ISSN:
1573-7357
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract Our group at Stanford has configured a double-sided Silicon Crystal Acoustic Detector (SiCAD) for simultaneous measurement of both phonons and ionization. This detector operates at ∼370mK and consists of Ti Transition Edge Sensors (TES), having microsecond resolution times, patterned on both sides of a 300µm thick Si wafer. Distinguishing an electron-recoil event from a nuclear-recoil event is possible due to the different partitioning of energy into phonons vs. ionization for the two types of event. This is a powerful background rejection technique for neutrino physics experiments and dark matter searches where the events of interest are nuclear-recoils. In addition, the phonon sensor is position sensitive. In particular, it determines the depth of an event and can be used to reject events occurring near the surface. This detector also allows us to refine our recent measurement of the fraction of phonon energy propagating ballistically from nuclear-recoil events1.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00693455
Permalink
