Abstracts Brochure - CERN

WEPLS — Poster Session 28-Jun-06 16:00 - 18:00
major improvements. An overview is given of the production of the new components, the actual refurbishment and
the commissioning of the main magnet system after 18 months shut down.
AC Field Measurements of Fermilab Booster Correctors Using a Rotating Coil System
The first prototype of a new corrector package
for the Fermilab Booster Synchrotron is
presently in production. This water-cooled
package includes normal and skew dipole,
quadrupole and sextupole magnets to con-
G. Velev, J. DiMarco, D.J. Harding, V.S. Kashikhin, M.J. Lamm,
D.F. Orris, P. Schlabach, C. Sylvester, M. Tartaglia, J. Tompkins
(Fermilab)
trol orbit, tune and chromaticity of the beam over the full range of Booster energies (400 MeV-8 GeV). These correctors
must make rapid excursions from the 15 Hz excitation cycle of the main synchrotron magnets, in some cases even
switching polarity in approximately 1 ms at transition crossing. To measure the dynamic changes in the field during
operation, a new method based on a relatively slow rotating coil system is proposed. The method pieces together the
measured flux from successive current cycles to reconstruct the field harmonics. This paper describes the method
and presents initial field quality measurements from the corrector prototype.
Study of RF Breakdown in Normal Conducting Structures with Various Geometries and
Materials
RF breakdown is one of the major factors determining
performance of high power rf com- V.A. Dolgashev, S.G. Tantawi (SLAC)
ponents, rf sources and accelerating structures.
We study the breakdown in 11 GHz high gradient waveguides at rf powers reaching 300 MW. We tested
rectangular waveguides of two geometries which have increased surface electric and magnetic fields in comparison
with a standard WR90 waveguide. We used copper, gold, molybdenum, and stainless steel as material for the waveguides.
We observe rf parameters, X-rays and visible light from breakdown events. We report the results of the
conditioning of these waveguides and compare these results.
A 15T Pulsed Solenoid for a High-power Target Experiment
We describe the 15T, 15cm by 1m bore pulsed
solenoid designed to serve the proof-of-prin- H.G. Kirk (BNL) K.T. McDonald (PU) P. Titus (MIT/PSFC)
ciple high-power target experiment scheduled
to run at CERN in the spring of 2007. Design criteria as well as operational performance are discussed.
Status of the Development of the FAIR Superconducting Magnets
For the planned ’Facility for Antiprotons and
Ion Research’ (FAIR), a variety of supercon- G. Moritz, E. Fischer, J. Kaugerts, H. Leibrock, C. Muehle (GSI)
ducting magnets is foreseen. The synchrotrons
SIS 100 and SIS 300 will use fast-pulsed superferric and superconducting cos (theta) magnets. The storage ring
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