A mult-strip low threshold germanium detector for investigation of rare processes

A construction of low threshold (Ethr <200 eV) germanium detector with mass of several hundred grams is proposed. The detector having such characteristics are needed for investigation of rare processes like neutrino-electron scattering, coherent scattering of neutrino by nuclei and search for Dark Matter. HPGe detectors being used presently for such investigations have energy threshold about 2 keV for mass near 1–2 kg. A design of new type of germanium detector is suggested. The multi-strip configuration of anode of this detector provides significant decreasing of capacitance and leakage current of each strip-detector providing high-energy resolution (and low threshold) for each strip. On the other hand, multi-strip anode configuration provides large fiducial volume of such detector and thereby significant increasing of detector mass (by more than two orders of magnitude as compared with mass of X-ray germanium detectors having analogous energy resolution).