This thesis evaluates the suitability of Thorium(Th) ions for optical spectroscopic measurements in a Paul trap. A $ sp{232}Th$ sample, placed near the ring electrode, is evaporated with a Nd:YAG laser pulse and then selectively ionized by a synchronized dye laser pulse. Ions created inside the trap follow stable orbits and are cooled by hydrogen buffer gas. / The stability and trapping efficiency for the ions are examined at various trap operating conditions. The motion of the ions in the trap is studied with particular attention to volume occupied by the ions in the phase space. With the trap operating at optimum conditions for stability and spectral resolution, laser-induced fluorescence measurements at selected rf phase angles are applied to five optical transitions of Th ions. Results indicate that two transitions are most suitable for spectroscopic studies and 60-80 ions are required to produce a spectrum with signal-to-background ratio of 1:1.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.27299 |
| Date | January 1997 |
| Creators | Cheng, Hongmei. |
| Contributors | Lee, Jonathan K. P. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Physics.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001571099, proquestno: MQ29674, Theses scanned by UMI/ProQuest. |
Page generated in 0.0013 seconds