Title :
A polarized electron target for a high energy muon beam polarimeter
Author :
de Botton, N. ; Dael, A. ; Martino, J.
Author_Institution :
CEA, Centre d´´Etudes Nucleaires de Saclay, Gif-sur-Yvette, France
fDate :
7/1/1994 12:00:00 AM
Abstract :
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
Keywords :
beam handling equipment; eddy currents; electromagnets; muon detection and measurement; polarimeters; polarimetry; polarised targets; proton accelerators; synchrotrons; 180 mm; 2.2 T; 2.7 mm; 588 mm; CERN SMC experiment; Cu; Fe; H Fe yoke; SPS; Saclay; demagnetizing factor; eddy currents; flux density; foil magnetisation; high energy muon beam polarimeter; long rectangular Fe foil; magnet fringe field; magnetizing Cu coils; operation point; particle trajectories; periodic inversion; polarized electron target; pulsed mode; search coil; special magnet; Coils; Copper; Electron beams; Iron; Magnetic field measurement; Magnetic flux; Mesons; Polarization; Saturation magnetization; Sliding mode control;
Journal_Title :
Magnetics, IEEE Transactions on
