Computer program simulating the quench of superconducting magnet systems

A computer program for testing coil and protection design of a composed magnet system is presented. Small high field magnets composed of two uniaxial cylindrical oils of different superconducting materials (e.g., NbTi and V3Ga or Nb3Sn) are considered. Each coil consists of several sections protected by shunts. The system is driven by one power supply. In order to take into account quench propagation due to thermal conduction and to rapid current increase, which is important in inductively coupled systems, a one-dimensional thermodiffusion equation is solved. Field and temperature dependence of the critical current of every layer of the magnet system are regarded. Current sharing as well as the temperature dependence of specific heat, of resistivity and of thermal conductivity are taken into account. 8 refs