Journal of Low Temperature Physics

, Volume 93, Issue 3–4, pp 761–766 | Cite as

Data acquisition system for dark matter detectors

  • Igor R. Sagdeev
  • Andrzej K. Drukier
  • Dan J. Welsh
Assorted Topics
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Abstract

Progress in Ge detector technology has resulted in ultralow backgrounds of less than 0.3 counts keV−1 kg−1 d−1 at energies between 5 and 12 keV, and less than 1.0 counts kev−1 kg−1 d−1 for energies between 3 and 5 keV. Coupled with good energy resolution, 0.4 keV FWHM at 10 keV, this allows searches for DM particles with m ≥8 GeV/c2.

Electromagnetic interference and acoustical pick-up are the main sources of background in the best Ge detectors. These problems are even more important in cryogenic WIMP detectors under development. A PC-based on line pulse shape analysis system is presented which permits rejection of about 95% percent of the EMI/ acoustical background. The hardware uses a low cost, commercially available digital storage oscilloscope. The software consists of about 20,000 lines of code in Pascal and assembly language. We tested this system using a low radioactive background Ge-system on the Earth's surface. For low energy events (27 keV photons) this system permits improvement in the background from 0.1 cpm to 2 cpd.

Keywords

Dark Matter Assembly Language Storage Oscilloscope Matter Detector Digital Storage Oscilloscope 

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Copyright information

© Plenum Publishing Corporation 1993

Authors and Affiliations

  • Igor R. Sagdeev
    • 1
  • Andrzej K. Drukier
    • 1
    • 2
  • Dan J. Welsh
    • 1
  1. 1.Department of PhysicsUniversity of South CarolinaColumbiaUSA
  2. 2.also, BioTraces Inc.GreenbeltUSA

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