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The National Ignition Facility, or NIF, is a laser-based inertial confinement fusion (ICF) research device under construction at the Lawrence Livermore National Laboratory, in Livermore, California, United States. NIF uses powerful lasers to heat and compress a small amount of hydrogen fuel to the point where nuclear fusion reactions take place. NIF is the largest and most energetic ICF device built to date, and the first that is expected to reach the long-sought goal of “ignition”, where the fusion reactions become self-sustaining.
Construction started in 1997 but was fraught with problems and ran into a series of delays that greatly slowed progress into the early 2000s. Progress since then has been much smoother, but compared to initial estimates, NIF is five years behind schedule and almost four times more expensive than budgeted. By August 2007, 96 of the lasers (out of a planned 192) had been completed and commissioned, with a further 48 (for a total of 144) nearing completion. As of June 2008, construction of the NIF is estimated to be completed in March 2009 and that ignition (more energy coming out than is put in) can be achieved by 2010. Its price of over $4 billion and its role in nuclear weapon research have made it a controversial project.
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