The SLS Fast Orbit Feedback (FOFB) was successfully commissioned in 2003 [1]. Since November 2003 it runs during user operation of the SLS. Taking into account 72 Digital Beam Position Monitors (DBPMs), the FOFB applies SVD-based global orbit corrections for 72 horizontal (x) and 72 vertical (y) correctors at a rate of 4 kHz, compared to 0.5 Hz for the Slow Orbit Feedback (SOFB) that was used so far. While the SOFB was important for the elimination of orbit drifts due to temperature changes and slowly moving insertion device (ID) gaps, the FOFB is also able to damp orbit oscillations that are caused by fast changes of ID gaps or magnets, by ground and girder vibrations, 3 Hz booster crosstalk and power supply noise. This report presents experience from commissioning and user operation of the FOFB.
[1]
V. Schlott,et al.
INSERTION DEVICE PHOTON BEAM STUDIES WITH X-RAY MONITORS
,
2005
.
[2]
M. Boge,et al.
Commissioning of the fast orbit feedback at SLS
,
2003,
Proceedings of the 2003 Particle Accelerator Conference.
[3]
V. Schlott,et al.
Bunch Pattern Control in Top-up Mode at the SLS
,
2004
.
[4]
R. Ursic,et al.
Fast closed orbit control in the SLS storage ring
,
1999,
Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366).
[5]
V. Schlott,et al.
Orbit Control at the SLS Storage Ring
,
2003
.