Evaporative cooling of an atomic beam
Year: 2000
Authors: Mandonnet E., Minguzzi A., Dum R., Carusotto I., Castin Y., Dalibard J.
Autors Affiliation: Laboratoire Kastler Brossel, 75005 Paris, 24 rue Lhomond, France; INFM, Scuola Normale Superiore, 56126 Pisa, Piazza dei Cavalieri 7, Italy.
Abstract: We present a theoretical analysis of the evaporative cooling of an atomic beam propagating in a magnetic guide. Cooling is provided by transverse evaporation. The atomic dynamics inside the guide is analyzed by solving the Boltzmann equation with two different approaches: an approximate analytical ansatz and a Monte-Carlo simulation. Within their domain of validity, these two methods are found to be in very good agreement with each other. They allow us to determine how the phase-space density and the flux of the beam vary along its direction of propagation. We find a significant increase for the phase-space density along the guide for realistic experimental parameters. By extrapolation, we estimate the length of the beam needed to reach quantum degeneracy.
Journal/Review: EUROPEAN PHYSICAL JOURNAL D
Volume: 10 (1) Pages from: 9 to: 18
KeyWords: Bose-einstein Condensation; Output Coupler; Laser; Gas; NumberDOI: 10.1007/s100530050521Citations: 59data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-20References taken from IsiWeb of Knowledge: (subscribers only)