Bernard Sadoulet

University of California, Berkeley, Berkeley, California ~Professor of Physics. Instrumentalist working in particle cosmology. Involved in the Mark I experiment at slac National Accelerator Laboratory, where the Psi and charm particles were discovered. Played a leading role in the ua1 experiment at cern, which discovered the W and Z intermediate vector bosons. Focused on particle astrophysics and, as Director of the Center for Particle Astrophysics, contributed to the recognition of particle cosmology, the study of the fundamental physics behind dark matter, dark energy, and inflation. Helped establish the scientific importance of searches for weakly interactive massive particles (wimp), now considered the main candidate for the explanation of dark matter as a manifestation of new physics at the electroweak scale. Novel instrumentation of ultra-low-temperature particle detectors that he pioneered has consistently placed his experiment, the Cryogenic Dark Matter Search (cdms), at the leading edge of wimp searches worldwide. Highlighted the need for identifying nuclear recoils to recognize wimp interactions and demonstrated that this can be achieved by simultaneously measuring the produced ionization and phonons.~