Chopra, Ashwin Kumar;
(2019)
Construction and commissioning of the tracker for the SuperNEMO Demonstrator Module and Unfolding the 2νββ spectrum of 100Mo from the NEMO-3 experiment.
Doctoral thesis (Ph.D), UCL (University College London).
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Abstract
The SuperNEMO experiment will search for the neutrinoless double beta decay of 82Se, with an expected half-life sensitivity of >10^26 years. The first stage of the experiment, the SuperNEMO Demonstrator Module, is expected to achieve a half-life sensitivity of 6.6×10^24 years after running for 2.5 years with 7 kg of source isotope. Key results from the construction, and commissioning of the wire tracker for the Demonstrator Module are described, and the drift distance-time relationship of each of the first three quarters measured. The two-neutrino double-beta decay half-life of 100Mo has been measured as 7.01±0.01(stat)±0.46\(syst)×10^18 years using a sample of 6914 g of isotope measured for 5.25 years by the precursor experiment, NEMO-3. The summed electron energy spectrum was unfolded, allowing for a limit of -1.12×10^-1 < å³_of < 6.95×10^-2 MeV to be placed on the Lorentz Violating operator å³_of. A further unfolded distribution in the three dimensions of summed energy, energy asymmetry, and the opening angle of the emitted electrons has been produced, allowing subsequent experiment-agnostic analyses.
| Type: | Thesis (Doctoral) |
|---|---|
| Qualification: | Ph.D |
| Title: | Construction and commissioning of the tracker for the SuperNEMO Demonstrator Module and Unfolding the 2νββ spectrum of 100Mo from the NEMO-3 experiment |
| Event: | UCL (University College London) |
| Open access status: | An open access version is available from UCL Discovery |
| Language: | English |
| Additional information: | Copyright © The Author 2019. Original content in this thesis is licensed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) Licence (https://creativecommons.org/licenses/by/4.0/). Any third-party copyright material present remains the property of its respective owner(s) and is licensed under its existing terms. Access may initially be restricted at the author’s request. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10070180 |
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