We propose to use a three-step transverse and longitudinal cooling scheme, to compress and collimate a strongly diverging flow of metastable rare gas atoms. Simulations show that an atom beam flux of 1010 8-1 in a small diameter (<1 mm), well-collimated (divergence <10 mrad), slow (50 ms-1 ) atomic beam could be achieved. This technique can be extremely valuable in many areas of atomic physics, e.g. in (electron) spectroscopy and atomic collision physics where high beam densities are desirable.We propose to use a three-step transverse and longitudinal cooling scheme, to compress and collimate a strongly diverging flow of metastable rare gas atoms. Simulations show that an atom beam flux of 1010 8-1 in a small diameter (<1 mm), well-collimated (divergence <10 mrad), slow (50 ms-1 ) atomic beam could be achieved. This technique can be extremely valuable in many areas of atomic physics, e.g. in (electron) spectroscopy and atomic collision physics where high beam densities are desirable.

Australian Journal of PhysicsApr 1, 199621 citations

Atomic Collisions in Ultracold Atomic Gases

Paul S. Julienne, Kevin C. Jones, Paul D. Lett +4 more

Jul 1, 19970 citations

Laser cooling of a magnetically guided ultracold atom beam

A Aghajani-Talesh, M Falkenau, Valentin Volchkov +3 more

We report on the transverse laser cooling of a magnetically guided beam of ultracold chromium atoms. Radial compression by a tapering of the guide is employed to adiabatically heat the beam. Inside the tapered section, heat is extracted from the atom beam by a two-dimensional (2D) optical molasses perpendicular to it, resulting in a significant increase in atomic phase space density. A magnetic offset field is applied to prevent optical pumping to untrapped states. Our results demonstrate that, by a suitable choice of the magnetic offset field, the cooling beam intensity and detuning, atom losses and longitudinal heating can be avoided. Final temperatures below 65 μK have been achieved, corresponding to an increase in phase space density in the guided beam by more than a factor of 30.We report on the transverse laser cooling of a magnetically guided beam of ultracold chromium atoms. Radial compression by a tapering of the guide is employed to adiabatically heat the beam. Inside the tapered section, heat is extracted from the atom beam by a two-dimensional (2D) optical molasses perpendicular to it, resulting in a significant increase in atomic phase space density. A magnetic offset field is applied to prevent optical pumping to untrapped states. Our results demonstrate that, by a suitable choice of the magnetic offset field, the cooling beam intensity and detuning, atom losses and longitudinal heating can be avoided. Final temperatures below 65 μK have been achieved, corresponding to an increase in phase space density in the guided beam by more than a factor of 30.

arXiv:1002.0233New Journal of PhysicsJun 28, 20109 citations

Theory of atomic collisions at ultracold temperatures

Paul S. Julienne, Robert Heather, J. Vigué

AIP conference proceedingsJan 1, 19911 citation

Experiments in ultracold collisions

P. L. Gould

Embedded and Ubiquitous ComputingJan 1, 19920 citations

Direct Magneto-Optical Compression of an Effusive Atomic Beam for Application in a High-Resolution Focused Ion Beam

G. ten Haaf, T. C. H. de Raadt, G. P. Offermans +4 more

Photoionizing a beam of ultracold atoms can provide a high-brightness ion beam, to improve resolution in focused-ion-beam nanofabrication. With this aim, the authors use laser cooling and compression to give a ${}^{85}$ Rb atomic beam an equivalent brightness better than the current standard for the semiconductor industry. This could represent an important step toward smaller feature sizes in integrated circuits.Photoionizing a beam of ultracold atoms can provide a high-brightness ion beam, to improve resolution in focused-ion-beam nanofabrication. With this aim, the authors use laser cooling and compression to give a ${}^{85}$Rb atomic beam an equivalent brightness better than the current standard for the semiconductor industry. This could represent an important step toward smaller feature sizes in integrated circuits.

arXiv:1612.01883Physical Review AppliedMay 22, 201713 citations

{}^{85}

Rb atomic beam an equivalent brightness better than the current standard for the semiconductor industry. This could represent an important step toward smaller feature sizes in integrated circuits.