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Magnetic levitation using magnesium diboride
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View: Figures


Image of FIG. 1.
FIG. 1.

Experimental setup for levitation force measurements (, connections to the force sensor and the positioning system; V, vacuum chamber; PM, permanent magnet; MB, magnesium boride sample; SF, superinsulating foil; T, temperature sensor; H, heater; and C, cold head).

Image of FIG. 2.
FIG. 2.

Levitation force of sample C at .

Image of FIG. 3.
FIG. 3.

Levitation force of sample C at .

Image of FIG. 4.
FIG. 4.

Levitation force of sample C at .

Image of FIG. 5.
FIG. 5.

Levitation force of the samples for a gap of in the temperature range of (the lines are just guides for the eye).

Image of FIG. 6.
FIG. 6.

Magnetic bearing arrangement (C, cold head; H, heater; T, temperature sensor; SF, superinsulating foil; MB, magnesium boride sample; PM, bearing magnetic; SD, steel disk; and 4M, arrangement of four magnets as shown in Fig. 7; AU, acceleration unit; and P, removable platform).

Image of FIG. 7.
FIG. 7.

Top view of the rotor with four alternately oriented permanent magnets embedded in an Al disk; the dashed curve indicates the position of the stator coil.

Image of FIG. 8.
FIG. 8.

Levitation of the rotor at .

Image of FIG. 9.
FIG. 9.

Spin-down measurement of the bearing at .


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Scitation: Magnetic levitation using magnesium diboride