Modelling of Beam Dynamics for the New Muon g-2 Experiment at FNAL
Lead Research Organisation:
University of Liverpool
Department Name: Physics
Abstract
Measurements of the anomalous magnetic moment (g-2) of the muon have indicated a small difference from the value predicted by the Standard Model of particle physics: any difference would indicate the existence of new physics. However, the precision of existing measurements is not sufficient to confirm a discrepancy between theory and measurement with any certainty. A new experiment, presently under construction at Fermilab, aims to improve the measurement precision of the muon g-2 by at least a factor of four over previous measurements. This will establish with confidence whether or not there is a significant difference between the measured and theoretical values.
The anomalous magnetic moment of the muon is measured by observing the spin precession of a bunch of muons as they move through a uniform magnetic field in a storage ring. The precision of the measurement depends critically on a detailed understanding of the properties of the particles as they are injected into the storage ring, including (for example) effects such as correlations between spin and momentum. The goal of this project is to construct a computer model including all relevant details of the accelerator systems, from the production target for pions (which decay into muons), through various transport lines to the storage ring. Using this model, it will be possible to identify the potential impact of numerous machine properties on the measured value of the muon g-2, allowing reduction of systematic errors and yielding a value for g-2 with sufficient precision to determine the existence of any new physics.
The anomalous magnetic moment of the muon is measured by observing the spin precession of a bunch of muons as they move through a uniform magnetic field in a storage ring. The precision of the measurement depends critically on a detailed understanding of the properties of the particles as they are injected into the storage ring, including (for example) effects such as correlations between spin and momentum. The goal of this project is to construct a computer model including all relevant details of the accelerator systems, from the production target for pions (which decay into muons), through various transport lines to the storage ring. Using this model, it will be possible to identify the potential impact of numerous machine properties on the measured value of the muon g-2, allowing reduction of systematic errors and yielding a value for g-2 with sufficient precision to determine the existence of any new physics.
Organisations
Publications
Abi B
(2021)
Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm.
in Physical review letters
Albahri T
(2021)
Magnetic-field measurement and analysis for the Muon g - 2 Experiment at Fermilab
in Physical Review A
Albahri T
(2021)
Beam dynamics corrections to the Run-1 measurement of the muon anomalous magnetic moment at Fermilab
in Physical Review Accelerators and Beams
Albahri T
(2021)
Measurement of the anomalous precession frequency of the muon in the Fermilab Muon g - 2 Experiment
in Physical Review D
Herrod Alexander
(2017)
Modelling of Curvilinear Electrostatic Multipoles in the Fermilab Muon g-2 Storage Ring
Wolski A
(2018)
Explicit symplectic integrator for particle tracking in s -dependent static electric and magnetic fields with curved reference trajectory
in Physical Review Accelerators and Beams
Studentship Projects
Project Reference | Relationship | Related To | Start | End | Student Name |
---|---|---|---|---|---|
ST/N504129/1 | 01/10/2015 | 31/03/2021 | |||
1643595 | Studentship | ST/N504129/1 | 01/10/2015 | 31/03/2019 | Alex HERROD |
Description | A new method of modelling electric and magnetic fields in a an accelerator bend. Confirmatory simulation studies of several aspects of beam behaviour in the Fermilab Muon g-2 Experiment. |
Exploitation Route | Precision particle beam machines will be able to use this research to better model behaviour in bends with complicated fields. |
Sectors | Other |
URL | https://livrepository.liverpool.ac.uk/3082300/ |