The Canadian Penning trap Mass Spectrometer (CPTMS) was reassembled and commissioned at Argonne National Laboratory. It consists of three systems: a laser desorption ion source, used for stable isotope production; a radio-frequency quadrupole ion trap (Paul trap); and a Penning trap, which sits inside a homogeneous 6 Tesla magnetic field. The CPTMS was tested using gold ions: these were accelerated toward the Paul trap, where they were accumulated and cooled down. They were then sent to the Penning trap, in which ions undergo circular motion. These motions were resonantly excited using an RF dipole electric field, and the resonant frequency was measured as a minimum in time-of-flight of the ejected ions as they were led to a region of low magnetic field, converting their cyclotron energy to axial kinetic energy. The apparatus was found to be operational: multiple-bunch accumulation was observed for the first time in a Paul trap, and the Fourier limited frequency resolution of 2 x 10--6 was attained for a one second excitation time in the Penning trap.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.21604 |
| Date | January 1998 |
| Creators | Martinez, Pedro. |
| 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: 001654930, proquestno: MQ50831, Theses scanned by UMI/ProQuest. |
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