Abstracts Brochure - CERN

WEPCH — Poster Session 28-Jun-06 16:00 - 18:00
WEPCH — Poster Session
Single Beam Dynamics in XFEL Linac
The single bunch emittance preservation in
booster and main linacs of European XFEL
project is presented. The wakefield and chromatic
dilution of the beam emittance caused
B. Grigoryan, G.A. Amatuni, V.M. Tsakanov (CANDLE) R.
Brinkmann, W. Decking (DESY)
by free betatron oscillations, cavity and modules offset misalignments and random tilts are evaluated. The effects
of cavities misalignments correlation along the linac are discussed. The effects of quadrupole misalignments and
the corresponding trajectory steering based on one-to-one correction technique are given. The residual chromatic
emittance dilution of the corrected trajectory is evaluated.
Beam Life Time Dependence on the Vacuum Rate
The dependence of the beam life time period
on the vacuum rate in accelerating camera M.K. Khojoyan (YerPhI)
of Yerevan synchrotron is investigated. The
received results are based on the measurements having been completed when the synchrotron accelerating stations
weren’t been acting (betatron regime). Some analytical considerations of the beam behavior (emittance and other
characteristics) are completed using MATLAB code and are coinciding with the measurements.
Dynamic Aperture Studies and Closed Orbit Correction Schemes for the Australian Synchrotron
In 3rd generation light sources the fabrication,
installation and alignment of magnets
determine the dynamic aperture of the lattice
(DA) and is a good measure of the injection
Y.E. Tan, M.J. Boland, R.T. Dowd, G. LeBlanc, D. Morris, M.J.
Spencer (ASP)
efficiency and lifetime of the stored electron beam. Measurements of the multipole content of the quadrupoles and
sextupoles have been made and are used in this study to determine the effect on the dynamic aperture (DA) using
Frequency Map Analysis (FMA) techniques. Misalignments and closed orbit correction schemes using correctors
built into the sextupoles will also be evaluated. Insertion Devices (IDs) are simulated using kick maps generated from
RADIA.
Transverse Linear Coupling Compensation in the LNLS Storage Ring
The Brazilian Synchrotron Light Laboratory
(LNLS) has recently started filling its storage X.R. Resende, M.D. Cervantes, L. Liu, P.F. Tavares (LNLS)
ring straight sections with insertion devices.
Last year a 2-Tesla Wiggler was successfully installed and integrated in the control system. An elliptically polarizing
undulator is now under construction and scheduled to be installed in the next shutdown, by the end of the current year.
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