The potential depth of a magneto-optical trap for neutral lithium atoms has been measured to be 0.38 K with a new method in which the escape velocity of laser heated atoms is measured by observing the Doppler shift of the fluorescence. The decay rate constant for the trapped atoms due to ultra-cold collision has been determined to be 1.0 X 10-11 cm3/s, showing no discrepancy with the existing theory based on the fine structure changing collisions.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIEOct 28, 19920 citations

Light-induced atomic desorption of lithium

Daniel S. Barker, Eric B. Norrgard, Julia K. Scherschligt +2 more

arXiv:1805.09862Physical Review AOct 8, 201819 citations

Applied Physics B

Decay rate measurement of lithium in a magneto-optical trap

Junji Kawanaka, Kazuko Shimizu, Hiroshi Takuma

Published Aug 1, 1993• 6 citations

Publisher

DOI: 10.1007/bf00425994

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Light-induced atomic desorption of lithium

Daniel S. Barker, Eric B. Norrgard, Julia K. Scherschligt +2 more

We demonstrate loading of a Li magneto-optical trap using light-induced atomic desorption. The magneto-optical trap confines up to approximately $4\ifmmode\times\else\texttimes\fi{}{10}^{4}$ $^{7}\mathrm{Li}$ atoms with loading rates up to approximately $4\ifmmode\times\else\texttimes\fi{}{10}^{3}$ atoms per second. We study the Li desorption rate as a function of the desorption wavelength and power. The extracted wavelength threshold for desorption of Li from fused silica is approximately 470 nm. In addition to desorption of lithium, we observe light-induced desorption of background gas molecules. The vacuum pressure increase due to the desorbed background molecules is $\ensuremath{\lesssim}50\phantom{\rule{0.16em}{0ex}}%$, and the vacuum pressure decreases back to its base value with characteristic timescales on the order of seconds when we extinguish the desorption light. By examining both the loading and decay curves of the magneto-optical trap, we are able to disentangle the trap decay rates due to background gases and desorbed lithium. Our results show that light-induced atomic desorption can be a viable Li vapor source for compact devices and sensors.We demonstrate loading of a Li magneto-optical trap using light-induced atomic desorption. The magneto-optical trap confines up to approximately $4\ifmmode\times\else\texttimes\fi{}{10}^{4}$ $^{7}\mathrm{Li}$ atoms with loading rates up to approximately $4\ifmmode\times\else\texttimes\fi{}{10}^{3}$ atoms per second. We study the Li desorption rate as a function of the desorption wavelength and power. The extracted wavelength threshold for desorption of Li from fused silica is approximately 470 nm. In addition to desorption of lithium, we observe light-induced desorption of background gas molecules. The vacuum pressure increase due to the desorbed background molecules is $\ensuremath{\lesssim}50\phantom{\rule{0.16em}{0ex}}%$, and the vacuum pressure decreases back to its base value with characteristic timescales on the order of seconds when we extinguish the desorption light. By examining both the loading and decay curves of the magneto-optical trap, we are able to disentangle the trap decay rates due to background gases and desorbed lithium. Our results show that light-induced atomic desorption can be a viable Li vapor source for compact devices and sensors.

arXiv:1805.09862Physical Review AOct 8, 201819 citations

We demonstrate loading of a Li magneto-optical trap using light-induced atomic desorption. The magneto-optical trap confines up to approximately $4\ifmmode\times\else\texttimes\fi{}{10}^{4}$

^{7}\mathrm{Li}

atoms with loading rates up to approximately $4\ifmmode\times\else\texttimes\fi{}{10}^{3}$ atoms per second. We study the Li desorption rate as a function of the desorption wavelength and power. The extracted wavelength threshold for desorption of Li from fused silica is approximately 470 nm. In addition to desorption of lithium, we observe light-induced desorption of background gas molecules. The vacuum pressure increase due to the desorbed background molecules is $\ensuremath{\lesssim}50\phantom{\rule{0.16em}{0ex}}%$, and the vacuum pressure decreases back to its base value with characteristic timescales on the order of seconds when we extinguish the desorption light. By examining both the loading and decay curves of the magneto-optical trap, we are able to disentangle the trap decay rates due to background gases and desorbed lithium. Our results show that light-induced atomic desorption can be a viable Li vapor source for compact devices and sensors.