Discrete-step evaporation of an atomic beam - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue The European Physical Journal D : Atomic, molecular, optical and plasma physics Année : 2005

Discrete-step evaporation of an atomic beam

Résumé

We present a theoretical analysis of the evaporative cooling of a magnetically guided atomic beam by means of discrete radio-frequency antennas. First we derive the changes in flux and temperature, as well as in collision rate and phase-space density, for a single evaporation step. Next we show how the occurrence of collisions during the propagation between two successive antennas can be probed. Finally, we discuss the optimization of the evaporation ramp with several antennas to reach quantum degeneracy. We estimate the number of antennas required to increase the phase-space density by several orders of magnitude. We find that at least 30 antennas are needed to gain a factor $10^8$ in phase-space density.

Mots clés

Fichier principal
Vignette du fichier
evaporation_revised.pdf (248.17 Ko) Télécharger le fichier
Loading...

Dates et versions

hal-00002809 , version 1 (09-09-2004)
hal-00002809 , version 2 (12-04-2005)

Identifiants

Citer

Thierry Lahaye, David Guéry-Odelin. Discrete-step evaporation of an atomic beam. The European Physical Journal D : Atomic, molecular, optical and plasma physics, 2005, 33, pp.67-75. ⟨10.1140/epjd/e2005-00007-y⟩. ⟨hal-00002809v2⟩
123 Consultations
116 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More