Some Experimental Consequences of Flux Conservation within Multiply-Connected Superconductors

Abstract
A removable ferromagnetic core is used to increase the trapped flux in a multiply‐connected superconductor. This original trapped flux is then compressed by a superconducting piston so as to produce an intense magnetic field within a relatively large volume. Additional experiments are described in which superconducting switches are used to compress the flux in a cyclic manner.