Title :
Investigation of a thick Si diode ionization detector at low temperatures for dark matter searches
Author :
Spooner, N.J.C. ; Homer, G.J. ; Smith, P.F.
Author_Institution :
NPL, Oxford, UK
fDate :
4/1/1993 12:00:00 AM
Abstract :
The sensitivity and charge collection characteristics of a 1-mm-thick commercial Si diode ionization detector for use in a hybrid dark matter detector are described. Particle counting with 57Co and 241Am X-ray sources was used to study the variation in sensitive volume and charge collection as a function of temperature and bias. Operating temperatures down to 30 mK were investigated. At this temperature, full volume sensitivity and a near 100% charge collection was observed at 30 mK, with applied biases at low as 5 V
Keywords :
ionisation chambers; semiconductor counters; semiconductor diodes; 1 mm; 30 mK; 5 V; 241Am; 57Co; Si diode ionization detector; X-ray sources; bias voltage; charge collection; dark matter; low temperatures; sensitivity; thick; Detectors; Diodes; Electrons; Energy measurement; Event detection; Extraterrestrial measurements; Ionization; Phonons; Temperature sensors; Thermal resistance;
Journal_Title :
Nuclear Science, IEEE Transactions on
