Abstracts Brochure - CERN

WEPLS088
WEPLS089
WEPLS090
28-Jun-06 16:00 - 18:00 WEPLS — Poster Session
CR and the SuperFRS will be equipped with large-scale superferric magnets, while in the storage ring HESR RHICtype
magnets are foreseen. The status of the R&D activities will be presented.
Progress on the MICE Absorber Focus Coil Module and its 4 K Cooling System
M.A. Green (LBNL) S. Ishimoto (KEK) W. Lau, S.Q. Yang (OX-
FORDphysics)
358
This report describes the progress that has
been made on the absorber focus coil (AFC)
module for the Muon Ionization Cooling Experiment
(MICE) in last year. The AFC mod-
ule consists of an absorber that is used to cool the muons and a superconducting magnet that is around the absorber
to focus the muon beam to a low enough emittance for effective ionization cooling. This report also describes the
placement piping arrangement of the three 4.2 K pulse tube coolers that are used to cool the superconducting magnet
and the liquid absorber (a solid absorber doesn’t require cooling). The performance of the 1.5 W pulse tube cooler
and its effect on the magnet and absorber temperature is discussed.
Feasibility Study of a Permanent Magnet Made from High-Tc Bulk Superconductor
A field trapping experiment using a mag-
M. Masuzawa, K. Egawa, K. Tsuchiya (KEK)
netic field up to ∼1.5 T was performed using
high-Tc bulk superconductors. Applications
of bulk high-Tc superconductors have been investigated in various fields. High-Tc superconductors are attractive
since they can trap higher magnetic fields than conventional permanent magnets. The trapping experiment was done
with a field of above 1 T, which can be easily produced by conventional magnets. However, achieving the desired
field distribution and understanding the characteristics of the trapped field and its decay process would open up
the possibility of high-Tc bulk superconductor applications in the design of magnets for particle accelerators The
distribution of the trapped field and its decay process was monitored by an array of Hall sensors for different shapes
of the bulk superconductors. The observations are reported on in this paper.
Full Length Superferric Dipole and Quadrupole Prototype Magnets for the SIS100 at GSI:
Status of the Design and Manufacturing
A.D. Kovalenko, N.N. Agapov, P.G. Akishin, H.G. Khodzhibagiyan,
G.L. Kuznetsov, V.V. Seleznev, A. Smirnov, A.Y. Starikov (JINR) E.
Fischer, G. Moritz, C. Muehle, P.J. Spiller (GSI) A.K. Kalimov (St.
Petersburg State Polytechnic University)
The SIS100, one of the two basic accelerators
of the future Facility for Antiproton and Ion
Research FAIR at GSI, should provide acceleration
of U 28+ and proton beams for 0.5 s
with a pulse repetition rate of 1 Hz. In the
accelerator magnetic system superferric 2 T
dipoles of about 3 m length and 35 T/m quadrupoles of about 1 m length will be used. The magnet coils are made
from hollow NbTi composite cable cooled with two-phase helium flow at 4.5 K. The maximum operating current of
7500 A is supposed. The lattice comprises 108 dipoles and 168 quadrupoles. The elliptic beam pipe inner sizes have
been fixed to 130x60 mm2 for the dipole and 135x65 mm2 for the quadrupole The design approach is based on the
improved versions of the Nuclotron fast-cycling magnets that provide significant less AC loss at 4.5 K, better quality
of the magnetic field and a higher long-term mechanical stability of the magnet coils. The AC losses in the magnets