The Construction and Commissioning of the Straw Tracking Detector in the New Muon g-2 Experiment at Fermilab



Turner, W
(2018) The Construction and Commissioning of the Straw Tracking Detector in the New Muon g-2 Experiment at Fermilab. PhD thesis, University of Liverpool.

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Abstract

The anomalous magnetic moments of leptons have been a long standing test of the standard model of particle physics as they can be both measured experimentally and predicted theoretically with high precision. In particular the anomalous magnetic moment of the muon, aμ, has been favoured due to its sensitivity to new physics effects. Currently the world’s best measurement of aμ was made at Brookhaven National Laboratory (BNL) in 2001 which resulted in a 3σ deviation between the experimental measurement and theoretical prediction. Since this measurement a number of improvements have been made to the theoretical prediction giving a deviation between theoretical prediction and measured value of over 3.5σ. A new experimental effort has been set up at Fermi National Laboratory (FNAL) in order to measure aμ with a factor of four reduction in the experimental uncertainties. If these aims are met and the central measurement value stays the same a discrepancy will be discovered providing strong evidence for new physics effects. The FNAL experiment uses the same experimental method as BNL which centres around measuring the precession of the μ+ spin after circling an extremely precise magnetic storage ring. To reduce the experimental uncertainties in the new experiment straw tracking detectors have been constructed and installed into the Fermilab muon g-2 storage ring. These detectors measure the stored muon beam profile throughout each fill and enable key independent cross checks of the calorimeter detector systems. This body of work presents the design, construction, testing, installation and commissioning of the straw tracking detectors as well as the ability to match the straw tracker tracks and calorimeter clusters with a focus on measuring the calorimeter pileup rate.

Item Type: Thesis (PhD)
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 30 Nov 2018 13:45
Last Modified: 26 May 2021 07:11
DOI: 10.17638/03028553
Supervisors:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3028553