Synchronization and Phase Locking of Resonant Magnet Power Supplies For Mu2e Experiment at Fermilab

TL;DR

This paper describes a control system using FPGA technology to synchronize and phase-lock resonant magnet power supplies for the Mu2e experiment, ensuring precise beam control and timing.

Contribution

It introduces a novel FPGA-based control system for phase-locking and synchronization of high-frequency magnet power supplies in a particle physics experiment.

Findings

Successful phase-locking of magnet systems at 295 kHz and 4.42 MHz frequencies.

Precise synchronization with beam transfers from the Recycler.

Implementation of phase jumps for accurate timing alignment.

Abstract

The Muon-to-Electron Conversion (Mu2e) Experiment demands a highly precise magnet and collimator system to achieve a stringent extinction level of $1\times 10^{-10}$ for out-of-time beam particles. Extinction is ensured by an AC Dipole system consisting of two magnet components: a 295 kHz system to allow for the passage of a 590 kHz beam at the nodes, and a 4.42 MHz system to minimize in-time beam slewing. Both components must be accurately phase-locked to the Delivery Ring's bunch rate as well as be synchronized with beam transfers from the Recycler. In this paper, we present the design, implementation, and results of a control system for the Mu2e magnet system based on an Intel Arria 10 FPGA. This system handles the phase-locking of the magnets to the Delivery Ring, as well as the phase jumps required for synchronization with transfers from the Recycler.