SEARCH Articles Figures Tables Einstein-Townsend relation First Townsend coefficient Ramsauer-Townsend effect Second Townsend coefficient Townsend avalanche Townsend breakdown mechanism Townsend breakdown region Townsend cell Townsend coefficient Townsend discharge Townsend formula Townsend ionization coefficient Townsend process Townsend unit Townsend, Alan Townsend, James Townsend, Joseph Townsend, Mark Townsend, Oliver Townsend, Ralph Townsend-Basak-McDonald hypothesis