Image: Adapted from Angewandte Chemie/Univ. of South Carolina
Max Planck Institute recently completed Wendelstein 7-X, the first large reactor based on a stellarator concept that relies on a cruller-like shape for the twisting action instead of a current.
Full article available
http://www.engadget.com/2015/10/25/stellarator-fusion-reactor-complete/