A Compact, Highly Scalable, Low-Power, and Multi-Channel Charge Digitizer for Beam Profile Monitoring

This paper describes a compact, highly scalable, low-power, and multi-channel charge digitizer (MCCD) designed for synchrotron beam profile monitoring. The MCCD utilizes charge amplifiers, voltage amplifiers, programmable-gain ampli-fiers (PGAs), and ADCs to amplify and digitize input signals. The MCCD also demonstrates a novel stackable PCB design to easily reconfigure the channel count. Laboratory measurement results show a sample rate of 200 Hz per channel, gain of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$6.64 \times 10^{11}$</tex> V/C, noise of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$1.36 \times 10^5 e_{r m s}^{-}$</tex>, and power of 97 mW/channel.