DE/dx MEASUREMENTS WITH ARGUS
نویسنده
چکیده
The use of pure heavy hydrocarbons like propane or isobutane has some advantages for drift chaders that measure the specific ionisation for particle identification. With a prototype of the ARGUS drift chamber various gases were tested with a 3 GeV/c electron beam. We found a dE/dx resolution for propane of Fwhm= 10.4% and for isobutane Fwhm = 9.9X, by a factor of + 1.6 better than that for argon-methane (92:8) mixture with Fwhm = 16.4%. The ARGUS Drift Chader
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