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In page Large Plasma Device:

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The first version of the LAPD was a 10 meter long device constructed by a team led by Walter Gekelman in 1991.[1] The construction took 3.5 years to complete and was funded by the United States Navy.[2] Following the award of a $4.8 million grant by the US Department of Energy and the National Science Foundation in 2001,[2] the LAPD was upgraded to its current 20 meter long version and is still operational today.