A new ring structure for muon (g-2) measurements

TL;DR

This paper proposes a novel ring structure with uniform magnetic field for precise muon g-2 measurements, utilizing proton calibration to achieve high accuracy in determining the muon's anomalous magnetic moment.

Contribution

It introduces a new ring design that maintains a uniform magnetic field independent of orbit radius, enabling more accurate muon g-2 measurements.

Findings

Potential measurement precision of 0.03 ppm.

Calibration method using transversely polarized protons.

Feasibility of the proposed ring structure for high-precision experiments.

Abstract

In a storage ring of discrete magnets with uniform field and edge focusing, the field averaged over the orbit can be independent of orbit radius (particle momentum). This ring is suitable for measuring the anomalous magnetic moment of the muon. The field, averaged over the orbit, can be calibrated by injecting transversely polarized protons of the same momentum and measuring the proton (g-2) precession. A measurement at the level of 0.03 ppm may be feasible.