Speaker
Philippe Baudrenghien
(CERN)
Description
I will first briefly present the LHC reference RF generation (one per ring) and the LLRF field control (one system per cavity). I will then concentrate on the issue of RF phase noise: The performance achieved with the LHC cavities will be presented in details and we will try to extrapolate these results to the Crab Cavities. A possible interfacing of the Crab Cavities with the 400 MHz reference RF and with the Control System (Functions) will be described. The operational scenario will then be outlined: RF controls to make a detuned crab cavity at "zero" voltage invisible to the beam over the LHC injection and ramp while retuning and gradually ramping the cavity voltage over the course of a physics store to perform luminosity leveling. Finally a candidate prototype LLRF system will be presented.
Author
Philippe Baudrenghien
(CERN)
