Increase of the barium ion-trap lifetime via photodissociation
| Autor: | Hao Wu, Michael Mills, Elizabeth West, Michael C. Heaven, Eric R. Hudson |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Physical Review A. 104 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.104.063103 |
| Popis: | The lifetime of Ba$^+$ ions confined in a Paul trap is found, under typical conditions, to be limited by chemical reactions with residual background gas. An integrated ion trap and time-of-flight mass spectrometer are used to analyze the reactions of the trapped Ba$^+$ ions with three common gases in an ultrahigh vacuum system (H$_2$, CO$_2$ and H$_2$O). It is found that the products of these reactions can all be photodissociated by a single ultraviolet laser at 225~nm, thereby allowing the recovery of the Ba$^+$ ions and leading to an increase of the effective trap lifetime. For a Coulomb crystal, the lifetime increased from roughly 6~hours to 2~days at room temperature. It is suggested that higher enhancement factors are possible in systems with stronger traps. In addition, photodissociation wavelengths for other common trapped ion systems are provided. Comment: 6 pages, 4 figures, 1 table |
| Databáze: | OpenAIRE |
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