Evaporative cooling of magnetically trapped and compressed spin-polarized hydrogen

A gas of spin-polarized atomic hydrogen can be prepared in the upper hyperfine states and loaded into a static magnetic trap. Evaporative cooling and magnetic compression of such a gas can produce temperatures of 30 μK and densities of ${10}^{14}$ ${\mathrm{cm}}^{-3\mathrm{}}$. Under these conditions a Bose-Einstein condensate may form.