They are jumping around far too fast for physicists to manipulate or study them. But he adds that work is continuing, with further adjustments still to be made. By next year the AD will provide a stable beam to the experiments. But before doing this they must cool and slow the antiprotons even further, to the equivalent of just one-degree above absolute zero. Passing them through thin slices of material, such as aluminium foil does this.
Antiprotons only annihilate when they encounter another proton or neutron in a nucleus.
So it is very rare for antiprotons to hit a nucleus and annihilate. Usually they pass through the electron clouds surrounding the nuclei, which simply slows them down. These ultracold antiatoms are quite stable, and physicists will study them with lasers, looking for clues that might help to explain the narrow escape of our universe from annihilation before it even got started.