Experimental single-impulse magnetic focusing of launched cold atoms
نویسندگان
چکیده
منابع مشابه
Experimental Single-Impulse Magnetic Focusing of Launched Cold Atoms
Three-dimensional magnetic focusing of cold atoms with a single magnetic impulse has been observed for the first time. We load 7×10 Rb atoms into a magneto-optical trap, precool the atoms with optical molasses, then use moving molasses to launch them vertically through 20.5 cm to the apex of flight. In transit the atoms are optically pumped, prior to the single magnetic lens impulse that occurs...
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We have theoretically investigated the focusing of a launched cloud of cold atoms. Time-dependent spatially-varying magnetic fields are used to impart impulses leading to a three-dimensional focus of the launched cloud. We discuss possible coil arrangements for a new focusing regime: isotropic 3D focusing of atoms with a single magnetic lens. We investigate focusing aberrations and find that, f...
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We have theoretically investigated 3D focusing of a launched cloud of cold atoms using a pair of magnetic lens pulses (the alternate-gradient method). Individual lenses focus radially and defocus axially or vice-versa. The performance of the two possible pulse sequences are compared and found to be ideal for loading both ‘pancake’ and ‘sausage’ shaped magnetic/optical microtraps. It is shown th...
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We propose the novel combination of a laser guide and magnetic lens to transport a cold atomic cloud. We have modelled the loading and guiding of a launched cloud of cold atoms with the optical dipole force. We discuss the optimum strategy for loading typically 30 % of the atoms from a MOT and guiding them vertically through 22 cm. However, although the atoms are tightly confined transversely, ...
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Magnetic trapping of bromine atoms at temperatures in the millikelvin regime is demonstrated for the first time. The atoms are produced by photodissociation of Br2 molecules in a molecular beam. The lab-frame velocity of Br atoms is controlled by the wavelength and polarization of the photodissociation laser. Careful selection of the wavelength results in one of the pair of atoms having suffici...
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ژورنال
عنوان ژورنال: Journal of Physics B: Atomic, Molecular and Optical Physics
سال: 2008
ISSN: 0953-4075,1361-6455
DOI: 10.1088/0953-4075/41/12/125302