Data Acquisition and Digital Signal Processing for the Nab Experiment*

The goal of the Nab experiment is to measure the electron-neutrino correlation parameter (a) with an uncertainty of 0.001 and the Fierz interference term (b) with an uncertainty of 0.005 by measuring both the electron and proton energy in coincidence for full kinematic reconstruction of the electron neutrino angle.  In order to reach this precision, a custom DAQ system with high noise tolerance, low trigger threshold, and high acceptance rates for the multi-pixel silicon detectors is required.  We have developed a new DAQ architecture based on deep onboard memory buffers and high-speed field-programmable gate arrays to streamline global trigger logic. We will present this novel system and advanced DSP filters which allow us to detect protons accelerated to 30 kV in coincidence with electrons with high efficiency and event rate.