Review on the industrial fabrication of the superconducting HERA quadrupole coils

The superconducting quadrupole coils for HERA had been developed and successfully tested as laboratory prototypes by CEN-Saclay under contract of DESY, Hamburg. The authors report on the fabrication under industrial conditions and on test results of collared preseries and series coils. Special emphasis is laid on the consequences resulting from slight but relevant changes in material properties for the series compared to the prototypes like mechanical tolerances, permeability, insulation thickness or sensitivity to temperature during curing. 1 ref., 5 figs., 1 tab