[credit to wikipedia]
So it would appear that the type 1 meissner effect allows for the localized increase of magnetic flux density (as the displaced field must go somewhere, the B field is somewhat larger at the surfaces of the superconductor then elsewhere, and in fact is a higher value then anywhere prior to the superconducting transition.)
What would be expected to happen if this experiment could be arranged?
So basically - imagine a box made entirely of a cooled type-1 superconductor (walls thick enough that we can ignore the London penetration depth) with two holes : one just the right size to insert half of a dipole magnet, and another above this.
The flux lines of the magnet would be unable to penetrate the superconductor to loop back to the south pole, except by means of the circular hole (or in practice, whatever gap there is between the magnet and the superconductor)
Does that mean we would see a significantly larger B field at that hole? Would all the lines really be forced to travel through that area to return to the south pole?
What if the gap was removed and there was no possible return path that did not pass through the superconductor?
Or would the static field strength of the magnetic cause the superconductor to return to a normal state by exceeding its critical field density? (It seems like those values for Hc are quite high and usually occur as the result of using a superconductor as an electromagnet in particle accelerators / NMR machines / etc)