Electron drift velocities in molecular-gas-rare-gas mixtures

Electron Transport Coefficients in Carbon Monoxide and Deuterium

“…Milloy (1977) measured drift velocities in pure CO between 10 and 100 Td (1 Td == 10-17 V cm 2 ) and also made measurements in Ar-CO and He-CO mixtures. An interesting feature of his mixture results is the occurrence of negative differential conductivity Robson 1984), although the effect was not as pronounced as predicted by Long et al (1976). Recently, after the preliminary reports of our data , Nakamura (1987) published values of drift velocities for CO (and N2) in the region between 0·3 and 300 Td, together with data for DL/Il.…”

Electron attachment properties of c-C4F8O in different environments

“…The same effect was observed in [36] for small admixtures about 0.5% of octafluorocyclobutane c-C 4 F 8 in Ar. This decrease of the drift velocity, often referred to as negative differential mobility or negative differential conductivity, has been studied extensively [37,38,39] and is considered common for diluted mixtures of molecular gases in Ar.…”

Electron swarm parameters of the hydrofluoroolefine HFO1234ze

“…There is no sensitivity of I ion (T 3 ) on the exact value of T 3 , since I ion (t) is basically constant on the time scale of T e . Using this considerations together with equation (19), the measured current can be written as…”

“…At low E/N , the drift velocity in the HFO1234ze/Ar mixtures is decreasing with increasing E/N , and is higher than the drift velocity in either Ar or HFO1234ze. These phenomena, often referred to as negative differential mobility or negative differential conductivity, have been studied extensively [19,21,20] and are considered common for diluted mixtures of molecular gases in Ar.…”