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