ASIC for Small Angle Neutron Scattering Experiments at the SNS

We present an ASIC for a 3 He gas detector to be used in small angle neutron scattering experiments at the spallation neutron source in oak ridge. The ASIC is composed of 64 channels with low noise charge amplification, filtering, timing and amplitude measurement circuits, where an innovative curren...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2007-06, Vol.54 (3), p.541-548
Main Authors: De Geronimo, G., Fried, J., Smith, G.C., Bo Yu, Vernon, E., Britton, C.L., Bryan, W.L., Clonts, L.G., Frank, S.S.
Format: Article
Language:English
Subjects:
ADC
Application specific integrated circuits
ASIC
Channels
Charge
Charge measurement
Circuit noise
Current measurement
Digitization
Filtering
Filtration
gas detector
Gas detectors
Neutron scattering
Neutron sources
Neutron spin echo
Noise level
peak detector
Spallation
Timing
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Description
Summary:We present an ASIC for a 3 He gas detector to be used in small angle neutron scattering experiments at the spallation neutron source in oak ridge. The ASIC is composed of 64 channels with low noise charge amplification, filtering, timing and amplitude measurement circuits, where an innovative current-mode peak-detector and digitizer (PDAD) is adopted. The proposed PDAD provides at the same time peak detection and A/D conversion in real time, at low power, and without requiring a clock signal. The channels share an efficient data sparsification and derandomization scheme, a 30-bit 256 deep FIFO, and low voltage differential signaling.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2007.893718