Measurement of Ionization and Attachment Coefficients in Carbon Monoxide in Uniform Fields

The ratio of the radial diffusion coefficient to mobility Dr/μ has been measured for electron swarms moving through uniform electric fields in carbon monoxide and carbon dioxide for the range 3 less-than-or-eq, slant E/p less-than-or-eq, slant 500 and 10 less-than-or-eq, slant E/p less-than-or-eq, slant 550 V cm−1 Torr−1 at 0 °C respectively using the analytical methods described by Kontoleon et al (1972). The values of Dr/μ in the range E/p>50 are the first results in both the gases. The ionization coefficient α/p has been calculated from the current-growth experiments in carbon monoxide and carbon dioxide in the range 50 less-than-or-eq, slant E/p less-than-or-eq, slant 500, and the values of α in CO, in the range E/p>90, have been measured for the first time.The present experimental data obtained for carbon dioxide is used to calculate the electron energy distribution and the mean energy using the techniques described by Lucas (1969).

Section: Carbon Monoxidesupporting

confidence: 90%

“…It has been shown in the figure that the values obtained by Bhalla and Craggs (1960) agree fairly well with the present results over the same range, whilst the values of Townsend (1948) give better agreement.…”

Section: -2 Carbon Dioxidesupporting

confidence: 86%

Diffusion and ionization studies for electron swarms in carbon monoxide and carbon dioxide

Lakshminarasimha

Lucas

Kontoleon

1974

“…As this percentage is reduced, the values of am/N asymptotically reach constant values as indicated in the figure. It should be noted that at 100% CO the values of the apparent ionization coefficient are in good agreement with the data of Bhalla and Craggs (1961). Also shown in the diagram are the data obtained by Price et a1…”

supporting

confidence: 88%

Ionization in mixtures of oxygen and carbon monoxide

Price

Moruzzi

1973

Negative-ion formation in oxygen has been suppressed by the addition of carbon monoxide. Values of the ionization coefficients obtained from current growth experiments in these mixtures as the CO content tends to zero are in excellent agreement with values of α/N obtained in O2-H2 mixtures, confirming that the technique can be used without significantly altering the electron energy distribution of oxygen. Values of α/N for oxygen have been obtained over the range 75-350 Td, where 1 Td=0·33 V cm−1 Torr−1 at 20°C.

“…In figure 7 we show a plot of the mean energy (Eb before and E, after a collision) as a function of E / N in carbon monoxide gas. Also shown is the breakdown voltage V, (Bhalla andCraggs 1961, Thomson andThomson 1933) and the minimum voltage (indicated by the crosses). As mentioned previously the condition for measuring equilibrium swarm parameters is that V, > 10 E,, and this region can be clearly identifed on the graph.…”

Section: Carbon Monoxidementioning

confidence: 99%

The ratio of radial diffusion coefficient to mobility for electrons in hydrogen, nitrogen and carbon monoxide at high E/N

Al-Amin¹,

Lucas²,

Kucukarpaci³

1985

Measurements of the ratio of radial diffusion coefficient to mobility, Dr/ mu , have been obtained for carbon monoxide, nitrogen and hydrogen. A pulse technique has been used covering a wide range of E/N from 28 to 5650 Td. The values of Dr/ mu vary between 0.8 and 17 eV in carbon monoxide, between 1.2 and 16 eV in nitrogen and between 1 and 12 eV in hydrogen. Comparison has been made with results of a Monte Carlo computer simulation. For all the gases, fair agreement has been obtained with the theory except for the highest of range E/N. This discrepancy has been explained by the presence of a non-equilibrium electron energy distribution in the experimental measurements.