Abstracts Brochure - CERN

MOPCH075
MOPCH076
MOPCH077
MOPCH078
26-Jun-06 16:00 - 18:00 MOPCH — Poster Session
Internal Target Effects in the ESR Storage Ring with Cooling
V. Gostishchev, K. Beckert, P. Beller, C. Dimopoulou, A. Dolinskii,
F. Nolden, M. Steck (GSI) I.N. Meshkov, A.O. Sidorin, A.V. Smirnov,
G.V. Trubnikov (JINR)
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For the planned new storage ring of the FAIR
facility the accurate description of target effects
is important for the prediction of experimental
conditions in terms of high luminosity
and high quality of the beam. This paper
outlines numerical calculations to evaluate the beam dynamics of ions in storage rings, where strong cooling in
combination with thick targets is applied. Important effects due to internal targets and their influence on the beam
parameters have been considered. Experiments at the existing ESR storage ring have been performed in order to
benchmark the codes. Comparison of experimental results and simulations will be given.
Baseline Design for the Facility for Antiproton and Ion Research (FAIR) Finalized
The baseline design for the future interna-
D. Krämer (GSI)
tional facility FAIR has been worked out. The
unique accelerator complex will provide high
intensity ion beams ranging from antiprotons to uranium for nuclear matter and hadron physics studies. Radioactive
beams are generated for nuclear structure and astrophysics experiments. Phase space compression utilizing stochastic
and electron cooling allow for fundamental tests at highest precision. Centered around two fast ramping superconducting
synchrotrons, ions are accelerated to a beam rigidity of up to 100 Tm and 300 Tm, respectively. Two dedicated
storage rings serve for beam accumulation and cooling, providing unprecedented beam quality for experiments in
the NESR and HESR storage rings. An overview of the layout of the accelerator complex and beam delivery systems
is given. Ongoing R&D activities are reported; project status and international participation will be presented.
Collector Ring CR of the FAIR Project
F. Nolden, K. Beckert, P. Beller, A. Dolinskii, I. Nesmiyan, C.
Peschke, M. Steck (GSI)
The Collector Ring is a storage ring in the
framework of the FAIR project. It has the
purpose of stochastic precooling of both rare
isotope and antiproton beams and of measu-
rung nuclear masses in an isochronous setting. The paper discusses progress in the development of magnet systems,
rf systems, injection/extraction strategies and stochastic cooling systems. Finally it is discussed how to confirm the
predicted performance of the slotline electrodes developed recently for stochastic cooling.
Simulation of Dynamic Vacuum Induced Beam Loss
In synchrotrons, operated with intermedi-
C. Omet, P.J. Spiller, J. Stadlmann (GSI)
ate charge state, heavy ion beams, intensity
dependent beam losses have been observed.
The origin of these losses is the change in charge state of the beam ions at collisions with residual gas atoms or
molecules. The resulting A/Z deviation from the reference beam ion leads to modified trajectories in dispersive elements,
which finally results in beam loss. At the impact positions, secondary particles are produced by ion stimulated
desorption and increase the vacuum pressure locally. In turn, this pressure rise will enhance the charge change − and