 Booster RF System Progress Report
|
|
Last Update : October 2005
|
|
Booster main parameters
|
| Circumference | 156.6 m | | Revolution frequency | 1.91 MHz | | Repetition rate | 3 Hz | | Injection energy, Ei | 100 MeV | | Final energy, Ef | 2.75 GeV | | Energy loss / turn @ Ef | 410 keV | | Beam current (max) | 12 mA | | RF acceptance @ Ef
@ Ei with Vrf = 200 kV | ± 0.35 %
± 1.5 % | | Harmonic number | 184 | | RF frequency | 352.2 MHz | | RF voltage @ Ef | 0.85 MV | | Beam power @ Ef | 5 kW |
RF SYSTEM
| -> 1CERN-LEP 5-cell Cu cavity, Rs=26 MΩ
Pdis : 15 kW, Pbeam : 5 kW, Ptot : 20 kW
-> 1 solid state amplifier, Pavailable : 35 kW |
|
|
Booster 5-cell Cu cavity (CERN-LEP type)
|
|
|
|
Booster 35 kW Solid state amplifier
|
| |  | | 147 amplifier modules & DC/DC converters on 8 water-cooled dissipators |
|
|
Booster amplifier power combination
|
|
|
|
Diagram of the Booster RF control system
|
|
|
|
Booster Low Level RF Electronics
|
|
| |  | | 3 boucles de contrôle "lent" conventionnelles pour la fréquence, l'amplitude et la phase, conception du LURE adaptée au besoin de SOLEIL |
| Amplitude | Phase | Fréquence | | Précision | ± 0.25 % | ± 0.4° | ± 30 Hz | | 3 dB BW | 12 kHz | 7 kHz | 5 Hz |
|
|
Booster RF power plant: Review of test results and status
|
Spring 2004: 1st day of operation, amplifier tested up to 35 kw CW on dummy load and then 30 kW for
~ 600 hours without any interruption
June 2004: Cavity RF conditioning up to 30 kW CW (1.5 x Vmax, 3 x <P>)
Several "full reflection" events occured during the conditioning process
-> normal switch-off without trouble for the amplifier
Summer 2004: Implementation of the control (µcontroller + PLC) and LLRF
(drive chain, amplitude, phase and tuning loops)
Autumn 2004: Tests of the complete Booster RF plant (cavity, amplifier, control & LLRF) at 30 kW CW
for more than 1500 h without major trouble nor performance degradation; only a few
minor faults due to cabling mistakes that could be quickly repaired
-> The fault events did not stop neither perturb the amplifier operation
December 2004: Tests with 33 % Preflected (10 over 30kW) in CW for a few days
July 2005: Complete Booster RF plant installed, tested and operational on site
|
|
Booster amplifier and cavity inside the test area at LURE
|
|
|
|
Transfert de la cavité dans l'anneau du Booster
|
|
|
|
Cavity accomodated in the Booster ring
|
|
|
|
Booster RF room
|
|
|
 |
