Booster Synchrotron Frequency Below Transition

TL;DR

This paper discusses measuring the dipole mode synchrotron frequency to characterize beam dynamics and estimate effective RF voltage in particle accelerators, emphasizing the importance of precise measurement for understanding energy loss.

Contribution

It demonstrates that the synchrotron frequency measured from the phase detector signal can reliably estimate the effective RF voltage, aiding in beam diagnostics.

Findings

Synchrotron frequency measurement agrees with calculations.

Effective RF voltage can be inferred from synchrotron frequency.

Measurement precision is crucial for accurate beam parameter estimation.

Abstract

The dipole mode synchrotron frequency is a basic beam parameter; it and a few similarly basic quantities measured at small time intervals serve to characterize the longitudinal beam dynamics throughout the acceleration cycle. The effective accelerating voltage, in conjunction with the amount of rf voltage required for the acceleration, is important for the estimate of the beam energy loss per turn. The dipole mode frequency can be used to obtain the effective accelerating rf voltage, providing that it can be measured precisely. The synchrotron frequency measured from the synchrotron phase detector signal (SPD) generally agrees well with calculation, and it can be applied for such purposes as inferring the effective rf voltage.