Reduction of coincident photomultiplier noise relevant to astroparticle physics experiments
| Autor: | N. J. C. Spooner, M. J. Carson, P. K. Lightfoot, M. Robinson, V. A. Kudryavtsev |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Astroparticle physics
Physics Nuclear and High Energy Physics Scintillation Photomultiplier Physics - Instrumentation and Detectors Physics::Instrumentation and Detectors business.industry Astrophysics::Instrumentation and Methods for Astrophysics FOS: Physical sciences Instrumentation and Detectors (physics.ins-det) Scintillator Particle detector Optics Coincident business Instrumentation Noise (radio) Cherenkov radiation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 545:225-233 |
| ISSN: | 0168-9002 |
| DOI: | 10.1016/j.nima.2005.01.319 |
| Popis: | In low background and low threshold particle astrophysics experiments using observation of Cherenkov or scintillation light it is common to use pairs or arrays of photomultipliers operated in coincidence. In such circumstances, for instance in dark matter and neutrino experiments, unexpected PMT noise events have been observed, probably arising from generation of light from one PMT being detected by one or more other PMTs. We describe here experimental investigation of such coincident noise events and development of new techniques to remove them using novel pulse shape discrimination procedures. When applied to data from a low background NaI detector with facing PMTs the new procedures are found to improve noise rejection by a factor of 20 over conventional techniques, with significantly reduced loss of signal events. Comment: Submitted to NIM A |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect