Caracterização de uma armadilha magneto-optica para átomos de sódio em célula de vapor. / Characterization of a magneto-optical trap for sodium atoms in vapor cell.

AUTOR(ES)

Debora Marcondes Bastos Pereira Milori

DATA DE PUBLICAÇÃO

1994

RESUMO

Among the various atomic motion control techniques using radiation pressure magneto-optic trapping has been looked at with great enthusiasm because it produces samples of cold atoms (temperatures about μK), with high densities and confined in small regions of space. Due to these motivations the efforts for developing and characterizing these atoms traps has been high. Once the atom is captured by the magneto-optic trap, it goes through an intense process of desacceleration via Doppler Effect and ends up confined in the potential well genered by the interaction with the magnetically Field. The number and the density of the trapped atoms, the size of the cloud and the loading process are strongly related to trap parameters, such as: magnetic Field gradient, laser beam intensity and background vapor temperature. This work deals with the characterization of a trap of this kind for sodium atoms through a systematic study, in order to discover the conditions for a better performance. At the same time theoretical models are developed in order to understand in depth the atomic forces involved in the production of a new kind of material which is this highly refrigerated gas.

ASSUNTO(S)

sódio armadilha magneto-óptica magneto-optical trap sodium Átomos frios cold atoms

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