Electron screening and kinetic-energy oscillations in a strongly coupled plasma.
نویسندگان
چکیده
We study equilibration of strongly coupled ions in an ultracold neutral plasma produced by photoionizing laser-cooled and trapped atoms. By varying the electron temperature, we show that electron screening modifies the equilibrium ion temperature. Even with few electrons in a Debye sphere, the screening is well described by a model using a Yukawa ion-ion potential. We also observe damped oscillations of the ion kinetic energy that are a unique feature of equilibration of a strongly coupled plasma.
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عنوان ژورنال:
- Physical review letters
دوره 93 26 Pt 1 شماره
صفحات -
تاریخ انتشار 2004