TY - JOUR
TI - Electron swarm parameters in C _{2} H _{2} , C _{2} H _{4} and C _{2} H _{6} : measurements and kinetic calculations
AU - Pinhão, N R
AU - Loffhagen, D
AU - Vass, M
AU - Hartmann, P
AU - Korolov, I
AU - Dujko, S
AU - Bošnjaković, D
AU - Donkó, Z
T2 - Plasma Sources Science and Technology
AB - This work presents swarm parameters of electrons (the bulk drift velocity, the bulk longitudinal component of the diffusion tensor, and the effective ionization frequency) in C2Hn, with n=2, 4, and 6, measured in a scanning drift tube apparatus under time-of-ﬂight conditions over a wide range of the reduced electric ﬁeld, 1 TdE/N1790 Td (1 Td = 10−21 V m2). The effective steadystate Townsend ionization coefﬁcient is also derived from the experimental data. A kinetic simulation of the experimental drift cell allows estimating the uncertainties introduced in the data acquisition procedure and provides a correction factor to each of the measured swarm parameters. These parameters are compared to results of previous experimental studies, as well as to results of various kinetic swarm calculations: solutions of the electron Boltzmann equation under different approximations (multiterm and density gradient expansions) and Monte Carlo simulations. The experimental data are consistent with most of the swarm parameters obtained in earlier studies. In the case of C2H2, the swarm calculations show that the thermally excited vibrational population should not be neglected, in particular, in the ﬁtting of cross sections to swarm results.
DA - 2020/04/02/
PY - 2020
DO - 10.1088/1361-6595/ab7841
DP - DOI.org (Crossref)
VL - 29
IS - 4
SP - 045009
J2 - Plasma Sources Sci. Technol.
LA - en
SN - 1361-6595
ST - Electron swarm parameters in C _{2} H _{2} , C _{2} H _{4} and C _{2} H _{6}
UR - https://iopscience.iop.org/article/10.1088/1361-6595/ab7841
Y2 - 2021/07/19/05:40:42
ER -