Abstract

A polarimeter is described having a large solid angle of acceptance and using a carbon analyser combined with 12 multiwire proportional chambers. Its analysing power for protons has been calibrated at TRIUMF with an absolute accuracy reaching ±0.015 ≡ 2% in the angular range 3.5° to 28° laboratory angle and for incident energies between 107 and 462 MeV. A mean analysing power of about 35% and an efficiency of approximately 3% was observed.

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