نتایج جستجو برای: square photomultiplier tubes
تعداد نتایج: 157109 فیلتر نتایج به سال:
The light gains of a detector system (PMT and scintillator) is characterized by the number photoelectrons produced per unit energy (usually MeV). In this study, results gain tests for 10 Hamamatsu R11833 model photomultiplier tubes (PMT) are shown. Various radioactive sources were used in conjunction with EJ309 liquid scintillator to determine gain. was determined comparing size signal generate...
Light falling on a photodetector produces an output current that fluctuates. The noise in this signal arises from two sources: randomness in the photon arrivals and randomness in the carrier multiplication process intrinsic to the photodetector. A general formula is derived for the variance of the photodetector output current in terms of parameters characterizing these two sources of randomness...
A new gamma camera dedicated to scintimammography (single photon emission mammography—SPEM) now has a full-breast field of view. One can clinically examine a mildly compressed breast with a cranio-caudal-like projection as one would in X-ray mammography. This camera is based on pixelated scintillation arrays and position sensitive photomultiplier tubes. By reducing the collimator-tumor distance...
A Pulsating Aurora Imaging Photometers Stereoscopic System (PAIPS) is suggested and described in the paper. The system based on two lens telescopes with a matrix of multianode photomultiplier tubes as photodetectors placed high latitude observatories Polar Geophysical Institute. Telescopes provide simultaneous observations large volume atmosphere at altitudes range 50–100 km temporal resolution...
Photek has been working with AWE to provide photomultiplier (PMT) solutions for fusion diagnostics. By using microchannel plates (MCP) as the gain medium, the time response of the PMTs can be as fast as 100 ps FWHM. We will present data showing developments in the accurate measurement of the true impulse response of the fastest detectors. We will also show improvements in the pulse uniformity a...
The high resolution Fly’s Eye (HiRes) detector in Dugway, Utah, is an air fluorescence detector designed for the measurement of the energy and arrival direction of cosmic ray particles with energy E > 10 eV. HiRes monitors the night sky for fluorescence light from air shower cascades induced by cosmic ray primaries. The light is collected by mirrors and projected onto arrays of photomultiplier ...
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