Abstracts Brochure - CERN

WEPLS — Poster Session 28-Jun-06 16:00 - 18:00
for the strongest SIS100 operating cycle at 4.5 K are expected to be about 13 W/m and 17 W/m in the full length
prototype dipole and quadrupole magnets respectively.
Analysis of the Superferric Quadrupole Magnet Design for the SIS100 Accelerator of the
FAIR Project
The heavy ion fast-cycling synchrotron
SIS100 is the "workhorse", of the future Facility
for Antiproton and Ion Research FAIR
at GSI in Darmstadt. The main lattice parameters
of the accelerator are defined now so
E. Fischer, G. Moritz (GSI) A.K. Kalimov (St. Petersburg State Polytechnic
University) H.G. Khodzhibagiyan, A.D. Kovalenko (JINR)
R.V. Kurnyshov (IHEP Protvino)
the main engineering problems of the new superferric magnets should be analyzed and solved too. We present the
results of finite element calculations and compare them with the experimental data from investigation of the model
magnets to characterize the expected AC loss properties of the full length prototype quadrupole. We discuss the
appropriate new coil structure aimed at minimizing the heat releases at 4.5 K, but providing the requested long-term
mechanical stability against dynamic Lorentz forces and thermal cooling cycles as well.
Computer Modeling of Magnetic System for C400 Superconducting Cyclotron
The superconducting cyclotron (C400) is designed
at IBA (Belgium) able to accelerate
carbon ions at 400 MeV/nucleon. By computer
simulation with 3D TOSCA code, the
Y. Jongen, D. Vandeplassche, S.E. Zaremba (IBA) G.A. Karamysheva,
N.A. Morozov, E. Samsonov (JINR)
cyclotron magnetic system principal parameters were estimated (pole radius 187 cm, outer diameter 606 cm, valley
depth 60 cm, height 276 cm). The required isochronous magnetic field was shaped with an accuracy of ± 2 mT.
Four-fold symmetry and spiralized sectors with elliptical gap (minimal 12 mm at extraction) provide the stable beam
acceleration till 15 mm from the pole edge.
3D Field Computation for the Main Prototype Magnets of the SIS100 Accelerator of the
FAIR Project at GSI
Fast cycling superferric magnets are planned
for use in the new international accelerator
Facility for Antiprotons and Ion Research
(FAIR) at GSI, Darmstadt. The dipoles and
P.A. Shcherbakov (IHEP Protvino) E. Fischer, G. Moritz (GSI) R.V.
Kurnyshov (Electroplant)
quadrupoles have to provide the required field quality from the injection field of 0.25T and 4.3T/m up to the maximum
values of 2.1T and 35T/m respectively. The complex 3D magnetic field distribution due to the longitudinal
component Bz near the yoke end regions and the presence of eddy currents also in the bulk construction elements
as well as in a mechanical stable beam pipe design can create unacceptable static and dynamic nonlinearities. The
detailed knowledge of these effects is necessary to control the field quality for all operating cycles to be provided by
the SIS100 accelerator. We discuss the methodical problems of 3D finite element calculations (ANSYS) of the local and
the integral nonlinearities, considering also the problems caused by the various nonlinear and anisotropic material
properties and by the structure elements of the yoke and beam pipe. The calculated integral static and the affected
by eddy currents harmonic coefficients are presented.
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WEPLS091
WEPLS092
WEPLS093