Phonon-mediated detection of elementary particles using silicon crystal acoustic detectors

Physics – Condensed Matter – Superconductivity

Scientific paper

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Acoustics, Astrophysics, Neutrinos, Phonons, Radiation Detectors, Signal Detectors, Silicon, Superconductivity, Thin Films, Titanium, Wafers, Bias, Cryogenic Temperature, Crystal Structure, Crystallinity, Direct Current, Labyrinth, Substrates

Scientific paper

A research group at Stanford is developing Silicon Crystal Acoustic Detectors (SiCADs) which operate at cryogenic temperatures and sense phonons generated when an incident particle scatters off a nucleus or electron in the crystalline Si wafer substrate. In the present design photon sensors consist of a thin film labyrinth pattern of superconducting titanium, which is dc current biased at a temperature just below its superconducting to normal transition (approx. 430 mK). The motivation for developing SiCADs includes their many direct applications to neutrino physics, particle astrophysics, and solid state physics.

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