It is an interesting idea, but there are other ways, probably easier, to get the positrons. For example, some radioisotopes emit positrons as part of their natu

It is an interesting idea, but there are other ways, probably easier, to get the positrons. For example, some radioisotopes emit positrons as part of their natural radioactive decay process. See: http://arstechnica.com/science/2011/02/positrons-at-center-of-recent-anti-progress-in-matter-research/ http://arstechnica.com/science/2011/02/positrons-at-center-o...