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Set up in late 2005 with similar overall research goals as its predecessor, ALPHA makes, captures and studies atoms of antihydrogen and compares these with hydrogen atoms.</p> <p>Creating antihydrogen depends on bringing together the two component antiparticles, antiprotons and positrons, in a trapping device for charged particles. Since antihydrogen atoms have no electric charge, once they form they can't be confined in such a device. In the ATHENA experiment the antiatoms would drift naturally to the walls of the trap. Because these walls were made of ordinary matter, the contact caused the antiatoms to annihilate a few microseconds after they were created.</p> <p>ALPHA is picking up from where ATHENA left off. 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