Bestimmung der Driftgeschwindigkeit von Elektronen in Wasserstoff und Stickstoff bei hohem Druck

By means of a time of flight method the electron drift velocity in hydrogen and nitrogen was determined for high pressure, at which no measurements were as yet available. The values are obtained in the range fromE/p=12 toE/p=0,03 V/cm Torr with an accuracy from 1% to 1,5%. The pressure range available (up to 31000 Torr) enabled an examination of the similarity rule. The measurements show that for constantE/p, in the rangeE/p<1, the drift velocities decrease with increasing pressure.