  The DIRC, a novel type of Cherenkov ring imaging device, is the primary
hadronic particle identification system for the BaBar detector at the
asymmetric B-factory Pep-II at SLAC. It is based on total internal reflection
and uses long, rectangular bars made from synthetic fused silica as Cherenkov
radiators and light guides. BaBar began taking data with colliding beams in
late spring 1999. This paper describes the challenges for the DIRC in a higher
luminosity environment and shows solutions to these challenges.
