The
purpose of the present paper is to evaluate the swarm parameters in CF3I+CF4+Ar
ternary gas mixtures with dilute CF3I components. The swarm
parameters reported are namely, ionization, attachment, effective ionization,
excitation rates and electron mean energies.
We present the swarm data of the ternary mixture for various CF4+Ar
base mixtures with dilute CF3I concentrations and analyze positive
synergism in terms of attachment, ionization and excitation rates in the E/N
range of 50–700 Td (1 Td = 10-21 Vm2). In the ternary mixture, Ar component of the
ternary mixture is kept constant at concentrations in the range of 40% - 90%
and the CF3I component is increased from 0.5% to 55%. In the dilute
CF3I mixtures, there is a marked increase in the electronegativity
together with increased total excitation rates while the CF3I
component is increased. The mean energy of electrons is also reduced with
increasing CF3I content at given E/N accordingly. The limiting E/N
values are obtained at the E/N values where the rate of ionization is equal to
the rate of attachment. The limiting E/N increases in the ternary mixture as
the CF3I ratio is increased in the present study. The synergism is
calculated using the Boltzmann solution results of the limiting E/N fields.
Positive synergism is observed within the parameter range of this study. The
degree of synergy is very high with dilute CF3I components.
Gas discharges Trifluoromethyliodinecation (CF3I) Tetraflorometan (CF4) Argon Electron swarm parameters
Primary Language | English |
---|---|
Subjects | Engineering |
Journal Section | Electrical & Electronics Engineering |
Authors | |
Publication Date | March 1, 2019 |
Published in Issue | Year 2019 Volume: 32 Issue: 1 |