DESIGN AND MODELING OF COUPLED PULSE MAGNETS (ELECTRICAL AND THERMAL)

Design and optimization of pulsed magnets requires development of comp uter codes that can analyze a multi-coil magnet system magnetically, t hermally and mechanically. We present a FORTRAN computer code ''Xheat' ' that can be used to design a multi-circuit pulsed magnet using one o r more conductors and reinforcement materials. Xheat is circuit solver that can analyze nonlinear magnetically coupled LR and LRC circuits y ielding currents, voltages and temperature distributions in the magnet winding as a function of time. The power source can be one or more of the following: i) a capacitor bank, ii) a current source, or iii) a v oltage source, A finite difference technique Is used to calculate the properties after a small time step as a function of the temperature at that time. Eddy currents and magneto-resistance are included in resis tance calculations, Xheat writes an input file to an elastic and plast ic stress calculation codes that can generate stresses, strains and di splacement in all magnet layers at the midplane[1].