Cooling mechanisms in potassium magneto-optical traps |
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| Authors: | C Fort A Bambini L Cacciapuoti FS Cataliotti M Prevedelli GM Tino M Inguscio |
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| Institution: | (1) INFM - Dipartimento di Fisica and European Laboratory for Nonlinear Spectroscopy (L.E.N.S.), Università di Firenze Largo E. Fermi, 2, 50125 Firenze, Italy, IT;(2) Istituto di Elettronica Quantistica, Consiglio Nazionale delle Ricerche via Panciatichi 56/30, 50127 Firenze, Italy, IT |
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| Abstract: | We report on a theoretical and experimental investigation of 39K magneto-optical trapping. The small hyperfine splitting characterizing the upper level of the cooling transition affects
the cooling mechanism. In order to model the atom-laser interaction, the whole level structure of the D2 line has to be taken into account. Two different regimes have been recognized, one optimizing the loading of the trap, the
second minimizing the temperature of the atoms. We investigated these two regimes experimentally and found results in agreement
with the theoretical predictions.
Received: 6 March 1998 / Received in final form: 13 May 1998 / Accepted: 13 May 1998 |
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| 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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