An exploration of the production of negative ions from neutral gases using a negative hydrogen ion source driver
| dc.contributor.author | Paul, Andrew | |
| dc.contributor.supervisor | Junginger, Tobias | |
| dc.date.accessioned | 2024-01-04T18:23:54Z | |
| dc.date.available | 2024-01-04T18:23:54Z | |
| dc.date.copyright | 2024 | en_US |
| dc.date.issued | 2024-01-04 | |
| dc.degree.department | Department of Physics and Astronomy | en_US |
| dc.degree.level | Master of Science M.Sc. | en_US |
| dc.description.abstract | Negative ion beams have wide-ranging applications from acceleration in cyclotrons for medical radioisotope production to areas where tandem accelerators are leveraged. The fields in which tandem accelerators are used include nuclear structure research, environ- mental studies, materials characterization, medical treatments and ion implantation in semiconductor devices. A commercially important case where negative helium ions are utilized is in the semiconductor industry where they are conventionally created by double- charge exchange ion sources using metallic vapours (typically Alkali’s). These metallic vapours lead to challenges such as contamination, electrical shorts, and maintenance difficulties. In an effort to overcome the significant disadvantage of metallic vapour charge exchange, this thesis will firstly investigate the production of negative helium ions using a non-metallic charge exchange method in which negative hydrogen ions will be impinged upon neutral helium gas. A charge exchange cell is developed for this project which includes an electrostatic accelerator to accelerate newly produced negative ions from the target gas. The main objective focuses on negative helium ion production but the method is applied to different gas targets including H2, CO2, and O2 with the goal of accelerating and measuring negative ions that are the products of these targets. This approach aims to avoid the significant contamination issues from the metallic vapour double-charge ex- change method and explore novel methods for negative ion production via charge transfer. | en_US |
| dc.description.scholarlevel | Graduate | en_US |
| dc.identifier.uri | http://hdl.handle.net/1828/15785 | |
| dc.language | English | eng |
| dc.language.iso | en | en_US |
| dc.rights | Available to the World Wide Web | en_US |
| dc.subject | Ion source | en_US |
| dc.subject | Negative ion beam | en_US |
| dc.subject | Electrostatic accelerator | en_US |
| dc.subject | Charge exchange | en_US |
| dc.title | An exploration of the production of negative ions from neutral gases using a negative hydrogen ion source driver | en_US |
| dc.type | Thesis | en_US |