WPS Detector Readout Electronics $349k + 25% Read out waveform (energy + timing) of each pixel2 x 128 ch. offline pulse shape analysis for improved resolution and PID Form e-p coincidences 50 – 750 keV prompt electron 30 keV proton (HV) delayed by 12 – 40 μs TOF Nearest neighbour coincidences for background rejection Energy and Timing Resolution 2 keV energy resolution of electron 12 bit ADC – must sum energy in adjacent pixels and opposite detector 10 ns TOF resolution of proton; 100 ps systematic 100 MHz – detection of initial proton direction in backscattered events HV Optical Isolation 30 kV potential between detectors and ground Scope:
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DAQ Subsystem Christopher Crawford University of Kentucky Robert
Grzywacz University of Tennessee April DoE, Germantown MD Data
Collection WBS Elements 1.10 Data collection systems $426k + 25% a)
Detector Readout Electronics $349k + 23% b) Slow Control $ 4k + 20%
c) HV System $ 73k + 36% * Covered by DOE Project funds Detector
DAQ in its Faraday Cage (WBS 1.10) WPS Detector Readout Electronics
$349k + 25% Read out waveform (energy + timing) of each pixel2 x
128 ch. offline pulse shape analysis for improved resolution and
PID Form e-p coincidences 50 750 keV prompt electron 30 keV proton
(HV) delayed by 12 40 s TOF Nearest neighbour coincidences for
background rejection Energy and Timing Resolution 2 keV energy
resolution of electron 12 bit ADC must sum energy in adjacent
pixels and opposite detector 10 ns TOF resolution of proton; 100 ps
systematic 100 MHz detection of initial proton direction in
backscattered events HV Optical Isolation 30 kV potential between
detectors and ground Scope: Detector Schematic PIXIE-16 Waveform
Digitizers trigger logic PIXIE-16 Waveform Digitizers Filter ADC
FPGA Trigger and Readout Event / Data rate < 5000/s decay rate
in active volume; 600/s protons in upper detector Coincident
electron in adjacent pixel (7/127), either top or bottom detector
Accidentals from decay products
