A selection of detector R&D at TRIUMF

At TRIUMF we have an ongoing program of detector R&D. For example, small interelectrode very high rate MWPCs have been developed and are now routinely used in secondary channels at TRIUMF. In a related area the characteristics of ageing in a variety of gas mixtures have been intensely studied, with the remarkable performance of CF4/Isobutane (80:20) discovered. Indeed we have found that an ionization exposure of 0.5 Coulombs per cm of wire in this mixture will reverse existing anode wire damage in single‐wire chambers. TRIUMF is also designing a large volume (2×2×6 m) scintillating fiber detector. Consisting of 1.2×107 1 mm fibers, this detector will meet the requirements for many of the neutrino experiments proposed for the TRIUMF/KAON facility.