(1996). Kinetic theory of the evaporative cooling of a trapped gas. Physical Review A, (53), 381. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. We apply kinetic theory to the problem of evaporative cooling of a dilute collisional gas in a trap. Assuming ''sufficient ergodicity'' ͑phase-space distribution only a function of energy͒ and s-wave collisions with an energy-independent cross section, an equation for the evolution of the energy distribution of trapped atoms is derived for arbitrary trap shapes. Numerical integration of this kinetic equation demonstrates that during evaporation the gas is accurately characterized by a Boltzmann distribution of atom energies, truncated at the trap depth. Adopting the assumption of a truncated Boltzmann distribution, closed expressions are obtained for the thermodynamic properties of the gas as well as for the particle and energy loss rates due to evaporation. We give analytical expressions both for power-law traps and for a realistic trapping potential ͑Ioffe quadrupole trap͒. As an application, we discuss the evaporative cooling of trapped atomic hydrogen gas.

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Decay kinetics and Bose condensation in a gas of spin-polarized triplet He(2macht3S) Shlyapnikov, G.V.; Walraven, J.T.M.; Rachmanov, U.M.; Reynolds, M.W.

Adiabatically changing the phase-space density of a trapped Bose gas Pinkse, P.J.M.; Mosk, A.J.; Weidemuller, M.; Reynolds, M.W.; Hijmans, T.W.; Walraven, J.T.M.