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Title: Cooling Scenario for the HESR Complex

Abstract

The High-Energy Storage Ring (HESR) of the future International Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt is planned as an anti-proton cooler ring in the momentum range from 1.5 to 15 GeV/c. An important and challenging feature of the new facility is the combination of phase space cooled beams with internal targets. The required beam parameters and intensities are prepared in two operation modes: the high luminosity mode with beam intensities up to 1011 anti-protons, and the high resolution mode with 1010 anti-protons cooled down to a relative momentum spread of only a few 10-5. Consequently, powerful phase space cooling is needed, taking advantage of high-energy electron cooling and high-bandwidth stochastic cooling. Both cooling techniques are envisaged here theoretically, including the effect of beam-target interaction and intra-beam scattering to find especially for stochastic cooling the best system parameters.

Authors:
; ; ;  [1]
  1. Forschungszentrum Juelich GmbH, D-52425 Juelich (Germany)
Publication Date:
OSTI Identifier:
20798396
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 821; Journal Issue: 1; Conference: COOL05: International workshop on beam cooling and related topics, Galena, IL (United States), 18-23 Sep 2005; Other Information: DOI: 10.1063/1.2190110; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ANTIPROTON BEAMS; ANTIPROTON SOURCES; ANTIPROTONS; BEAM DYNAMICS; BEAM OPTICS; ELECTRON BEAMS; ELECTRON COOLING; GEV RANGE; PHASE SPACE; SCATTERING; STOCHASTIC COOLING; STORAGE RINGS

Citation Formats

Stockhorst, H., Prasuhn, D., Maier, R., and Lorentz, B. Cooling Scenario for the HESR Complex. United States: N. p., 2006. Web. doi:10.1063/1.2190110.
Stockhorst, H., Prasuhn, D., Maier, R., & Lorentz, B. Cooling Scenario for the HESR Complex. United States. doi:10.1063/1.2190110.
Stockhorst, H., Prasuhn, D., Maier, R., and Lorentz, B. Mon . "Cooling Scenario for the HESR Complex". United States. doi:10.1063/1.2190110.
@article{osti_20798396,
title = {Cooling Scenario for the HESR Complex},
author = {Stockhorst, H. and Prasuhn, D. and Maier, R. and Lorentz, B.},
abstractNote = {The High-Energy Storage Ring (HESR) of the future International Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt is planned as an anti-proton cooler ring in the momentum range from 1.5 to 15 GeV/c. An important and challenging feature of the new facility is the combination of phase space cooled beams with internal targets. The required beam parameters and intensities are prepared in two operation modes: the high luminosity mode with beam intensities up to 1011 anti-protons, and the high resolution mode with 1010 anti-protons cooled down to a relative momentum spread of only a few 10-5. Consequently, powerful phase space cooling is needed, taking advantage of high-energy electron cooling and high-bandwidth stochastic cooling. Both cooling techniques are envisaged here theoretically, including the effect of beam-target interaction and intra-beam scattering to find especially for stochastic cooling the best system parameters.},
doi = {10.1063/1.2190110},
journal = {AIP Conference Proceedings},
number = 1,
volume = 821,
place = {United States},
year = {Mon Mar 20 00:00:00 EST 2006},
month = {Mon Mar 20 00:00:00 EST 2006}
}
  • The maximum electron energy of the HESR electron cooling system has been decided to be 4.5 MeV, with a possible future upgrade to 8 MeV. Calculations with BETACOOL have been carried out; these include effects of imperfections of the electron beam as well as the internal hydrogen pellet target and intra-beam scattering. Design work is going on. This makes use of the experience gained at the FNAL Recycler and aims to result in a practical solution, which includes considerations for robustness as well as ease of assembly, bake-out, and to make use of proven solutions as much as possible.
  • The High-Energy Storage Ring (HESR) of the future International Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt is planned as an anti-proton cooler ring in the momentum range from 1.5 to 15 GeV/c. An important and challenging feature of the new facility is the combination of highly dense phase space cooled beams with internal targets. A detailed numerical and analytical approach to the Fokker-Planck equation for longitudinal filter cooling including the beam-target interaction has been carried out to demonstrate the stochastic cooling capability. To gain confidence in the model predictions a series of experimental stochastic cooling studiesmore » with the internal target ANKE at COSY have been carried out. A remarkable agreement between model and experiment was achieved. On this basis longitudinal stochastic cooling simulations were performed to predict the possibilities and limits of cooling when the newly installed WASA Pellet-target is operated.« less
  • Meson spectroscopy experiments performed using antiproton beams have carried out a deep and systematic study of all the main open problems of strong interaction in the non-perturbative regime. In this review, I will sketch the major achievements obtained by experiments studying antiproton annihilations at the CERN LEAR machine and at the Fermilab antiproton accumulator. Finally I will illustrate which topics might be addressed, in the next future, by the new antiproton machine (HESR) that will be available at GSI.
  • We studied the dynamics of an antiproton beam in the High-Energy Storage Ring (HESR) being designed by a consortium with scientists from FZ Juelich, GSI Darmstadt, and TSL Uppsala for construction as a part of the International Facility for Antiproton and Ion Research (FAIR) at the GSI in Darmstadt. In this paper we present investigations of the effect of longitudinal ring impedance utilizing the tracking code SIMBAD. Comparison between the results of the simulation and the available theoretical prediction is discussed.
  • The High-Energy Storage Ring (HESR) of the future International Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt is planned as an antiproton cooler ring in the momentum range from 1.5 to 15 GeV/c. It has to provide small momentum spread down to 10-5 and intensities up to few times 1011 for internal experiments. To reach these beam parameters very powerful phase space cooling is needed. The effect of beam-target interaction, intra-beam scattering, space charge, and beam-wall interaction induced by ring impedances has to be investigated. Moreover benchmarking of the simulation codes used for design work of themore » HESR with experiments at existing accelerator facilities is of major importance. In this paper the status of the design work for this project is presented.« less