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Status Of High Energy Electron Cooling In Fnals Recycler Ring
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Book Synopsis Status of High Energy Electron Cooling in FNAL's Recycler Ring by : A. Warner
Download or read book Status of High Energy Electron Cooling in FNAL's Recycler Ring written by A. Warner and published by . This book was released on 2006 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron cooling of 8 GeV antiprotons at Fermilab's Recycler storage ring is now routinely used in the collider operation. It requires a 0.1-0.5 A, 4.3 MeV DC electron beam to increase the longitudinal phase-space density of the circulating antiproton beam. This paper discusses the latest status of the electron cooler and its mode of operation within the context of Fermilab's accelerator complex. In addition, we will show preliminary results that demonstrate electron cooling of the transverse phase-space of the antiproton beam.
Book Synopsis معجم رجال الفكر و الادب في النجف خلال الف عام by :
Download or read book معجم رجال الفكر و الادب في النجف خلال الف عام written by and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Status of the Electron Cooling Experiment by :
Download or read book Status of the Electron Cooling Experiment written by and published by . This book was released on 1978 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Medium Energy Electron Cooling R and D at Fermilab -- Context and Status by :
Download or read book Medium Energy Electron Cooling R and D at Fermilab -- Context and Status written by and published by . This book was released on 1996 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron cooling at the proposed Recycler 8 GeV storage ring has been identified as a key element in exploiting the capacity of the Fermilab Main Injector for an additional factor of ten in Tevatron luminosity above the goal for the next collider run, ultimately to> 1033 cm−2s−1. The most basic requirement for increased luminosity is a large stack of antiprotons cooled to emittance comparable to that of the proton beam. Although electron cooling is inferior to the stochastic technique for cooling large emittance beams, its rate is practically independent of the antiproton intensity. For cooling intense beams of low or moderate emittance, electron cooling excels. The realization of electron cooling for 8 GeV antiprotons requires major extension of existing practice in electron energy and length of the cooling interaction region. It will require 4.3 MeV dc electron beam maintaining high quality and precise collinearity with the antiprotons over a 66 m straight section. The initial goal of the R and D project is 200 mA electron current in about three years; the plan is to reach 2 A over the following three years.
Book Synopsis Electron Cooling Rates Characterization at Fermilab's Recycler by :
Download or read book Electron Cooling Rates Characterization at Fermilab's Recycler written by and published by . This book was released on 2007 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 0.1 A, 4.3 MeV DC electron beam is routinely used to cool 8 GeV antiprotons in Fermilab's Recycler storage ring [1]. The primary function of the electron cooler is to increase the longitudinal phase-space density of the antiprotons for storing and preparing high-density bunches for injection into the Tevatron. The longitudinal cooling rate is found to significantly depend on the transverse emittance of the antiproton beam. The paper presents the measured rates and compares them with calculations based on drag force data.
Book Synopsis Optimization of Electron Cooling in the Recycler by :
Download or read book Optimization of Electron Cooling in the Recycler written by and published by . This book was released on 2009 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antiprotons in Fermilab's Recycler ring are cooled by a 4.3 MeV, 0.1A DC electron beam (as well as by a stochastic cooling system). The paper describes electron cooling improvements recently implemented: adjustments of electron beam line quadrupoles to decrease the electron angles in the cooling section and better stabilization and control of the electron energy.
Download or read book The Recycler Electron Cooler written by and published by . This book was released on 2013 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Recycler Electron cooler was the first (and so far, the only) cooler working at a relativistic energy ([gamma] = 9.5). It was successfully developed in 1995-2004 and was in operation at Fermilab in 2005-2011, providing cooling of antiprotons in the Recycler ring. This paper describes the cooler, difficulties in achieving the required electron beam parameters and the ways to overcome them, cooling measurements, and details of operation.
Book Synopsis Prospectus for an Electron Cooling System for the Recycler by :
Download or read book Prospectus for an Electron Cooling System for the Recycler written by and published by . This book was released on 1998 with total page 775 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Recycler ring was added to the Main Injector (MI) project in 1997 as means to recover the antiprotons remaining at the end of Tevatron stores and to serve as a second stage accumulator to raise the maximum stack current. This report describes an electron cooling system with substan-tially higher stack capacity than the Recycler stochastic cooling system which could be brought into operation toward the end of Run II. It is the major component of a program to double the de-sign Run II luminosity and should have a positive effect on integrated luminosity soon after turn-on. The upgrade potential is intended to meet the longer term needs of the Laboratory s luminosity upgrade program. The current experience with electron cooling is discussed to provide the ratio-nale for the choice of design parameters and to make clear the needs for additional development work. Both analytical and numerical development of the theory has been pursued to confirm that the limits in principle are well beyond foreseen need. The specific hardware described is not the only realization that has been considered, but it is in some ways the most conservative. The gen-eral scheme of using an electrostatic accelerator with high efficiency charge recovery was actively discussed in the 1980 s. Recent developments have served to build confidence in this approach, but, by whatever means realized, a Recycler electron cooling system will require significant extension of current practice. The Prospectus incorporates the ideas and understanding current 15 September 1998. Rapid progress toward a comprehensive development plan at this time means that its details will already differ from ideas now current.
Book Synopsis Cooler Rings And Their Applications - Proceedings Of The 19th Ins Symposium by : T Katayama
Download or read book Cooler Rings And Their Applications - Proceedings Of The 19th Ins Symposium written by T Katayama and published by World Scientific. This book was released on 1991-08-29 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents:Status Report:The IUCF Cooler after Three Years (R E Pollock)The Heidelberg Heavy Ion Cooler Ring TSR (E Jaeschke)Storage and Cooling of Heavy Ions in the ESR up to 200 MeV/u (H Eickhoff et al)Present Status of CELSIUS (A Johansson & D Reistad); Cooler Synchrotron TARN II, Present and Future (T Katayama)Beam Cooling: Electron Cooling at TARN II (T Tanabe et al)Ion Trap: Penning Trap Experiments at the University of Washington and at NIST in Boulder (F L Moore) Electron Cooling and Trapped Antiprotons (H Kalinowsky)Nuclear and Particle Physics: High-Resolution Spectroscopy of Deeply-Bound Pionic Atoms in Heavy Nuclei by Pion-Transfer Reactions of Inverse Kinematics Using the GSI Cooler Ring ESR (T Yamazaki)Nuclear Physics with the Indiana Cooler (H O Meyer)The Anomalous Magnetic Moment of the Muon (V W Hughes)Particle Physics at CELSIUS (S Kullander et al)Accelerator: Advanced Stacking Methods Using Electron Cooling at the TSR Heidelberg (M Grieser et al)Accumulation of Radioactive Beam and Collision with Electron Beam in TARN II (A Ando & T Katayama)Internal Target: Internal Targets at the CELSIUS Storage Ring (C Ekström)A Thin Foil as an Internal Target for a Cooler Ring Experiment (K Noda et al)Atomic Physics: Radiative and Dielectronic Recombination: Measurements at UNILAC and ESR (A Müller et al)Electron-Ion Recombination Measurements with an Electron Cooler (L H Andersen)and other papers Readership: Atomic, nuclear and high energy physicists. keywords:
Book Synopsis Progress Toward High Energy Electron Cooling by :
Download or read book Progress Toward High Energy Electron Cooling written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: All electron cooling systems in operation to date can be classified as low energy systems. The electron beam kinetic energy in such a system is limited to about 0.6-1 MeV by the use of a conventional commercial Cockcroft-Walton high-voltage power supply. This, in turn, bounds the maximum ion kinetic energy, accessible for cooling with today's standard technology, to about 2 GeV/nucleon (about a factor of 2-3 times higher than the electron systems in operation today). Electron cooling systems with kinetic energies above 1 MeV could provide economically justifiable improvements in the performance of many existing and proposed accelerator complexes, such as RHIC, Tevatron and HERA. This paper reviews the status of the development of the technology needed for high energy electron cooling.
Book Synopsis Lepton and Photon Interactions at High Energies by : Richard Brenner
Download or read book Lepton and Photon Interactions at High Energies written by Richard Brenner and published by World Scientific. This book was released on 2006 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Lepton-Photon symposiums ? as represented by the contributions in this volume ? are among the most popular conferences in high energy physics since they give an in-depth snapshots of the status of the field as provided by leading experts.The volume covers the latest results on flavor factories, quantum chromodynamics (QCD), electroweak physics, dark matter searches, neutrino physics and cosmology, from a phenomenological point of view. It also offers a glimpse of the immediate future of the field through summaries on the status of the next generation of high energy accelerators and planned facilities for astroparticle physics.The review nature of the articles makes the volume particularly useful to students, as well as being of interest to established researches in high-energy physics and related fields.
Download or read book Electron Cooling at Fermilab written by and published by . This book was released on 1976 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stability of Electron Energy in the Fermilab Electron Cooler by :
Download or read book Stability of Electron Energy in the Fermilab Electron Cooler written by and published by . This book was released on 2009 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: A powerful electron beam (4.3 MeV, 0.1 A DC) generated by an electrostatic accelerator has been used at Fermilab for three years to cool antiprotons in the Recycler ring. For electron cooling to be effective, the electron energy should not deviate from its optimum value by more than 500V. The main tool for studying the energy stability is the electron beam position in a high-dispersion area. The energy ripple (frequencies above 0.2 Hz) was found to be less than 150 eV rms; the main cause of the ripple is the fluctuations of the chain current. In addition, the energy can drift to up to several keV that is traced to two main sources. One of them is a drift of the charging current, and another is a temperature dependence of generating voltmeter readings. The paper describes the efforts to reach the required level of stability as well as the setup, diagnostics, results of measurements, and operational experience.
Download or read book High-Engery Electron Cooling written by and published by . This book was released on 1978 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electron Cooling Achieved written by and published by . This book was released on 1980 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis THE ERL HIGH-ENERGY COOLER FOR RHIC. by : I. BEN-ZVI
Download or read book THE ERL HIGH-ENERGY COOLER FOR RHIC. written by I. BEN-ZVI and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron cooling [1] entered a new era with the July 2005 cooling of the Tevatron recycler ring [2] at Fermilab, using {gamma} = 9.5. Considering that the cooling rate decreases as faster than {gamma}{sup 2} and the electron energy forces higher electron currents, new acceleration techniques, high-energy electron cooling presents special challenges to the accelerator scientists and engineers. For example, electron cooling of RHIC at collisions requires electron beam energy up to about 54 MeV at an average current of between 50 to 100 mA and a particularly bright electron beam. The accelerator chosen to generate this electron beam is a superconducting Energy Recovery Linac (ERL) with a superconducting RF gun with a laser-photocathode.
Book Synopsis Fermilab R & D Program in Medium Energyelectron Cooling by :
Download or read book Fermilab R & D Program in Medium Energyelectron Cooling written by and published by . This book was released on 1996 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fermilab began an R & D program in medium energy electron cooling in April 1995 with the object of cooling 8 GeV antiprotons in a new 3.3 km permanent magnet storage ring (Recycler) to be built in the same tunnel as the Main Injector (MI). The MI is to be completed in 1998, and it is planned to install the Recycler by the end of 1997 to reduce interference during the final rush of MI installation. Although the Recycler will employ stochastic cooling initially, its potential for contributing an order of magnitude to Tevatron collider luminosity is tied to electron cooling. The short time scale and Fermilab's limited familiarity with low energy electron beams has given rise to a two-phase development plan. The first phase is to build a cooling system based on an electron beam of ≥ 200 mA before year 2000. The second phase of about 3 years is planned to reach electron current of 2 A or more. This report describes the general scheme for high luminosity collider operation as well as the R & D plan and progress to date. 17 refs., 5 figs., 1 tab.
