Measurements on halogen-quenched counters

Abstract

Measurements have been. made of the gas amplification factor of a cylindrical counter filled with neon-bromin e and argon-bromin~mixtures. Information has been obtained as to ttie mechanism of gas multiplication when the gas amplification is less than 100. The transit time of electrons across a tube of average dimensions aperated in the proportional region was found to be less then 0.2 microseconds. The duration and the mechanism of the discharge build-up w.as found to change with the amount of bromine present in the counter. w 2. Apparatus. As with previous mcasuramentsr observations have been made on the pulse wMeh,.was,pro6uced when ionizing *) This work Was performed at the Physics Departmeh~ Southamptdn Unive~ity Englai~d.