Precision planar drift chambers and cradle for the TWIST muon decay   spectrometer
  To measure the muon decay parameters with high accuracy, we require an array of precision drift detector layers whose relative position is known with very high accuracy. This article describes the design, construction and performance of these detectors in the TWIST (TRIUMF Weak Interaction Symmetry Test) spectrometer. 
R. S. Henderson (1), Yu. I. Davydov (1 and 2), W. Faszer (1), D. D.   Koetke (3), L. V. Miasoedov (2), R. Openshaw (1), M. A...