Low Magnetization Dipole Magnets Made With HTS Tape Conductors

HTS tape dipole magnets are attractive because one can wind the magnet with a fully insulated without reaction or conductor insulation after winding. Problems with these conductors include; reduction of the conductor critical current in regions with large field components that are perpendicular to the flat face of the tape, large fields due to conductor magnetization at low fields that produce large sextupole and decapole fields when beam is injected into the machine, and the design of the coil ends such that winding stress in reduced to prevent conductor degradation. This paper shows how a dipole can be wound with HTS tapes so that low field magnetization is greatly reduced. The coil conductor current density can be higher, and coil stress can be better managed. The pros and cons of the dipole will be discussed.