AI Article Synopsis
- The study presents a setup that combines a discharge source generating supersonic beams of metastable helium (He) atoms with a magneto-optical trap (MOT) for ultracold lithium (Li) atoms, enabling the investigation of Penning and associative ionization at high ion counts.
- * The researchers employ a new ion detection method that effectively allows for mass selection, high extraction efficiency, and precise collision-energy measurements of the cationic products.
- * The impact of He-Li collisions on the Li atom population in the MOT is examined, allowing for the estimation of the discharge source's excitation efficiency and facilitating temperature probing of the Li cloud through Penning collisions without additional detection methods.*
Article Abstract
We describe an experimental setup comprised of a discharge source for supersonic beams of metastable He atoms and a magneto-optical trap (MOT) for ultracold Li atoms that makes it possible to study Penning ionization and associative ionization processes at high ion count rates. The cationic reaction products are analyzed using a novel ion detection scheme which allows for mass selection, a high ion extraction efficiency, and a good collision-energy resolution. The influence of elastic He-Li collisions on the steady-state Li atom number in the MOT is described, and the collision data are used to estimate the excitation efficiency of the discharge source. We also show that Penning collisions can be directly used to probe the temperature of the Li cloud without the need for an additional time-resolved absorption or fluorescence detection system.
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| http://dx.doi.org/10.1063/1.5063709 | DOI Listing |
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