Particle identification and revolution time corrections for the isochronous mass spectrometry in storage rings

TL;DR

This paper presents a data analysis method that effectively corrects for magnetic field instabilities in isochronous mass spectrometry, improving particle identification and mass measurement accuracy in storage ring experiments.

Contribution

A novel data analysis technique that mitigates magnetic field instability effects in IMS, enhancing the precision of revolution time measurements and particle identification.

Findings

Method reduces uncertainties caused by magnetic field variations.

Effective for magnetic field fluctuations up to ΔB/B ~ 10^{-4}.

Improves accuracy of mass determinations in IMS.

Abstract

In the isochronous mass spectrometry (IMS) performed at storage rings, masses of short-lived nuclides are determined through precision measurements of their mean revolution times. However, the distribution of revolution times could be seriously deteriorated by instabilities of the ring's magnetic fields. This becomes a significant obstacle for the particle identifications and mass determinations. A data analysis method is described in this paper which is able to largely remove the uncertainties caused by the magnetic field instabilities in the particle identifications and the mean revolution times. We show that this method is very effective for the IMS experiments even when the magnetic fields of a storage ring vary slowly up to a level of $\Delta B/B\sim 10^{-4}$.