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- Levitated_dipole abstract "A levitated dipole is a proposed nuclear fusion reactor technology using a solid superconducting torus, magnetically levitated in the reactor chamber. The superconductor forms an axisymmetric magnetic field of a nature similar to Earth's or Jupiter's magnetospheres, and it is believed that such an apparatus could contain plasma more efficiently than other fusion reactor designs.On Friday, August 13, 2004 at 12:53 PM, the Levitated Dipole Experiment, a collaboration between Columbia University and MIT, successfully energized a superconducting torus with RF and momentarily created plasma within the magnetic field of the dipole. The LDX team has since successfully conducted its first levitation tests, including a 40-minute suspension of the superconducting coil on February 9, 2007. Scientific results, including the observation of an inward turbulent pinch, were reported in Nature Physics.The Levitated Dipole Experiment was funded by the United States Department of Energy's Office of Fusion Energy, but funding for the LDX and other alternative fusion projects was ended in November 2011 to concentrate funding on tokamak approaches. MIT and Columbia are attempting to find other funding sources.Unlike other types of magnetically confined fusion, the Levitated Dipole is designed to be robust to external fluctuations in electric/magnetic fields. In most laboratory plasmas, small fluctuations can cause significant energy loss; however in a dipolar magnetic field, fluctations tend to actually compress the plasma without energy loss. This compression effect was first noticed by Akira Hasegawa (of the Hasegawa-Mima equation) after participating in the Voyager 2 encounter with Uranus.A power source based on the LDX device would utilize an advanced fuel cycle known as the tritium suppressed DD reaction (deuterium-deuterium (D-D) reaction). In this fuel cycle the secondary tritium is removed from the plasma, a unique capability of a dipole. This has advantages relative to the more conventional deuterium-tritium (D-T) reaction of other confinement and compression devices such as the tokamak or inertial confinement fusion (ICF) devices that amplify and focus multiple high-energy beams of lasers, electrons or ions onto tiny pellets of D-T fuel.Although heat and pressure requirements for D-D fusion are more difficult than D-T fusion, the payoff of the D-D reaction is the relative absence of "fast neutrons" produced by the D-T reaction that contaminate the containment vessel and require massive shielding. In addition, deuterium is readily available in sea water, unlike tritium, which must be bred in reactors before it can be used as fuel in the D-T reaction.".
- Levitated_dipole wikiPageExternalLink 8542832.
- Levitated_dipole wikiPageExternalLink ldx.
- Levitated_dipole wikiPageID "918877".
- Levitated_dipole wikiPageRevisionID "590841875".
- Levitated_dipole hasPhotoCollection Levitated_dipole.
- Levitated_dipole subject Category:Columbia_University.
- Levitated_dipole subject Category:Fusion_power.
- Levitated_dipole subject Category:Fusion_reactors.
- Levitated_dipole subject Category:Massachusetts_Institute_of_Technology.
- Levitated_dipole subject Category:Plasma_physics.
- Levitated_dipole type Apparatus102727825.
- Levitated_dipole type Artifact100021939.
- Levitated_dipole type Equipment103294048.
- Levitated_dipole type FusionReactors.
- Levitated_dipole type Instrumentality103575240.
- Levitated_dipole type NuclearReactor103834040.
- Levitated_dipole type Object100002684.
- Levitated_dipole type PhysicalEntity100001930.
- Levitated_dipole type ThermonuclearReactor104422409.
- Levitated_dipole type Whole100003553.
- Levitated_dipole comment "A levitated dipole is a proposed nuclear fusion reactor technology using a solid superconducting torus, magnetically levitated in the reactor chamber.".
- Levitated_dipole label "Levitated dipole".
- Levitated_dipole label "Левитирующий диполь".
- Levitated_dipole sameAs m.03pvqp.
- Levitated_dipole sameAs Q3817417.
- Levitated_dipole sameAs Q3817417.
- Levitated_dipole sameAs Levitated_dipole.
- Levitated_dipole wasDerivedFrom Levitated_dipole?oldid=590841875.
- Levitated_dipole isPrimaryTopicOf Levitated_dipole.