We demonstrate a prototype of a laser-cooled ~(87)Rb fountain clock and measure the frequency shift due to cold collisions. The shill is fractionally 30 times smaller than that in a laser-cooled Cs clock. We observe a density dependent pulling by the microwave cavity and use it to cancel the collision shift. We have also demonstrated a juggling atomic fountain to_ study cold collisions and we discuss the importance of juggling for future fountain clocks.
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