Flange technologies are described for a flange comprising a first and second side. Each side may include a knife edge surface disposed circumferentially around a base surface and a periphery section disposed around the knife edge surface. The knife edge surface and the periphery section are effective to define grooves therebetween. The flange may include an alloy with a relatively high thermal conductivity and yield strength. The flange may include water channels to remove heat.
STATEMENT OF GOVERNMENT RIGHTS
 The present application was made with government support under contract number DE-AC02-98CH 10886 awarded by the U.S. Department of Energy. The United States government has certain rights in the invention.