Magnets for the German Spallation Source SNQ

For the SNQ high energy linac 320 quadrupoles with a gradient of up to 6 T/m and a bore of 80 mm will be used. The design and mechanical layout of a cheap prototype are presented. The coils with a low resistivity and a high filling factor are produced by simply sawing from a forged hollow copper block. Due to radiation exposure no organic materials are used and insulation is established by spacers and distance. Design criteria and layout of the beam line and the tolerances are discussed.