Time and position sensitive single photon detector for scintillator read-out
Sven Sch\"ossler, Benjamin Bromberger, Michal Brandis, Lothar Ph. H., Schmidt, Kai Tittelmeier, Achim Czasch, Volker Dangendorf, Ottmar Jagutzki

TL;DR
This paper presents a novel photon counting detector system capable of determining position, time, and intensity of photon flashes in scintillators, suitable for high-throughput neutron and gamma radiography applications.
Contribution
The development of a fast, position- and time-sensitive photon detector with pulse-height discrimination for combined neutron and gamma imaging systems.
Findings
Demonstrated effective position and time resolution in tests.
Implemented a pulse-height-to-time converter circuit for energy discrimination.
Showed suitability for automated cargo inspection systems.
Abstract
We have developed a photon counting detector system for combined neutron and gamma radiography which can determine position, time and intensity of a secondary photon flash created by a high-energy particle or photon within a scintillator screen. The system is based on a micro-channel plate photomultiplier concept utilizing image charge coupling to a position- and time-sensitive read-out anode placed outside the vacuum tube in air, aided by a standard photomultiplier and very fast pulse-height analyzing electronics. Due to the low dead time of all system components it can cope with the high throughput demands of a proposed combined fast neutron and dual discrete energy gamma radiography method (FNDDER). We show tests with different types of delay-line read-out anodes and present a novel pulse-height-to-time converter circuit with its potential to discriminate gamma energies for the…
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