• L. Sanfelici, S.R. Marques, X.R. Resende
  LNLS, Campinas
• K. Raizer
  UNICAMP, Campinas, São Paulo

This paper reports on the LNLS experience with the digital electron beam position monitor Libera Brilliance through the realization of several standard accelerator physics experiments, taking advantage mainly of the equipment’s turn-by-turn capabilities.

• S.R. Marques, R.H.A. Farias, L. Sanfelici, P.F. Tavares
  LNLS, Campinas

The main facility of the Brazilian Synchrotron Light Laboratory is a 1.37 GeV Synchrotron Light Source. The accelerator ring can be filled with up to 148 electron bunches and the initial current of 250 mA decreases down to 150 mA at the end of the user’s shifts. The beam energy is ramped down to 500 MeV, the current is refilled and the energy is ramped up again to 1.37 GeV for a new shift. Coupled-bunch instabilities excited by different sources can negatively impact the light source performance either lowering the brilliance of the beam or causing beam losses in the energy ramps. The upcoming new insertion devices and beamlines are pushing up the beam stability requirements even more. We present the current status of a digital feedback system that is being designed for controlling transversal and longitudinal beam instabilities.