As Motherboard reports, researchers at the Energy Department's Lawrence Livermore National Laboratory have discovered that a new magnetic field setup more than tripled the energy output of the fusion reaction hotspot in experiments, "approaching" the level required for self-sustaining ignition in plasmas.The field was particularly effective at trapping heat within the hotspot, boosting the energy yield.The hotspot's creation involved blasting 200 lasers at a fusion fuel pellet made from hydrogen isotopes like deuterium and tritium.The team achieved their feat by wrapping a coil around a pellet made using special metals.The finding makes ignition considerably more achievable, though, and that in turn improves the chances of an energy-positive fusion system."