A scientific experiment to achieve a controlled self-sustaining fusion reaction could revolutionise clean energy generation if successful, according to US scientists.

The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory in California will perform the experiment by targeting 192 laser beams on a small amount of nuclear fuel including deuterium and tritium to cause a nuclear reaction.

Fusion reaction involves fusion of the nuclei of atoms under extreme temperature and pressure that causes the release of huge amounts of energy.

Fusion is different from fission reaction currently used in nuclear power generation that includes energy released from splitting of atoms.

If the experiment, which will be performed in October this year, is a success, more energy will be generated than was pumped into process.