Pulsed Evaporative Cooling for Trapped Highly Charged Ions.

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  • Kinugawa Tohru
    Cold Trapped Ions Project, ICORP, Japan Science and Technology Corporation (JST), Chofu, Tokyo 182–0024
  • Currell Frederick J.
    Cold Trapped Ions Project, ICORP, Japan Science and Technology Corporation (JST), Chofu, Tokyo 182–0024
  • Ohtani Shunsuke
    Cold Trapped Ions Project, ICORP, Japan Science and Technology Corporation (JST), Chofu, Tokyo 182–0024

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Abstract

We propose the application of pulsed evaporative cooling, which has been used successfully for Bose-Einstein condensation of neutral atoms, to highly charged ions. Practically, this cooling technique can be highly efficient and favorable for ions in an electron beam ion trap (EBIT). By computer simulation, we have numerically estimated the performance of this cooling scheme on the basis of the standard evaporation theory. The result is very promising; from the initial temperature of 500 eV, Kr+30 can be cooled to room temperature within a few seconds.

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