Automatic phase calibration for RF cavities using beam-loading signals

TL;DR

This paper introduces a new RF signal-based method for real-time, automated calibration of cavity phase in particle accelerators, eliminating the need for human intervention and improving operational stability.

Contribution

A novel scheme that uses only RF beam-loading signals for automatic, real-time cavity phase calibration, simplifying the process and enhancing accelerator reliability.

Findings

The method accurately determines beam phase relative to the cavity.

It enables real-time, automated phase adjustments without human input.

The approach improves the stability and reliability of accelerator operations.

Abstract

Precise calibration of the cavity phase signals is necessary for the operation of any particle accelerator. For many systems this requires human in the loop adjustments based on measurements of the beam parameters downstream. Some recent work has developed a scheme for the calibration of the cavity phase using beam measurements and beam-loading however this scheme is still a multi-step process that requires heavy automation or human in the loop. In this paper we analyze a new scheme that uses only RF signals reacting to beam-loading to calculate the phase of the beam relative to the cavity. This technique could be used in slow control loops to provide real-time adjustment of the cavity phase calibration without human intervention thereby increasing the stability and reliability of the accelerator.