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25 April 2024

» arxiv » 1011.2369

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Measurement of the temperature of an ultracold ion source using time-dependent electric fields
N. Debernardi ; M.P. Reijnders ; W.J. Engelen ; T.T.J. Clevis ; P.H.A. Mutsaers ; O.J. Luiten ; E.J.D. Vredenbregt ;
Date:	10 Nov 2010
Abstract:	We report on a measurement of the characteristic temperature of an ultracold rubidium ion source, in which a cloud of laser-cooled atoms is converted to ions by photo-ionization. Extracted ion pulses are focused on a detector with a pulsed-field technique. The resulting experimental spot sizes are compared to particle-tracking simulations, from which a source temperature $T = (1 pm 2)$ mK and the corresponding transversal reduced emittance $epsilon_r = 7.9 X 10^{-9}$ m rad $sqrt{ m{eV}}$ are determined. We find that this result is likely limited by space charge forces even though the average number of ions per bunch is 0.022.
Source:	arXiv, 1011.2369
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