Abstract: A process to produce energy with the fusion of hydrogen and carbon in a thermonuclear fusion reaction with an extension, wherein carbon targets are bombarded with a beam of fast protons at temperatures of 457 kev. The thermonuclear fusion reaction produces two helium atoms and two neutron particles.The neutrons are captured by a blanket of lithium 7 which cools the walls and carries the heat to a turbulent heat exchanger, then to a generator and turbine complex which generates energy, giving tritium as a sub-product.The helium atoms plus alpha particles and protons are extracted to the reactor's extension where, combined with the tritium emitted in the first cycle of the thermonuclear fusion reactor, they go to generate more energy.This process becomes self-maintaining once the thermonuclear fusion reactor is put into operation.