asdex upgrade alcator c-mod anisotropy argus laser asterix iv laser demo east electric tokamak fourier transform gekko xii hiper iskra lasers iter inertial confinement fusion international fusion materials irradiation facility janus laser joint european torus kstar laboratory for laser energetics large helical device laser lawrence livermore national laboratory levitated dipole experiment list of fusion experiments list of laser types long path laser magnetic confinement fusion mega ampere spherical tokamak national compact stellarator experiment national ignition facility national spherical torus experiment neodymium nike laser nova laser novette laser optics shiva laser small tight aspect ratio tokamak tokamak fusion test reactor tokamak de fontenay aux roses tore supra vulcan laser z machine