of operation. This thesis presents how this method was implemented and performed for the first time in the LHC to optimize and calibrate the luminosity. Additional beam dynamics and optics studies and measurements performed at the RHIC collider will also be presented.
Download or read book Very High Energy Colliders written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The conclusions are relatively simple, but represent a considerable challenge to the machine builder. High luminosity is essential. We may in the future discover some new kind of high cross section physics, but all we know now indicates that the luminosity has to increase as the square of the center of mass energy. A reasonable luminosity to scale from for electron machines would be 1033 cm−2 s−1 at a center of mass energy of 3 TeV. The required emittances in very high energy machines are small. It will be a real challenge to produce these small emittances and to maintain them during acceleration. The small emittances probably make acceleration by laser techniques easier, if such techniques will be practical at all. The beam spot sizes are very small indeed. It will be a challenge to design beam transport systems with the necessary freedom from aberration required for these small spot sizes. It would of course help if the beta functions at the collision points could be reduced. Beam power will be large - to paraphrase the old saying, ''power is money'' - and efficient acceleration systems will be required.
Download or read book EFFECTS OF DYNAMIC MISALIGNMENTS AND FEEDBACK PERFORMANCE ON LUMINOSITY STABILITY IN LINEAR COLLIDERS written by and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of high energy linear colliders depends critically on the stability with which they can maintain the collisions of nanometer-size beams. Ground motion and vibration, among other effects, will produce dynamic misalignments which can offset the beams at the collision point. A system of train-to-train and intra-train beam-beam feedbacks, possibly combined with additional beam-independent active systems, is planned to compensate for these effects. Extensive simulation studies of ground motion and luminosity stabilization have been performed as part of the work of the International Linear Collider Technical Review Committee [1]. This paper presents a comparison of the expected performance for TESLA, JLC/NLC and CLIC under various assumptions about feedbacks and the level of ground motion.
Download or read book Future High Energy Colliders written by Zohreh Parsa and published by . This book was released on 1997 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation The 21 papers offer personal perspectives by theoretical, experimental, and accelerator physicists on the physics objectives and technological demands of future colliders. They include a historical perspective of Higgs physics, strongly interacting new physics, precision physics at LHC, the TESLA superconducting linear collider, linear electron-electron colliders, and scaling linear colliders to 5 TeV and above. No subject index. Annotation c. by Book News, Inc., Portland, Or.
Download or read book Luminosity Limitations of Linear Colliders Based on Plasma Acceleration written by and published by . This book was released on 2016 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle acceleration in plasma creates a possibility of exceptionally high accelerating gradients and appears as a very attractive option for future linear electron-positron and/or photon-photon colliders. These high accelerating gradients were already demonstrated in a number of experiments. Furthermore, a linear collider requires exceptionally high beam brightness which still needs to be demonstrated. In this article we discuss major phenomena which limit the beam brightness of accelerated beam and, consequently, the collider luminosity.
Download or read book Signals for Extra Dimensions at CLIC written by and published by . This book was released on 2001 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: A brief overview is presented of the signatures for several different models with extra dimensions at CLIC, an ee− linear collider with a center of mass energy of 3-5 TeV and an integrated luminosity of order 1 ab−1. In all cases the search reach for the resulting new physic signatures is found to be in the range of (almost equal to) 15-80 TeV.
Download or read book Quantum Suppression of Beamstrahlung for Future E e Linear Colliders written by and published by . This book was released on 1998 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beamstrahlung at interaction point may present severe limitations on linear collider performance. The approach to reduce this effect adopted for all current designs at a center-of-mass energy of 0.5 TeV will become more difficult and less effective at higher energy. We discuss the feasibility of an alternative approach, based on an effect known as quantum suppression of beamstrahlung, for future linear colliders at multi-TeV energy.
Download or read book Status Report of a High Luminosity Muon Collider and Future Research and Development Plans written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Case for a 500 GeV Ee Linear Collider written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Several proposals are being developed around the world for an ee linear collider with an initial center of mass energy of 500 GeV. In this paper, the authors discuss why a project of this type deserves priority as the next major initiative in high energy physics.
