Abstracts Brochure - CERN

MOPCH083
MOPCH084
MOPCH085
26-Jun-06 16:00 - 18:00 MOPCH — Poster Session
chain and the expected particle numbers. An overview of the novel beam handling, cooling and imaging techniques
as they will be required across the facility is given.
Design Study for an Antiproton Polarizer Ring APR
A. Garishvili, A. Lehrach, B. Lorentz, S.A. Martin, F. Rathmann
(FZJ) P. Lenisa (INFN-Ferrara) E. Steffens (Erlangen University)
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In the framework of the FAIR* project, the
PAX collaboration has suggested a new experiments
using polarized antiprotons**, in
particular the study of the transverse spin
structure of the proton. To polarize antiprotons the spin filtering method is proposed. The PAX collaboration is going
to design the Antiproton Polarizer Ring (APR). In this contribution the design of this storage ring is described. The
basic parameters of the APR are antiproton beam energy of 250 MeV and emittance in both planes of 250 pi mm
mrad. The APR consists of two 180 degree arcs and two straight sections. One straight section houses the injection/
extraction and the polarized internal target cell, in the other straight section, the electron cooler and a Siberian snake
are located. Different optical conditions have to be fulfilled in the straight sections: (1) The target cell requires a beta
function of less than 0.3 m. (2) The beam has to be circular and upright in the phase space ellipse at the target, the
electron cooler, and the snake. (3) The antiproton beam should have a size of 10 mm for an emittance of 250 pi mm
mrad. (4) The momentum dispersion has to be zero in both straight sections.
*Conceptual Design Report for an International Accelerator Facility for Research with Ions and Antiprotons, available
from www.gsi.de/GSI-Future/cdr.**PAX Technical Proposal, available from www.fz-juelich.de/IKP/pax.
From COSY to HESR
D. Prasuhn, J. Dietrich, A. Lehrach, B. Lorentz, R. Maier, H. Stockhorst
(FZJ)
The High Energy Storage Ring (HESR) at the
proposed Facility for Antiproton and Ion Research
(FAIR) puts strong demands on quality
and intensity of the stored antiproton
beam in the presence of thick internal targets. The existing synchrotron and storage ring COSY in Juelich can
be seen as a smaller model of the HESR. In this paper we will discuss possible benchmarking experiments at COSY,
involving effects like beam cooling, target heating, intra-beam scattering, etc. The aim of these experiments is to
support the design work for the HESR and ensure that the specified beam conditions can be achieved.
Pickup Structures for the HESR Stochastic Cooling System
The design of the High-Energy Storage Ring
R. Stassen, P.B. Brittner, G. Schug, H.S. Singer (FZJ)
(HESR) of the future International Facility for
Antiproton and Ion Research (FAIR) at the
GSI in Darmstadt includes electron and stochastic cooling. Simulations have shown that the bandwidth of a 2-4 GHz
stochastic cooling system is sufficient to achieve the requested beam parameter at the internal target. New 2-4 GHz
pickup structures have been developed and tested. First results of the low impedance, printed loop structures will be
presented.