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Title: Antiproton - Ion Collider for FAIR Project

Abstract

An antiproton-ion collider (AIC), with extensive using of electron cooling, is proposed to determine rms radii for protons and neutrons in unstable and short lived nuclei by means of antiproton absorption at medium energies. The experiment makes use of the electron-ion collider complex with appropriate modifications of the electron ring to store, cool and collide antiprotons of 30 MeV energy with 740 MeV/unit ions in the NESR. Antiprotons are collected, cooled, decelerated up to 30 MeV and transferred to the electron storage ring. The radioactive nuclei beams are transferred to the CR and cooled at 740A MeV and transported via the RESR to NESR, in which especially short lived nuclei are accumulated continuously to increase the luminosity. Luminosities of about 1023 cm-2s-1 may be reached with 106 ions accumulated in the NESR in coasting mode of operation, used for Schottky spectroscopy of the fragments.

Authors:
;  [1];  [2];  [3];  [2]; ; ; ; ;  [4];  [5]
  1. GSI, Darmstadt (Germany)
  2. TUM, Munich (Germany)
  3. (Austria)
  4. BINP, Novosibirsk (Russian Federation)
  5. SMI, Vienna (Austria)
Publication Date:
OSTI Identifier:
20798384
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: 10.1063/1.2190099; (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; ACCELERATORS; ANTIPROTON BEAMS; BEAM LUMINOSITY; COLLIDING BEAMS; ELECTRON BEAMS; ELECTRON COOLING; ELECTRON RINGS; ION BEAMS; MEV RANGE; STORAGE RINGS

Citation Formats

Beller, P., Franzke, B., Kienle, P., SMI, Vienna, Kruecken, R., Koop, I., Parkhomchuk, V., Shatunov, Y., Skrinsky, A., Vostrikov, V., and Widmann, E. Antiproton - Ion Collider for FAIR Project. United States: N. p., 2006. Web. doi:10.1063/1.2190099.
Beller, P., Franzke, B., Kienle, P., SMI, Vienna, Kruecken, R., Koop, I., Parkhomchuk, V., Shatunov, Y., Skrinsky, A., Vostrikov, V., & Widmann, E. Antiproton - Ion Collider for FAIR Project. United States. doi:10.1063/1.2190099.
Beller, P., Franzke, B., Kienle, P., SMI, Vienna, Kruecken, R., Koop, I., Parkhomchuk, V., Shatunov, Y., Skrinsky, A., Vostrikov, V., and Widmann, E. Mon . "Antiproton - Ion Collider for FAIR Project". United States. doi:10.1063/1.2190099.
@article{osti_20798384,
title = {Antiproton - Ion Collider for FAIR Project},
author = {Beller, P. and Franzke, B. and Kienle, P. and SMI, Vienna and Kruecken, R. and Koop, I. and Parkhomchuk, V. and Shatunov, Y. and Skrinsky, A. and Vostrikov, V. and Widmann, E.},
abstractNote = {An antiproton-ion collider (AIC), with extensive using of electron cooling, is proposed to determine rms radii for protons and neutrons in unstable and short lived nuclei by means of antiproton absorption at medium energies. The experiment makes use of the electron-ion collider complex with appropriate modifications of the electron ring to store, cool and collide antiprotons of 30 MeV energy with 740 MeV/unit ions in the NESR. Antiprotons are collected, cooled, decelerated up to 30 MeV and transferred to the electron storage ring. The radioactive nuclei beams are transferred to the CR and cooled at 740A MeV and transported via the RESR to NESR, in which especially short lived nuclei are accumulated continuously to increase the luminosity. Luminosities of about 1023 cm-2s-1 may be reached with 106 ions accumulated in the NESR in coasting mode of operation, used for Schottky spectroscopy of the fragments.},
doi = {10.1063/1.2190099},
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}
}
  • For the FAIR Project at Darmstadt an antiproton-ion collider has been proposed to independently determine rms radii for protons and neutrons in stable and short lived nuclei by means of antiproton absorption at medium energies. The experiment makes use of the electron ion collider complex to store, cool and collide antiprotons of 30 MeV energy with short lived radioactive ions in the NESR that are produced by projectile fragmentation and projectile fission separated in the Super FRS. The total absorption cross-section for antiprotons on the stored ions with mass A will be measured by detecting the loss of stored ionsmore » by means of the Schottky method. Cross sections for the absorption on protons and neutrons, respectively, will be measured by the detection of residual nuclei with A-1 either by the Schottky method or by detecting them in recoil detectors after the first dipole stage of the NESR following the interaction zone. Theoretical calculations show that the absorption cross sections are in first order directly proportional to the mean square radii.« less
  • An antiproton-ion collider (AIC) has been proposed for the FAIR Project at Darmstadt to independently determine rms radii for protons and neutrons in stable and short lived nuclei by means of antiproton annihilation at medium energies. The AIC makes use of the ELISe electron ion collider complex to store, cool and collide antiprotons of 30 MeV energy with short lived radioactive ions in the NESR. The exotic nuclei are produced by projectile fragmentation or projectile fission and separated in the Super FRS. By detecting the loss of stored ions using the Schottky method the total absorption cross-section for antiprotons onmore » the stored ions with mass A will be measured. Cross sections for the absorption on protons and neutrons, respectively, will be measured by the detection of residual nuclei with A-1 either by the Schottky method or by detecting them in recoil detectors after the first dipole stage of the NESR following the interaction zone. The absorption cross sections are in first order directly proportional to the mean square radii.« less
  • FAIR is a new large-scale particle accelerator facility to be built at the GSI site in Germany. The research pursued at FAIR will cover a wide range of topics in nuclear and hadron physics, as well as high density plasma physics, atomic and antimatter physics, and applications in condensed matter physics and biology. The working horse of FAIR will be a 1.1km circumference double ring of rapidly cycling 100 and 300Tm synchrotrons, which will be used to produce high intensity secondary beams of short-lived radioactive ions or antiprotons. A subsequent suite of cooler and storage rings will deliver heavy ionmore » and antiproton beams of unprecedented quality. Large experimental facilities are presently being designed by the NUSTAR, PANDA, PAX, CBM, SPARC, FLAIR, HEDgeHOB and BIOMAT collaborations.« less
  • Two microscopic models, ultrarelativistic quantum molecular dynamics and quark-gluon string model, were employed to study the formation of locally equilibrated hot and dense nuclear matter in heavy-ion collisions at energies from 11.6A to 160A GeV. Analysis was performed for the fixed central cubic cell of volume V=125 fm{sup 3} and for the expanding cell that followed the growth of the central area with uniformly distributed energy. To decide whether the equilibrium was reached, results of the microscopic calculations were compared to that of the statistical thermal model. Both dynamical models indicate that the state of kinetic, thermal and chemical equilibriummore » is nearly approached at any bombarding energy after a certain relaxation period. The higher the energy, the shorter the relaxation time. Equation of state has a simple linear dependence P=a({radical}(s)){epsilon}, where a{identical_to}c{sub s}{sup 2} is the sound velocity squared. It varies from 0.12{+-}0.01 at E{sub lab}=11.6A GeV to 0.145{+-}0.005 at E{sub lab}=160A GeV. Change of the slope in a({radical}(s)) behavior occurs at E{sub lab}=40A GeV and can be assigned to the transition from baryon-rich to meson-dominated matter. The phase diagrams in the T-{mu}{sub B} plane show the presence of kinks along the lines of constant entropy per baryon. These kinks are linked to the inelastic (i.e., chemical) freeze-out in the system.« less
  • The status of FAIR, the planned 'Facility for Antiproton and Ion Research', is presented in this contribution. FAIR will be a world unique particle accelerator facility to be built as a joint project by - as of today - 16 member countries. FAIR, which is planned for construction adjacent to the GSI site in Germany, is an integrated system of particle accelerators, 2 superconducting synchrotrons and 8 storage rings, which will provide high energy and high intensity beams of ions from hydrogen to uranium with unprecedented quality and in full parallel mode. In addition highest luminosity secondary beams of raremore » isotopes and beams of antiprotons will be available. FAIR will combine physics research topics from different communities, i.e. nuclear physics, hadron physics, heavy-ion physics, plasma physics, atomic physics and accelerator development. Details of FAIR and the physics projects will be presented in this contribution.« less