Three-wire magnetic trap for direct forced evaporative cooling

Evaporative cooling at low trap depth

Evaporative cooling in a radio-frequency trap

A theoretical investigation for implementing a scheme of forced evaporative cooling in radio-frequency rf adiabatic potentials is presented. Supposing the atoms to be trapped in a combination of a dc magnetic field and a rf field at frequency 1, the cooling procedure is facilitated using a second rf source at frequency 2. This second rf field produces a controlled coupling between the spin stat...

Evaporative Cooling of Actuators for Humanoid Robots

Autonomous humanoid robots need high torque actuators to be able to walk and run. One problem in this context is the heat generated. In this paper we propose to use water evaporation to improve cooling of the motors. Simulations based on thermodynamic calculations as well as measurements on real actuators show that, under the assumption of the load of a soccer game, cooling can be considerably ...

An analytical model for evaporative cooling

We have developed an analytical model for evaporative cooling [1]. By simulating evaporation as a sequence of discrete steps, we could predict the time dependence of all important parameters such as temperature, density, elastic collision rate. By incorporating trap loss due to background gas collisions into our model we derived the threshold conditions for “run-away” evaporation. This is chara...

Evaporative cooling of sodium atoms.

s (to be published) Abstract No. 1-M3. [9] W. Petrich, M. H. Anderson, J. R. Ensher, and E. A. Cornell, in Fourteenth International Conference on Atomic Physics, Boulder Colorado, 1994 (Ref. [8]). [10] M. Kasevich (private communication). [11] E. Tiesinga, A. J. Moerdijk, B. J. Verhaar, and H. T. C. Stoof, Phys. Rev. A 46, R1167 (1992). [12] H. F. Hess, Phys. Rev. B 34, 3476 (1986). [13] K. B. ...