A high dynamic range data acquisition system for a solid-state electron Electric Dipole Moment experiment

TL;DR

This paper presents a custom high-precision 24-bit data acquisition system designed for electron electric dipole moment measurements, emphasizing low noise, high isolation, and minimal cross-talk.

Contribution

The paper introduces a novel DAQ system with fiber optic communication and RF shielding, optimized for ultra-sensitive EDM experiments, which improves noise reduction and channel isolation.

Findings

Achieved high precision (24-bit) measurements with low noise.

Demonstrated effective galvanic isolation and RF shielding.

Reduced channel cross-talk significantly.

Abstract

We have built a high precision (24-bit) data acquisition (DAQ) system with eight simultaneously sampling input channels for the measurement of the electric dipole moment (EDM) of the electron. The DAQ system consists of two main components, a master board and eight individual analog-to-digital converter (ADC) boards. This custom DAQ system provides galvanic isolation, with fiber optic communication, between the master board and each ADC board to reduce the possibility of ground loop pickups. In addition, each ADC board is enclosed in its own heavy-duty radio frequency shielding enclosure and powered by DC batteries, to attain the ultimate low levels of channel cross-talk. In this paper, we describe the implementation of the DAQ system and scrutinize its performance.