ScienceRocks
Democrat all the way!
- Thread starter
- Banned
- #61
Lab reports big advance in laser fusion quest
The latest experimental run at the National Ignition Facility produced as many as one quarter of the neutrons needed to trigger sustained fusion.
By David Kramer
The latest experimental run at the National Ignition Facility produced as many as one quarter of the neutrons needed to trigger sustained fusion.
By David Kramer
Lab reports big advance in laser fusion quest | Politics and Policy - Physics TodayResearchers at Lawrence Livermore National Laboratory say they have tripled the number of neutrons produced by fusion in tiny capsules of deuterium and tritium and thus have moved the National Ignition Facility a step closer to its goal of sustained nuclear fusion. The 13 August firing of NIF's 192-beam laser yielded 3 × 1015 neutrons, whose total energy reached 8 kilojoules. That output was nearly twice the 5 kJ of energy that produced the plasma in the peppercorn-sized sphere of fusion fuel, says Ed Moses, the lab's principal associate director for NIF.
The result puts NIF a factor of four to five away from ignition, says Moses; last fall the Department of Energy reported that NIF was an order of magnitude away from its goal. Only a factor-of-two increase in plasma energy will be needed to attain alpha heating, an intermediate milestone at which alpha particles from fusion reactions contribute twice as much energy to the plasma as the laser does.