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The Levitated Dipole Experiment (LDX) was an experiment investigating the generation of fusion power using the concept of a levitated dipole.The device was the first of its kind to test the levitated dipole concept and was funded by the US Department of Energy. [1]
Plasma in the Levitating Dipole Experiment. A levitated dipole is a type of nuclear fusion reactor design using a superconducting torus that is magnetically levitated inside the reactor chamber. The name refers to the magnetic dipole that forms within the reaction chamber, similar to Earth's magnetosphere.
Toroidal machines can be axially symmetric, like the tokamak and the reversed field pinch (RFP), or asymmetric, like the stellarator.The additional degree of freedom gained by giving up toroidal symmetry might ultimately be usable to produce better confinement, but the cost is complexity in the engineering, the theory, and the experimental diagnostics.
The world's largest stellarator experiment, Wendelstein 7-X, began operation in 2015. The current record of fusion power generated by MCF devices is held by JET . In 1997, JET set the record of 16 megawatts of transient fusion power with a gain factor of Q = 0.62 and 4 megawatts steady state fusion power with Q = 0.18 for 4 seconds. [ 3 ]
Levitated dipole [superconducting] (LDX, MIT, PSGC) Maryland Centrifugal (MCX) Sheared magnetofluid/Bernoulli confinement (MBX, Uni Texas) Penning fusion (PFX, LANL) Plasma jets (HyperV, Chantilly) Magnetized target fusion with mechanical compression (General Fusion, Burnaby) Field-reversed colliding beams (Tri-Alpha)
The flux loop is common on tokamaks, [2] magnetic mirrors, Field-reversed configurations, the Levitated dipole experiment and the polywell. [1] [3] In tokamaks a set of loops is used, and these are spaced slightly off-center and non-concentrically. Placing the loops intentionally asymmetrically allows the users to find the magnetic field ...
One rotating magnetic field pulse of the PFRC-2 device during an experiment. The Princeton Field Reversed Configuration (PFRC) is a series of experiments in plasma physics, an experimental program to evaluate a configuration for a fusion power reactor, at the Princeton Plasma Physics Laboratory (PPPL).
To test the new concept, a smaller machine that could be rapidly built was constructed, Tandem Mirror Experiment, or TMX. Construction of MFTF and TMX began in 1977 and TMX began operations in 1979. By the early 1980s, TMX was beginning to demonstrate serious problems that suggested MFTF-B would not work as predicted.