Antihydrogen Production within a Penning-Ioffe Trap

Slow antihydrogen ($\overline{\mathrm{H}}$) is produced within a Penning trap that is located within a quadrupole Ioffe trap, the latter intended to ultimately confine extremely cold, ground-state $\overline{\mathrm{H}}$ atoms. Observed $\overline{\mathrm{H}}$ atoms in this configuration resolve a debate about whether positrons and antiprotons can be brought together to form atoms within the divergent magnetic fields of a quadrupole Ioffe trap. The number of detected $\overline{\mathrm{H}}$ atoms actually increases when a 400 mK Ioffe trap is turned on.