Paper |
Title |
Page |
MOP166 |
Comissioning of a BPM system for the LNLS Booster to Storage Ring Transfer Line |
405 |
|
- F.H. Cardoso, S.R. Marques, X.R. Resende
LNLS, Campinas, Brazil
|
|
|
In order to increase the number of diagnostics and make possible studies of beam position effects in the injection efficiency, a beam position monitoring system was designed to equip the BTS (booster to storage ring) transfer line employing the long striplines BPMs. The log-ratio technique was applied using a commercial electronics module (LR-BPM) from Bergoz Instrumentation. Currently the system is integrated to the LNLS control system, database and ready to be used routinely during the injections. This work describes the system topology, details about the hardware and software, bench tests and measurements performed with electron beam. Future plans to improve the injection efficiency will also be presented.
|
|
|
MOP263 |
Fast Orbit Feedback System for the LNLS Storage Ring |
597 |
|
- L. Sanfelici, F.H. Cardoso, D.D. Felix Ferreira, S.R. Marques, D.O. Tavares
LNLS, Campinas, Brazil
|
|
|
The Brazilian Synchrotron Light Laboratory (LNLS) is based on a 1.37 GeV storage ring, previously operated by means of a Slow Orbit Feedback System at a maximum rate of 1 correction every 3 seconds. Since photon flux stability is a key issue for light source users, a faster control system was envisaged to provide better beam stability. This work presents an overview of the hardware architecture and the preliminary results achieved with the implementation of a Fast Orbit Feedback System using commercial hardware. BPM signals are acquired in a distributed topology and sent through a deterministic EtherCAT network to a PXI controller, responsible for applying the SVD-based correction matrix multiplication and communicating with the accelerator control system; the calculated current setpoints are sent to the correctors’ power supplies through a second EtherCAT network. FPGA-based acquisition and actuation chassis perform pre-filtering and control on the digitized input and output signals, respectively.
|
|
|
WEODN3 |
Performance Optimization for the LNLS Fast Orbit Feedback System |
1485 |
|
- D.O. Tavares, S.R. Marques
LNLS, Campinas, Brazil
|
|
|
The Brazilian Synchrotron Light Laboratory (LNLS) has recently commissioned a Fast Orbit Feedback System for its 1.37 GeV third-generation UVX Storage Ring. This paper presents the optimization work which was carried out using the new hardware capabilities. Well known strategies such as singular values conditioning for correction matrix, dynamic control by means of PID or IMC controllers and EVC (Eigenvector constrained) method for minimizing position error in source points were explored. The problem of actuator limitations (saturation and slew rate) was also investigated, providing a new front line for improving orbit stability through feedback.
|
|
|
Slides WEODN3 [1.114 MB]
|
|
|