• M.M. Xavier, S.R. Marques, A.F.A.G. Moreira
  LNLS, Campinas

As part of our efforts to improve beam stability in LNLS light source, we developed a system for automating tune measurements in the storage ring. This system is based on a commercial spectrum analyzer controlled via a GPIB port fed by a difference signal from a stripline pickup. Following a tandem-like approach, the software is divided in two parts: one inside the main operation software in the control system, which sends commands, and another one designed for receiving these commands and to suitably manage the analyzer The system is capable of setting the analyzer for optimal measurements for almost all operating conditions of the machine. This is achieved through feedback algorithms and triggered events. This tool improves machine diagnostics during failure conditions such as undesired magnet changes and is fast enough to enable tune tracking during particular events, such as ID movements and energy ramps.