Cooling mechanisms in the sodium type-II magneto-optical trap

Oien, A. M. L.; McKinnie, I.T.; Manson, P. J.; Sandle, W. J.; Warrington, D. M.

doi:10.1103/physreva.55.4621

Cited by 13 publications

(11 citation statements)

References 14 publications

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“…We also note that for cooling in dimensions of 2 or more, modulation of the magnetic field and polarization may not be necessary to remix hyperfine states, simplifying the magnetic coil design. Type II atomic MOTs operate with similar level structures, and remixing occurs from lasers propagating in orthogonal directions (29).…”

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confidence: 99%

2D Magneto-Optical Trapping of Diatomic Molecules

et al. 2013

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We demonstrate one- and two-dimensional transverse laser cooling and magneto-optical trapping of the polar molecule yttrium (II) oxide (YO). In a 1D magneto-optical trap (MOT), we characterize the magneto-optical trapping force and decrease the transverse temperature by an order of magnitude, from 25 to 2 mK, limited by interaction time. In a 2D MOT, we enhance the intensity of the YO beam and reduce the transverse temperature in both transverse directions. The approach demonstrated here can be applied to many molecular species and can also be extended to 3D.

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confidence: 99%

2D Magneto-Optical Trapping of Diatomic Molecules

et al. 2013

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“…The dark state population must be rapidly returned to bright states to allow significant cooling and confinement. Typically, MOTs based on type-II structures are observed to yield weaker confining forces and higher temperatures than those using a type-I structure [18,19].…”

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confidence: 99%

Submillikelvin Dipolar Molecules in a Radio-Frequency Magneto-Optical Trap

et al. 2016

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We demonstrate a scheme for magneto-optically trapping strontium monofluoride (SrF) molecules at temperatures one order of magnitude lower and phase space densities 3 orders of magnitude higher than obtained previously with laser-cooled molecules. In our trap, optical dark states are destabilized by rapidly and synchronously reversing the trapping laser polarizations and the applied magnetic field gradient. The number of molecules and trap lifetime are also significantly improved from previous work by loading the trap with high laser power and then reducing the power for long-term trapping. With this procedure, temperatures as low as 400 μK are achieved.

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“…The MOT is vapor-loaded from a hot neutral Na source. The atoms can be trapped using two different hyperfine transitions, the so-called type-I and type-II MOTs [41,42]. The type-I MOT is made by tuning the MOT laser to the F = 2 → F ′ = 3 transition.…”

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confidence: 99%

Measurement of charge exchange between Na and Ca+ in a hybrid trap

et al. 2019

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We present measurements of the charge-exchange reaction rate between neutral sodium (Na) and ionized calcium (Ca + ) in a hybrid atom-ion trap, which is comprised of a Na magneto-optical trap concentric with a linear Paul trap. Once the Na and Ca + are co-trapped, the reaction rate is measured by continuously quenching the reaction product Na + from the ion trap, and then destructively measuring the decay of the remaining ion population. The reactants' electronic state and temperature are experimentally controlled, allowing us to determine the four individual reactionrates between Na[S or P] and Ca + [S or D] at different collision energies. With the exception of the largest reaction-rate channel (Na[S] + Ca + [D]), our rates agree with classical Langevin rate limit. We have also found evidence of reactant collision-energy thresholds associated with two of the four entrance-channels.

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Cooling mechanisms in the sodium type-II magneto-optical trap

Cited by 13 publications

References 14 publications

2D Magneto-Optical Trapping of Diatomic Molecules

2D Magneto-Optical Trapping of Diatomic Molecules

Submillikelvin Dipolar Molecules in a Radio-Frequency Magneto-Optical Trap

Measurement of charge exchange between Na and Ca+ in a hybrid trap

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