Measurements on halogen-quenched counters

Summary Measurements have been made of the gas amplification factor of a cylindrical counter filled with neon-bromine and argon-bromine-mixtures. Information has been obtained as to the mechanism of gas multiplication when the gas amplification is less than 100. The transit time of electrons across a tube of average dimensions operated in the proportional region was found to be less then 0.2 microseconds. The duration and the mechanism of the discharge build-up was found to change with the amount of bromine present in the counter.This work was performed at the Physics Department, Southampton University England.