Abstracts Brochure - CERN

WEPCH005
WEPCH006
WEPCH007
28-Jun-06 16:00 - 18:00 WEPCH — Poster Session
The VUV beamline for the undulator is very demanding with respect to orbit stability and other beam parameters.
Considerable reduction of the vertical emittance via reduction of the transverse coupling is a must in order for the
undulator beamline to achieve its promised outstanding performance. In this paper we report on recent efforts to
better understand the residual coupling in the machine and we describe preliminary proposals of viable solutions
that aim at controlling the linear coupling within beamline specifications.
Beam Orbit Stability at the LNLS Storage Ring
L. Liu, M.J. Ferreira, S.R. Marques, R.T. Neuenschwander, P.F.
Tavares (LNLS)
274
We describe recent efforts made at the Brazilian
Synchrotron Light Source (LNLS) to improve
beam orbit stability. Recent improvements
include the addition of X-ray beam
position monitors to the slow vertical orbit feedback, implementation of mechanical gauges to measure BPM shifts
and deformation due to temperature variation induced by radiation, and a new orbit correction method to allow for
local horizontal orbit correction at specified locations while maintaining the global correction. In addition, the monitors
have been aligned using beam based alignment methods and the BPM electronics and control board installations
were revised and modified. These upgrades are part of an ongoing work to improve beam orbit stability at LNLS.
Simulation Aspects of the Code Benchmarking Based on the ELSA Electron Linear Accelerator
Final Focusing Experiment
J.-L. Lemaire, P. Balleyguier, A.B. Binet, A.B. Bloquet, D.D. Deslandes,
D. Guilhem, V. Le Flanchec, M.M. Millerioux, N. Pichoff, G.V.
Vallard (CEA)
Dedicated focal spot size measurements carried
out at the ELSA electron linear accelerator
facility have provided detailed data
which are suitable for benchmarking of
different simulation codes for high charge
bunch beam acceleration issued from an RF photo-injector source. We present some characteristic features of bunched
electron beam propagation from beam formation at the photo-cathode to acceleration through RF cavities until the
final focussing on a target, by using numerical simulations obtained with MAGIC, PARMELA, MAFIA, PARTRAN
tool box codes. The challenges for the planned benchmarking are discussed.
Beam Dynamics Studies for the Spiral-2 Project
The SPIRAL-2 superconducting linac dri-
P. Bertrand (GANIL) J.-L. Biarrotte (IPN) D. Uriot (CEA)
ver, which aims to deliver 5 mA, 20 A.MeV
deuterons and 1 mA, 14.5 A.MeV q/A=1/3
heavy ions, is now entering the construction phase. It is composed of an injector composed of two ECR sources
entering a 88 MHz RFQ, followed by a superconducting section based on independently phased quarter-wave cavities
with warm focusing. This paper presents the status of the beam dynamics studies recently performed during this
construction phase: consolidation and freezing of the linac design, update of the mass separation system or analysis
of the proton capability.