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Published September 16, 1994 | Published
Book Section - Chapter Open

Cryogenic germanium detectors for a weakly interactive massive particle (WIMP) dark-matter search


We are preparing an experimental search for weakly interacting massive particle (WIMP) dark matter using cryogenic germanium detectors. These detectors measure both the ionization and phonons produced by particle interactions in the substrate. The ionization measurement uses low drift fields, approximately equals 1 V/cm. The phonon measurement is made using neutron transmutation doped (NTD) germanium thermistors. Simultaneous detection of phonons and ionization allows us to discriminate between electron-recoil and nuclear-recoil events which gives a powerful method for isolating possible WIMP events (nuclear recoils) from background gamma ray events (electron recoils). Recent work on our understanding and optimization of these detectors will be presented.

Additional Information

© 1994 Society of Photo-optical Instrumentation Engineers (SPIE). This work was supported by the Center for Particle Astrophysics, a National Science Foundation Science and Technology Center operated by the University of California, Berkeley, under Cooperative Agreement No. AST-8809616, and by the Department of Energy under contract DE-76SF00098.

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August 20, 2023
August 20, 2023