Speakers
Mr
Massamba Diop
(Synchrotron SOLEIL)Mr
Michel Luong
(CEA Saclay)
Description
An analysis of beam stability in the SOLEIL synchrotron with two different basic
systems (direct and amplitude/phase feedback) was carried out during the preliminary
design phase in 1999. Since then, on the one hand, the beam energy was pushed from
2.5 GeV to 2.75 GeV, which led to a change of several other machine parameters such
as the harmonic number, accelerating voltage, relative beam loading factor and
external coupling factor; on the other hand, an analog LLRF system combining one
fast
direct feedback and one slow amplitude/phase feedback was approved for the machine
commissioning. Therefore, a new simulation for the optimization of the LLRF system
parameters appeared necessary. It additionally takes into account different features
(loop delays, bandwidth limitation, extra power budget, possible implementation of a
comb-filter, etc.), which were ignored in the preliminary analysis. A comparison
with
a fast digital I/Q LLRF system, currently under development, is also presented with
a
Matlab and Simulink based simulation tool, which is more versatile than the formerly
used Fortran based code.
Authors
Mr
Massamba Diop
(Synchrotron SOLEIL)
Mr
Michel Luong
(CEA Saclay)
Co-authors
Mr
Fernand RIBEIRO
(Synchrotron SOLEIL)
Mr
Olivier PIQUET
(CEA Saclay)
Mr
Patrick MARCHAND
(Synchrotron SOLEIL)
Mr
Rajesh SREEDHARAN
(Synchrotron SOLEIL)
