D'Arcy, RTP;
(2013)
Optimisation of the COMET experiment to search for charged lepton flavour violation and a new simulation to study the performance of the EMMA FFAG accelerator.
Doctoral thesis (PhD), UCL (University College London).
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Abstract
The particle tracking software package, GPT, has been developed and utilised to simulate the beam optics of the EMMA injection line and ring, constructed at the Daresbury Laboratory, UK. EMMA is a proof-of-principle machine for a new type of accelerator: a non-scaling fixed-field alternating gradient (ns-FFAG) accelerator. As such the beam dynamics of the magnetic lattice require benchmarking, with GPT chosen for its space-charge self-field simulation package. Tune and time-of-flight measurements have been successfully simulated and compared to experimental data, recorded during the first few runs of the machine. Measurements confirm the successful operation of EMMA as a ns-FFAG accelerator and simulations highlight that space-charge effects are observable in the EMMA bunch-charge and energy regime. Such accelerators have many applications within and outside particle physics, ranging from cancer therapy and accelerator driven thorium reactors to neutrino factories and muon colliders. The application of FFAGs and the design of the COMET/PRISM experiment, which is seeking to measure muon-to-electron conversion at the 10^−18 level, is investigated. Simulations of the COMET experiment, staged in two phases, have been performed with a focus on optimisation of the stopping target design. A number of geometries have been tested, with a cone then disk structure preferred for Phase-I then Phase-II respectively. Initial data from the COMET precursor experiment, MuSIC, have also been analysed and successfully compared to simulation.
| Type: | Thesis (Doctoral) |
|---|---|
| Qualification: | PhD |
| Title: | Optimisation of the COMET experiment to search for charged lepton flavour violation and a new simulation to study the performance of the EMMA FFAG accelerator |
| Open access status: | An open access version is available from UCL Discovery |
| Language: | English |
| UCL classification: | 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/1387440 |
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