(Phys.org)—With a circumference of 27 km (17 miles),the Large Hadron Collider (LHC) holds the claim of being the largest particle accelerator in the world, but it is far from being the only device of its kind. Currently there are approximately 30000 particle accelerators in operation around the world, and many of them used in medicine and industrial applications,and some of them small enough to fit on a tabletop.
Source: phys.org