A single beam of accelerated deuterium ions, D+2, of 108 keV, injected into a highly inhomogeneous magnetic field, decreasing quadratically with the radial distance from the center, was made to collide head-on with itself. The trajectory of the ’’self-colliding beam’’ is a precessing figure 8, with the ions moving clockwise in both (upper and lower) loops and colliding head-on in the center.