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Macroscopic Liquid Metal Experiments at Illinois

Macroscopic Liquid Metal Experiments at Illinois. David N. Ruzic Department of Nuclear, Plasma, and Radiological Engineering University of Illinois at Urbana Champaign. Tokamak First Wall : self propelled metal concept.

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Macroscopic Liquid Metal Experiments at Illinois

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  1. Macroscopic Liquid MetalExperiments at Illinois David N. Ruzic Department of Nuclear, Plasma, and Radiological Engineering University of Illinois at Urbana Champaign

  2. Tokamak First Wall :self propelled metal concept externally supplied current may cause metal to flow up outboard wall

  3. General Schematic of Experiment  14 Amp current

  4. Hydrogen plasma discharge interaction with liquid gallium • A current through the liquid gallium metal was not shorted when a hydrogen plasma was present even with a large current flow though liquid metal.

  5. Magnetic Field Gradient

  6. J X B Force downward current lead Metal in gradient area rises But current density also increased ! Force

  7. First Liquid Gallium Experiments • Metal in gradient area is not pushed down as hard as metal in stronger field. • Level rises about 3 mm. • Metal does not flow up the curved wall. • But current density increases near the wire so J goes up as B goes down.

  8. Second Liquid Gallium Experiments • Replace wire current lead with a paddle shaped electrode to keep current density constant as gallium rises up the curved wall • Don’t make electrode out of aluminum! • Results showed a 2 mm displacement along curved surface at full field and 9 Amps

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