A polarized electron target for a high energy muon beam polarimeter
1994
A special magnet designed to saturate at 2.2 T a 2.7 mm thick, 180 mm wide and 588 mm long rectangular iron foil has been built in Saclay for the CERN SMC experiment muon beam polarimeter. It consists of an H iron yoke equipped with two magnetizing copper coils operated in a pulsed mode in order to periodically invert the foil magnetisation. The operation point and the demagnetizing factor influence are discussed. The measurements with a search coil of the resulting flux density and the influence of the eddy currents are presented. The magnet fringe field which affects particle trajectories has also been measured. >
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