A new two-dimensional scintillation detector system for small angle neutron scattering experiments
- Resource Type
- Conference
- Authors
- Kemmerling, G.; Engels, R.; Bussmann, N.; Clemens, U.; Heiderich, M.; Reinartz, R.; Rongen, H.; Schelten, J.; Schwan, D.; Zwoll, K.
- Source
- 2000 IEEE Nuclear Science Symposium. Conference Record (Cat. No.00CH37149) Nuclear science symposium Nuclear Science Symposium Conference Record, 2000 IEEE. 1:6/68-6/71 vol.1 2000
- Subject
- Nuclear Engineering
Power, Energy and Industry Applications
Fields, Waves and Electromagnetics
Engineered Materials, Dielectrics and Plasmas
Scintillation counters
Photomultipliers
Position sensitive particle detectors
Solid scintillation detectors
Neutron spin echo
Optical arrays
Spatial resolution
Signal processing
Data processing
Event detection
- Language
- ISSN
- 1082-3654
A new two-dimensional position sensitive detector system for small angle neutron scattering experiments is under development. It is based on a 60/spl times/60 cm/sup 2/ large /sup 6/Li-glass scintillator for the neutron capture and a dispersion of the emitted light on an array of photomultiplier tubes for the derivation of the event position. For subthermal neutrons of 8 /spl Aring/, an efficiency of 96% and a spatial resolution of 8 mm are to be achieved. Major improvements have been made in the signal and data processing branch, which aims at an electronic dead time of 1 /spl mu/s. A fast digitalization method using free running ADCs for each photomultiplier combined with FPCAs for a parallel event detection in all channels have been applied. A subsequent farm of up to 16 floating point DSPs is to provide enough computing power for an improved reconstruction of the event position according to a maximum likelihood method.