Analysis of quench development in a cryocooler cooled Bi-2223 pancake coilbased on the anisotropic transport E-J characteristics in a short tape sample

By calculating the magnetic field distribution in a stacked pancake coil wi th use of finite element method and by taking into account the transport pr operties obtained in a short tape sample, we predict the electric field vs. current density, E-J, characteristics depending on the position inside the coil. The thermal quench behavior of the coil has been calculated by the h eat balance equation taking into account the nonlinear Joule heating obtain ed by the E-J characteristics. Calculated results agree well with the measu rements. (C) 2001 Elsevier Science B.V. All rights reserved.