For 10 points, identify this thermonuclear reaction in which two light nuclei combine to form a heavier nucleus, which is contrasted with fission.
This process can be simplified in an apparatus named for Farnsworth and Hirsch while using a technique abbreviated as IEC. It is the subject of a criterion using the product of the ion density and the confinement time; that is Lawson's criterion. For it to occur, the Coulomb repulsive force must be overcome, and attempts to contain it include the use of a (*) tokamak. This process also occurs in the proton-proton chain reaction in the sun. Erroneous claims were once made regarding its "cold" variety. For 10 points, identify this thermonuclear reaction in which two light nuclei combine to form a heavier nucleus, which is contrasted with fission.
This process can be simplified in an apparatus named for Farnsworth and Hirsch while using a technique abbreviated as IEC.
nuclear {fusion} [accept {cold fusion}; DO NOT accept nuclear fission and make sure it’s clear that they said {fusion}]