The Sadoulet group is broadly interested in particle cosmology, particularly in the use of novel detector technologies to learn about the fundamental physics of nature. Our work in recent years has centered on the direct detection of dark matter in the universe, blending the intricacies of semiconductor detector physics with one of the most profound "big questions" about our universe.
Our group is currently involved with two major detector technologies:
The Cryogenic Dark Matter Search (CDMS)
The Cryogenic Dark Matter Search (CDMS) is a world-leading experiment to detect the interactions of particle dark matter on Earth. CDMS uses advanced semiconductor detectors to measure the ionization and phonons (vibration) generated by particle impacts, the latter using superconducting transition-edge sensors (TESs).
The primary CDMS installation is in Soudan Underground Mine, half a mile below the surface in northern Minnesota. The Berkeley group is deeply involved in all aspects of the CDMS experiment, most notably with the characterization of current and prototype detectors and the analysis of data from the Soudan site.
Kinetic Inductance Phonon Detectors (KIDs)
Microwave kinetic inductance detectors? (KIDs) are a new technology for the detection of phonons using superconducting microwave resonators. The Sadoulet group (in close collaboration with colleagues at Caltech) is currently developing a prototype dark matter detector based upon kinetic inductance sensor technology.