Design, performance and applications of the GSI three-dimensional magnet measuring device

A versatile Magnet Measuring Device is described, that produces large maps of the three field components in a volume of 2.7 m/spl times/1 m/spl times/1 m. Its main components are: the machine itself, which is based on a large granite table with slideways and air bearing shoes; the probe arm (up to 4 m long); the 3D probe head with three orthogonal hallplates. The straightness and flatness of the table and slideways is /spl les/5//spl mu/m, the position accuracy is better than 50 /spl mu/m while measuring "on the fly" with the 4 m long probe arm. Four applications are discussed: two dipoles, an electron cooling device and a large solenoid detector.<
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