Speaker
Maria Elena Angoletta
Description
From 2008 onwards the LHC physics programme will include, in addition to proton-
proton collisions, running periods with heavy-ion collisions. The injector complex
has to be adapted in order to satisfy LHC ion requirements. In particular, a Low
Energy Ion Ring (LEIR) has been built at CERN and will be commissioned by early/mid
2006. LEIR will be equipped with a new digital beam control and cavity servoing
system, based on VME modules and daughtercards carrying Analog Devices floating
point DSPs and Altera FPGAs. The system will include, among others, frequency
program, phase and radial loop capabilities, vector sum and dual harmonic cavity
servoing. Several features will be implemented by software, e.g. phase rotation and
signals delay, timing events and reference functions generation. Finally, full
digital diagnostics information will be provided. This system will also serve as a
pilot project for its migration to the other accelerators of the PS complex, such
as the Antiproton Decelerator, the PS Booster and PS. This talk outlines the system
capabilities and the new schemes used for their implementation. Some test results
obtained by a scaled-down version of the system deployed in the PS Booster will
also be given.
