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A polarimeter capable of determining transverse component polarization profile of the 222 MeV proton beam both in horizontal ({ital x}) and vertical ({ital y}) directions with faster than 1 Hz scanning frequency has been developed and built as part of the preparations in the TRIUMF Experiment 497 measuring the flavour conserving hadronic weak interaction (parity violation measurement). The design features and test performance results are presented. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

The TRIUMPF experiment 497 which will measure the (weak) parity violating component of the nucleon-nucleon interaction with proton-proton quasi-elastic scattering at 223 MeV is described. The longitudinal analyzing power A{sub {ital z}}=({sigma}{sup +}{minus}{sigma}{sup {minus}})/({sigma}{sup +}+{sigma}{sup {minus}}) where {sigma}{sup +} and {sigma}{sup {minus}} are the scattering cross sections for positive and negative beam helicity, respectively, with an expected precision of {plus_minus}2{times}10{sup {minus}8}. (AIP)