How do we detect antimatter in space?

We posed this question to Professor Andy Parker from the High Energy Physics Group at Cambridge University...

Andy - Well, it depends which sort of antimatter particle we're looking for, but basically, you have lots of detectors which can tell the mass of particles, and if you put them into a magnetic field, they bend one way or the other, depending on their electric charge. So if we see something with a proton mass and a negative charge, then we identify it as an antiproton, and similarly for anti-electrons which are the dominant things that you would expect to see coming at you.