DEPFET detectors for direct detection of MeV Dark Matter particles

摘要

The existence of dark matter is undisputed, while the nature of it is stillunknown. Explaining dark matter with the existence of a new unobserved particleis among the most promising possible solutions. Recently dark matter candidatesin the MeV mass region received more and more interest. In comparison to themass region between a few GeV to several TeV, this region is experimentallylargely unexplored. We discuss the application of a RNDR DEPFET semiconductordetector for direct searches for dark matter in the MeV mass region. We presentthe working principle of the RNDR DEPFET devices and review the performanceobtained by previously performed prototype measurements. The future potentialof the technology as dark matter detector is discussed and the sensitivity forMeV dark matter detection with RNDR DEPFET sensors is presented. Under theassumption of three background events in the region of interest and an exposureof one kg$\cdot$y a sensitivity of $\bar{\sigma}_{\bar{e}} = 10^{-41}$ cm$^{2}$for dark matter particles with a mass of 10 MeV can be reached.