Cylindrical Dritt Chambers with Two Dimsional Readout

We have built and used a set of three cylindrical drift chambers with delay line readout. The azimuthal coordinate is obtained in the conventional way; the resolution obtained is about 300 microns. The axial coordinate is obtained fran signals induced on printed circuit delay lines with a resolution of ±5 mn FWHM. The chambers are 120 cm long and have diamters of 29.3 cm, 70.1 cm and 118.5.