Simultaneous measurement of phonons and ionization using SiCADs

Conference · Mon Nov 01 04:00:00 EST 1993 · Journal of Low Temperature Physics; (United States)

OSTI ID:5417374

Penn, M J; Dougherty, B L; Cabrera, B ^[1]

---

1. Stanford Univ., CA (United States)

The 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 [approximately]370mK and consists of Ti Transition Edge Sensors (TES), having microsecond resolution times, patterned on both sides of a 300[mu]m 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. The detector also allows us to refine recent measurement of the fraction of phonon energy propagating ballistically from nuclear-recoil events.

• DOE Contract Number: FG03-90ER40569
• OSTI ID: 5417374
• Report Number(s): CONF-930751--
• Conference Information: Journal Name: Journal of Low Temperature Physics; (United States) Journal Volume: 93:3-4
• Country of Publication: United States
• Language: English

Related Subjects

440103* -- Radiation Instrumentation-- Nuclear Spectroscopic Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
661300 -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CRYSTALS
DETECTION
ELEMENTS
IONIZATION
MATTER
MEASURING INSTRUMENTS
MONOCRYSTALS
NEUTRINO DETECTION
NONLUMINOUS MATTER
PERFORMANCE TESTING
PHONONS
QUASI PARTICLES
RADIATION DETECTION
RADIATION DETECTORS
SEMIMETALS
SILICON
TESTING