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7T/900mm Magnet

7T/900mm Magnet. Company Confidential. 7T/900mm Magnet – Interesting Info. Central field 7.0T  100,000-140,000 x Earth’s field Inductance ~ 3731 Henry! Stored energy at 7T ~ 78.4 MJ Cryogens to cool down: ~14,000 liters of liquid nitrogen, ~12000 liters of liquid helium

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7T/900mm Magnet

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  1. 7T/900mm Magnet Company Confidential

  2. 7T/900mm Magnet – Interesting Info • Central field 7.0T  100,000-140,000 x Earth’s field • Inductance ~ 3731 Henry! • Stored energy at 7T ~ 78.4 MJ • Cryogens to cool down: • ~14,000 liters of liquid nitrogen, ~12000 liters of liquid helium • Two cryorefrigerators to maintain relatively low boil off of ~0.2 liters/hr • 5 gauss (Greenfield): • 17.7 m (~58 ft) radial, 22.5 m (~74 ft) axial • or…116 ft x 148 ft area! • ~213 tonne (~470,000 lbs) low carbon steel shield to reduce 5 gauss fringe field to ~ 9m (X) x 9m (Y) x 12m (Z) • Magnet Wire ~ 430 km (~267 miles)! • Magnet Weight ~ 32000 kg (~71000 lbs) • Magnet Length ~3.366 m (~11 ft) • Magnet Width ~2.38 m (~7.8 ft) • Magnet Height ~3.73 m (~12.2 ft) (to top of cold heads)

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