DESIGN OF KILOGRAM MASS SCALE TES FOR THE CRYOGENIC DARK-MATTER SEARCH

Recently there has been much interest in the direct detection of the d ark matter candidates known as WIMPs. We are developing very sensitive detectors based on phonon detection with transition edge sensors on s ilicon substrates. These detectors will be deployed as part of the Cry ogenic Dark Matter Search in collaboration with the Center for Particl e Astrophysics. As we extend this technology to practical WIMP searche s we will need much higher mass scale detectors. We have demonstrated detectors on 500 mum substrates. To reach the kilogram mass scales we need to pattern wafers that are an order of magnitude thicker with a d etector that is at least two orders of magnitude more sensitive. Progr ess is reported on both these areas and a detector design is discussed .