Abstract
The magnetic stability of a dynamically stabilized NbTi or Nb3Sn strip conductor has been analyzed theoretically when the external field is applied perpendicular to the wide plane of the conductor. Under the condition that the conductor is face-cooled, an expression of the limiting current density of stability JC has been derived as a function of pertinent parameters of the conductor and the heat transfer of coolant. It is to be noted that JC is independent of the width of the strip conductor. An average critical current density as high as 300A/mm2 can be attained without suffering from magnetic instability. Even if the structural member is introduced in the winding, overall current density in excess of 100A/mm2 is expected to be achieved in large-scale magnets.
