[en] This group is engaged in a wide variety of experiments using beams accelerated by the Bevalac. In recent years, interests have ranged from nuclear structure physics to reaction mechanism studies at very high energies. They authors are currently involved in two major development projects. The first is their segmented Cerenkov detector which they have built to measure the interaction mean free paths of secondary fragments produced in relativistic heavy ion collisions. The development of this device was spurred by the observation first in the cosmic rays and later in experiments at the Bevalac that a fraction of projectile fragments produced in relativistic heavy ion collisons have interaction mean free paths that are very much shorter than normal. Anomalons, the particles responsible for this effect, are the subject of great current interest. The second major project is the development of a Cerenkov detector to be used at the HISS facility. This is a novel device, the design of which has been very much influenced by the experience with Cerenkov detectors that the authors have gained during their anomalon experiment. The detector will be a hodoscope of total internal reflection counters capable of measuring both the charge and the velocity of projectile fragments at least up to mass 100