Classical and modern power spectrum estimation for tune measurement in CSNS RCS

TL;DR

This paper compares classical and modern power spectrum estimation methods for precise betatron tune measurement in CSNS RCS, demonstrating that modern methods offer better performance despite higher computational complexity.

Contribution

It introduces a comparison between classical and modern power spectrum methods for tune measurement, highlighting the superior performance of modern techniques.

Findings

Modern power spectrum methods outperform classical ones in accuracy.

Simulation and experimental data confirm improved resolution with modern methods.

Modern methods involve more complex calculations but yield better results.

Abstract

Precise measurement of betatron tune is required for good operating condition of CSNS RCS. The fractional part of betatron tune is important and it can be measured by analyzing the signals of beam position from the appointed BPM. Usually these signals are contaminated during the acquisition process, therefore several power spectrum methods are used to improve the frequency resolution. In this article classical and modern power spectrum methods are used. In order to compare their performance, the results of simulation data and IQT data from J-PARC RCS are discussed. It is shown that modern power spectrum estimation has better performance than the classical ones, though the calculation is more complex.