Title :
Single-photoelectron noise reduction in scintillation detectors
Author :
Marvin, Thomas P.
Author_Institution :
Southern Oregon State Coll., Ashland, OR, USA
Abstract :
The 1994-95 search at SLAC for millicharged particles used four 21×21×130-cm3 Bicron 408 scintillation counters to detect a signal at the single-photoelectron level. The competing noise requiring minimization was due to combination of PM tube (8-inch Thorne EMI 9353KA) afterpulsing and ambient radiation-induced scintillator luminescence. A very slow decay (>30 μs) component was observed and received particular attention. Efforts to reduce the SPE noise included photomultiplier tube base modifications, detector shielding and cooling, signal amplification, and veto procedures
Keywords :
electron device noise; noise; photomultipliers; solid scintillation detectors; 130 cm; 21 cm; Bicron 408; Thorne EMI 9353KA; detector cooling; detector shielding; millicharged particles; photomultiplier afterpulsing; scintillation detectors; signal amplification; single-photoelectron noise reduction; veto procedures; Cooling; Copper; Linear accelerators; Luminescence; Noise measurement; Noise reduction; Photomultipliers; Radiation detectors; Scintillation counters; Solid scintillation detectors;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-3180-X
DOI :
10.1109/NSSMIC.1995.510381
