Abstracts Brochure - CERN

MOPCH — Poster Session 26-Jun-06 16:00 - 18:00
particle loss process and finally cause significant beam loss within a very short time (a few turns). A program package
has been developed, which links the described beam loss mechanisms to the residual gas status and determines the
vacuum dynamics. Core of the program is an ion optics tracking routine, in which the atomic physics and vacuum
effects are embedded.
Ion Optical Design of the Planned Heavy Ion Synchrotron SIS100
The ion optical design of SIS100, which is the
main synchrotron of the FAIR project, will be
presented. The main purpose of SIS100 is the
acceleration of high intensity heavy ion and
J. Stadlmann, K. Blasche, B. Franczak, C. Omet, N. Pyka, P.J. Spiller
(GSI) A.D. Kovalenko (JINR)
proton beams and the generation of short compressed single bunches for the production of secondary beams. Since
ionization in the residual gas is the main loss mechanism, a new lattice design concept had to be developed, especially
for the operation with intermediate charge state, heavy ions. The lattice was optimized to generate a peaked loss
distribution in charge separator like lattice cells. Thereby it enables the control of generated desorbtion gases in
special catchers. For bunch compression the lattice provides dispersion free straight sections and a low dispersion
in the arcs. A special difficulty is the optical design for fast and slow extraction, and the emergency dumping of the
high rigidity ions that would make it possible to install necessary equipment within one and the same short straight
section.
Design of the NESR Storage Ring for Operation with Ions and Antiprotons
The New Experimental Storage Ring (NESR)
of the FAIR project has two major modes of
operation. These are storage of heavy ion
beams for internal experiments and deceler-
M. Steck, K. Beckert, P. Beller, C. Dimopoulou, A. Dolinskii, F.
Nolden, J. Yang (GSI)
ation of highly charged ions and antiprotons before transfer into a low energy experimental area. The heavy ion
beams can be either stable highly charged ions or rare isotope beams at an energy of 740 MeV/u selected in a magnetic
separator. The antiprotons come with an energy of 3 GeV from the production target, they are pre-cooled and
accumulated in a storage ring complex. The magnetic structure of the NESR has been optimized for large transverse
and longitudinal acceptance by detailed dynamic aperture calculations. This will allow storage of multi-component
beams with a large spread of charge to mass ratio, corresponding to a large spread in magnetic rigidity. Highest phase
space density of the stored beams is provided by an electron cooling system, which for ions covers the full energy
range and for antiprotons allows intermediate cooling during the deceleration process. For experiments with shortlived
isotopes the cooling time and the time of deceleration will be optimized to a few seconds.
FLAIR: a Facility for Low-energy Antiproton and Ion Research
To exploit the unique possibilities that will
become available at the Facility for Antipro- C.P. Welsch, C.P. Welsch (CERN) H. Danared (MSL)
ton and Ion Research (FAIR), a collaboration
of about 50 institutes from 15 countries was formed to efficiently enable an innovative research program towards
low-energy antimatter-physics. In the Facility for Low-energy Antiproton and Ion Research (FLAIR) antiprotons and
heavy ions are slowed down from 30 MeV to energies as low as 20 keV by a magnetic and an electrostatic storage ring.
In this contribution, the facility and the research program covered are described with an emphasis on the accelerator
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