Tickle, Steven
(2023)
Normalisation of the Mu2e Stopping Target Monitor using HPGe Gamma-Ray Spectrometers.
PhD thesis, University of Liverpool.
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200868169_Oct2023.pdf - Author Accepted Manuscript Download (93MB) | Preview |
Abstract
The search for charged lepton flavour violation has so far returned negative results up to a branching limit of 4.2 times 10^-13 most recently at the Mu to E Gamma (MEG) experiment in 2016. The area of high luminosity physics on the precision frontier surrounding muon experiments provides a window into testing for new physics with stronger coupling to heavier particles. With the recent 4.2 sigma deviation from the Standard Model at the g-2 experiment at FNAL, the prospects of new decays and interactions relating to expanding the electroweak sector targeting heavy leptons are looking promising for examination. Here, we examine the deployment of the Mu2e stopping target monitor for the use of normalising signals in order to calculate branching ratios for decays. The chosen technology is high purity germanium crystals (HPGe) which are used to measure distinct gamma-ray flashes that correspond to energy transitions within the stopping targets which are characteristic of the number of stopped muons. Liverpool University provides the HPGe detectors, including testing, calibration, installation and support, for the Mu2e experiment to quantify these stopped muons by measuring target photon counts above 100kHz. It was found that the data acquisition (DAQ) system at Liverpool, despite data losses, maintained the ability to measure at the rates quoted at Fermilab exceeding 100kHz.
| Item Type: | Thesis (PhD) |
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| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 30 Jan 2024 14:06 |
| Last Modified: | 30 Jan 2024 14:07 |
| DOI: | 10.17638/03176485 |
| Supervisors: |
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| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3176485 |
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