A Low-Noise Germanium Ionization Spectrometer for Low-Background Science

作者：Aalseth Craig E; Colaresi Jim; Collar Juan I; Fast James E; Hos**ach Todd W; Orrell John L^*; Overman Cory T; Scholz Bjorn; Vandevender Brent A; Yocum K Michael

来源：IEEE Transactions on Nuclear Science, 2016, 63(6): 2782-2792.

DOI：10.1109/TNS.2016.2614431

• COMSOL thermal model
• cryostat
• dark matter
• low-noise detector
• neutrino nucleus coherent scattering
• p-type point contact high purity germanium ionization spectrometer

Recent progress on the development of very low noise high purity germanium ionization spectrometers has produced an instrument of 1.2 kg mass and excellent noise performance. The detector was installed in a low-background cryostat intended for use in a direct detection search for low mass, WIMP dark matter. This transaction reports the thermal characterization of the cryostat, specifications of the newly prepared 1.2 kg p-type point contact germanium detector, and the spectroscopic performance of the integrated system. The integrated detector and low background cryostat achieved full-width-at-half-maximum noise performance of 98 eV for an electronic pulse generator peak and 1.9 keV for the 1332-keV Co-60 gamma ray.

• 出版日期2016-12