Support of Low-Level Instrument Background for HPGe Detectors

The development results are presented for high-purity germanium (HPGe) detectors with low-level instrument background used in the Germanium Experiment on the measurement of Magnetic Moment of Antineutrino—GEMMA. Special design considerations for the cryostats have focused on mass reduction of materials surrounding the detector and the use of materials with very low radiation impurities.