Abstracts Brochure - CERN

WEPLS — Poster Session 28-Jun-06 16:00 - 18:00
Magnetic Measurements of the BEPCII Sextupole Magnets
The new BEPCII double ring includes 72 sextupole
magnets. These sextupole magnets J.-D. Zhang (SINAP)
operate at a strength of up to 240 T/m2 and
have an effective length of 0.17 m. A prototype sextupole magnet has been designed, constructed, and measured by
SINAP in September, 2004. The design approaches very closely to 120-degree rotation symmetry, in order to minimize
all forbidden multipole components. The core is made of three identical stacks of laminations, each lamination
consisting of two poles and the return yoke joining them. Total sextupole magnets as well have been completed at
SINAP successfully by the end of September, 2005. The development of the measurement systems as well as the
magnetic measurements results of the BEPCII Sextupole Magnets are described in this paper.
Considerations on the Design of the Bending Magnet for Beam Extraction System of PEFP
The PEFP is designed to have two beam extraction
lines at the 20 MeV end and 100MeV Y.-H. Kim, Y.-S. Cho, J.-H. Jang (KAERI)
end for beam utilization. So, the bending
magnet to extract the beam from the beam line is located among the MEBT. This implies that there is a long drift space
between the focusing structures, while, from the beam dynamics study, it is recommended to make the drift space
shorter. In this study, we design and compare some bending magnets to satisfy the beam dynamics requirements.
Design Study of the 30 MeV Cyclotron Magnet
KIRAMS has been developing a 30 MeV cyclotron
that is planned to be installed at
Advanced Radiation Technology Institute,
Jeongeup in late 2006. The AVF (Azimuthally
J. Kang, D.H. An, J.-S. Chai, H.S. Chang, H.B. Hong, S.S. Hong, M.G.
Hur, I.S. Jung, J.H. Kim, Y.-S. Kim, M.Y. Lee, T.K. Yang (KIRAMS)
Varing Field) magnet of the cyclotron was designed to produce 15–30 MeV proton beam with movable stripper foil.
Four direction extractions are available with two switching magnets. The overall shape of the magnet is cylindrical.
The magnet has three kinds of holes for injection, pump, and RF system. The valley and hill gap ratio is about 20 for
higher axial focusing. This paper presented the designed model and its magnetic properties.
The Compensation of the Influence of the Extraction Magnetic Channel on DC60 Cyclotron
Magnetic Field
In the system of the extraction of accelerated
ions from DC60 cyclotron the magnetic channel
is applied. The magnetic channel modify
(lower) the radial distribution of the mean
I.A. Ivanenko, J. Keniz (JINR) V.P. Kukhtin, E.A. Lamzin, S.E.
Sytchevsky (NIIEFA)
magnetic field and produces the first harmonic with amplitude up to 50Gs. To compensate the magnetic channel
influence the sector side shims are used. The results of 3D calculations of compensation method and measurements
are presented.
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