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

Volume

30

Issue

4

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

2447

Lastpage

2450

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.305772

Filename

305772