| Performance measurements of a new large area neutron scintillation detector system (2004) | |||||||||||
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| IEEE TRANSACTIONS NUCLEAR SCIENCE VOL JUNE Performance Measurements New Large Area Neutron Scintillation Detector System Kemmerling nten Clemens Engels Member IEEE Heiderich Pykhout Hintzen Rongen Schelten Schwahn and Zwoll Abstract During the upgrade the small angle neutron scattering instrument KWS the research reactor FRJ the old detector system has been replaced While the Anger camera based concept the detector remained unchanged the signal and data processing branch has been completely revised Because higher count rate requirements highly configurable parallel readout electronics has been developed aiming counting rates several hundred kilohertz The whole detector system has been recently installed KWS and measurements study the system performance have been carried out The linearity and spatial resolution the new detector have been determined analysis acquired image taken with hole diaphragm front the scintillator The overall system dead time has been measured comparing the detector count rates several scattering intensities the count rates achieved with fission chamber Finally scattering patterns well known samples have been taken order demonstrate the quality the acquired images Index Terms Anger camera position sensitive scintillation neutron detector counting rates above kHz The limiting factor was the readout electronics Due analog based calculation the neutron position large shaping times the analog signals were required resulting dead time about Thus take advantag | |||||||||||
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