Study of the spatial resolution of a large proportional chamber with the use of the analog readout of cathode information

Results of a study on the detection accuracy of particle coordinates in a large proportional chamber using the cathode information readout are presented. The width of cathode stripts was 18 mm and the anode to cathode distance 7 mm. The avalanche coordinates were determined by the distribution of charge induced on the cathode stripts. The detection accuracy was estimated by the difference of the avalanche coordinates obtained on different cathodes. The accuracy of detection of the avalanche coordinates was 0.6 mm, 1.4 mm, and 4.8 mm at a strip width of 18 mm, 36 mm, and 54 mm, respectively. The cathode strips of 36 mm and 54 mm wide were made by connecting two and three strips 18 mm in width. The measurements have been performed using an X-ray 106Ru source