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A continuous cold atomic beam from a magneto-optical trap |
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| Authors: | L Cacciapuoti A Castrillo M de Angelis GM Tino |
| Institution: | (1) Dipartimento di Scienze Fisiche, Università degli Studi di Napoli “Federico II” and Istituto Nazionale per la Fisica della Materia (INFM), Complesso Universitario di Monte S. Angelo, via Cintia, 80126 Napoli, Italy, IT;(2) Istituto di Cibernetica del CNR, via Toiano 6, 80072 Arco Felice, Italy, IT;(3) Dipartimento di Fisica, Università di Firenze, largo E. Fermi 2, 50125 Firenze, Italy, IT |
| Abstract: | We have developed and characterized a new method to produce a continuous beam of cold atoms from a standard vapour-cell magneto-optical trap (MOT). The experimental apparatus is very simple. Using a single laser beam it is possible to hollow out in the source MOT a direction of unbalanced radiation pressure along which cold atoms can be accelerated out of the trap. The transverse cooling process that takes place during the extraction reduces the beam divergence. The atomic beam is used to load a magneto-optical trap operating in an ultra-high vacuum environment. At a vapour pressure of 10-8mbar in the loading cell, we have produced a continuous flux of 7×107atoms/s at the recapture cell with a mean velocity of 14 m/s. A comparison of this method with a pulsed transfer scheme is presented. Received 19 February 2001 |
| Keywords: | PACS 32 80 Pj Optical cooling of atoms trapping – 42 50 Vk Mechanical effects of light on atoms molecules electrons and ions |
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