High Spatial Resolution Proportional Chambers
Apr 24, 197016 pages
Published in:
- Nucl.Instrum.Meth. 86 (1970) 173-176
Report number:
- NAL-FN-208,
- FERMILAB-FN-0208
Citations per year
Abstract: (Elsevier)
Multiwire proportional chambers with 1 mm wire spacing have been built at National Accelerator Laboratory and tested at Argonne National Laboratory in a spatially separated beam of 2.1 GeV/ c π + . At 1 atm pressure using 10% methane and 90% argon gas mixture with 3 mm gap the detection efficiency approaches 100%. The measured transit time of the primary electrons is less than 10 nsec with this spacing. The pressure dependence of the proportional pulses was investigated. At one atmosphere the width of the time distribution is 34 nsec at fwhm and very much broadened at higher pressures. We find that a spatial resolution of ±0.5 mm was reached. We believe even higher resolutions may be obtainable. A chamber of this type is capable of counting above 10 6 pulses per wire per second, provide good timing information, be capable of operation in magnetic fields, and provide high multiparticle detection efficiencies.- proportional wire chamber
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