• S.R. Marques, O.R. Bagnato, R.H.A. Farias, F. R. Francisco, R.T. Neuenschwander, F. Rodrigues, A.L. Rosa, R.M. Seraphim, P.F. Tavares, M.M. Xavier
  LNLS, Campinas

We describe the development of a new button-type beam position monitor (BPM) for the Brazilian Synchrotron Light Source (LNLS) electron storage ring. One third of the storage ring stripline BPMs were replaced whit this new model, which counts on bellows, temperature stabilization and new support stands in order achieve improved mechanical stability. Finally, in-vacuum heat absorbers were installed at the upstream vacuum tubes of the bending magnets to minimize the vacuum chamber motion due to the high thermal load. We also present performance results.