  The electromagnetic barrel calorimeter is one of the main components of the
planned GlueX experiment. It will consist of 48 modules made of consecutive
layers of 4 m long lead sheet and fast green scintillator fibers for an overall
number of approximately 3000 readout channels with silicon
photomultiplier-based photo-sensors for light collection. The calorimeter is
expected to achieve energy and time resolution better than 5%/sqrt(E)+2% and
200 ps, respectively.
  In this contribution we present an overview of the calorimeter design and
some preliminary studies of its performance using Monte Carlo simulations and
beam test measurements.
