Evaporative cooling of a guided rubidium atomic beam
Evaporative cooling of a guided rubidium atomic beam
We report on our recent progress in the manipulation and cooling of a magnetically guided, high-flux beam of $^{87}\mathrm{Rb}$ atoms. Typically, $7\ifmmode\times\else\texttimes\fi{}{10}^{9}\phantom{\rule{0.3em}{0ex}}\text{atoms}\phantom{\rule{0.3em}{0ex}}\text{per}\phantom{\rule{0.3em}{0ex}}\text{second}$ propagate in a magnetic guide providing a transverse gradient of $800\phantom{\rule{0.3em}{0ex}}\mathrm{G}∕\mathrm{cm}$, with a temperature $\ensuremath{\sim}550\phantom{\rule{0.3em}{0ex}}\ensuremath{\mu}\mathrm{K}$, at an initial velocity of $90\phantom{\rule{0.3em}{0ex}}\mathrm{cm}∕\mathrm{s}$. The atoms are subsequently slowed down to …