Tune Evaluation From Phased BPM Turn-By-Turn Data

TL;DR

The paper introduces a phasing-based method for more accurate betatron tune evaluation in fast ramping synchrotrons, addressing noise and rapid tune changes, with implementation and results from Fermilab Booster.

Contribution

A novel phasing technique that improves tune measurement accuracy in noisy, rapidly changing environments like Fermilab Booster.

Findings

Enhanced signal-to-noise ratio through phasing

Successful implementation in Fermilab Booster system

Improved tune evaluation during rapid ramping

Abstract

In fast ramping synchrotrons like the Fermilab Booster the conventional methods of betatron tune evaluation from the turn-by-turn data may not work due to rapid changes of the tunes (sometimes in a course of a few dozens of turns) and a high level of noise. We propose a technique based on phasing of signals from a large number of BPMs which significantly increases the signal to noise ratio. Implementation of the method in the Fermilab Booster control system is described and some measurement results are presented.