A new two-dimensional scintillation detector system for small angle neutron scattering experiments

Kemmerling, G.; Engels, R.; Heiderich, M.; Rongen, H.; Schwan, D.; Zwoll, K.; Reinartz, R.; Clemens, U.; Schelten, J.; Bussmann, N.

doi:10.1109/23.958733

Journal Article

A new two-dimensional scintillation detector system for small angle neutron scattering experiments

Kemmerling, G.FZJ* ; Engels, R.FZJ* ; Bussmann, N.FZJ* ; Clemens, U.FZJ* ; Heiderich, M.FZJ* ; Reinartz, R.FZJ* ; Rongen, H.FZJ* ; Schelten, J.FZJ* ; Schwan, D.FZJ* ; Zwoll, K.FZJ*

2001
IEEE New York, NY

IEEE transactions on nuclear science 48, 1114 (2001) [10.1109/23.958733]

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Please use a persistent id in citations: http://hdl.handle.net/2128/1306 doi:10.1109/23.958733

Abstract: A new two-dimensional position-sensitive detector system for small-angle neutron scattering experiments is under development. It is based on a 60 x 60 cm(2) large Li-6-glass scintillator for the neutron capture and dispersion of the emitted light on an array of photomultiplier tubes for the derivation of the event position. For subthermal neutrons of 8 Angstrom, 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 electronical dead time of 1 mus. A fast digitalization method using free-running analog-to-digital converters for each photomultiplier combined with field-programmable gate arrays for a parallel event detection in all channels has been applied. A subsequent farm of up to 16 floating-point digital signal processors is used to provide enough computing power for an improved reconstruction of the event position according to a maximum likelihood method.

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Appears in the scientific report 2001
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