High-Purity Germanium Crystal Growth and the Performance of a SuperCDMS Detector Fabricated from a USD Crystal.

ORAL

Abstract

High-purity germanium crystals with 12 cm in diameter were grown by Czochralski method. The dislocation density was investigated by microscopy. The impurity distribution in the crystals was measured by Hall effect and Photo-thermal ionization spectroscopy (PTIS). A 2.3kg crystal was fabricated into a SuperCDMS detector by Texas A{\&}M University, which was tested by University of Minnesota. The results show the detector has interesting performance. Keywords: High-purity germanium crystal, Czochralski method This work is supported by DOE grant DE-FG02-10ER46709 and the state of South Dakota.

–

Authors

  • Guojian Wang

    Department of Physics, University of South Dakota, University of South Dakota, Univ of South Dakota

  • Hao Mei

    Department of Physics, University of South Dakota

  • Dongming Mei

    Department of Physics, University of South Dakota

  • Gang Yang

    Department of Physics, University of South Dakota