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Manipulation d'atomes d'hélium métastable par laser: effet Sisyphe magnétique

Olivier Emile 1
1 Département Milieux Divisés
LSH-ENS - Laboratoire de Spectroscopie Hertzienne de l'ENS
Abstract : This dissertation presents the study of the cooling of atoms in the presence of a small transverse magnetic field (magnetically assisted Sisyphus effect) on a J = 1 → J' = 1 transition. The first part is dedicated to the optimization of a supersonic metastable helium beam that we used for our cooling experiments. The optimization of the beam in the purpose of trapping atoms in a magneto-optical trap is also described. The second part deals with the magnetically assisted Sisyphus effect on metastable helium. After a qualitative discussion on the magnetically assisted Sisyphus effect, we present experimental results supported by detailled theoretical calculations.
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Submitted on : Thursday, March 9, 2006 - 1:17:24 PM
Last modification on : Thursday, December 10, 2020 - 12:37:14 PM
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  • HAL Id : tel-00011888, version 1


Olivier Emile. Manipulation d'atomes d'hélium métastable par laser: effet Sisyphe magnétique. Physique Atomique [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 1993. Français. ⟨tel-00011888⟩



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