Hof, Rutger (2019) Slow molecular beams from a cryogenic buffer gas source. Master's Thesis / Essay, Physics.
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Abstract
The NL-eEDM collaboration aims to measure the electric dipole moment (EDM) of the electron with a precision which improves on the most recent measurement of this quantity by an order of magnitude, setting more stringent limits on extensions to the Standard Model of particle physics in the process. The proposed experiment requires a beam of diatomic molecules (BaF), and in order to minimize the associated statistical uncertainty in the EDM the (forward) velocity of these molecules should be minimized while at the same time maximizing the number of molecules which reach the interaction zone after a deceleration and laser cooling stage. This work describes the source built for this purpose, which is known as a cryogenic buffer gas source. The expected behavior of the molecular beam in the typical operating range of the relevant experimental parameters is discussed, as well as some technical details pertaining to the source and the different detection methods employed. Recommendations are made in order to match the (phase-space) output of the source to the acceptance of the decelerator. The behavior of the molecular beam is described both qualitatively and quantitatively as a function of the main experimental parameters.
| Item Type: | Thesis (Master's Thesis / Essay) |
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| Supervisor name: | Hoekstra, S. and Vecchi, M. |
| Degree programme: | Physics |
| Thesis type: | Master's Thesis / Essay |
| Language: | English |
| Date Deposited: | 17 Jan 2020 14:01 |
| Last Modified: | 17 Jan 2020 14:01 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/21420 |
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