Development of a cryogenic dark matter detector

Astronomy and Astrophysics – Astronomy

Scientific paper

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Cryogenic Equipment, Dark Matter, Gamma Ray Astronomy, Particle Energy, Germanium, Nuclear Reactions, Particle Interactions, Radiation Counters

Scientific paper

The continuing development of a cryogenic dark matter detector is described. 60-keV gamma pulses with submicrosecond risetimes have been observed in neutron transmission doped germanium thermistors, consistent with the hot electron model. A eutectic bonding method for attaching thermistors to a larger crystal is described, and preliminary studies of the phonon transmission qualities of this technique are discussed. The measurement of ionization created by particle interactions in a pure germanium crystal with applied bias fields as low as 1 V/cm is demonstrated.

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