Research output: Contribution to journal › Article › peer-review
Experimental and theoretical studies of the electron temperature in nitrogen afterglow. / Dyatko, Nikolay A.; Ionikh, Yury Z.; Kolokolov, Nikolay B.; Meshchanov, Alexander V.; Napartovich, Anatoly P.
In: IEEE Transactions on Plasma Science, Vol. 31, No. 4 II, 08.2003, p. 553-564.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Experimental and theoretical studies of the electron temperature in nitrogen afterglow
AU - Dyatko, Nikolay A.
AU - Ionikh, Yury Z.
AU - Kolokolov, Nikolay B.
AU - Meshchanov, Alexander V.
AU - Napartovich, Anatoly P.
PY - 2003/8
Y1 - 2003/8
N2 - In this paper, results of joint experimental and theoretical studies of the electron temperature in nitrogen afterglow at pulse-periodicai excitation are presented. Electron energy distribution function (EEDF) in an afterglow of a pulsed direct current discharge has been measured by means of a time-resolved Langmuir probe technique. Electron concentration, vibrational temperature, and population of lower metastable electronic state of N2 molecules have also been experimentally estimated at different delays after the discharge pulse. The results show that electron temperature in afterglow decreases with time, while the vibrational temperature remains almost constant. The EEDF has been calculated numerically from a steady-state Boltzmann equation, taking into account electron-electron collisions as well as superelastic collisions with vibrationally and electronically excited molecules. The vibrational distribution function was found numerically by solving a system of kinetic equations. Calculations show that the vibrational distribution function weakly varies within a cycle and is controlled by an average discharge power. Electron temperature in nitrogen afterglow for given populations of vibrational levels and of lower electronic level essentially depends on the electron concentration. Finally, a comparison of the theoretical and experimental results is performed.
AB - In this paper, results of joint experimental and theoretical studies of the electron temperature in nitrogen afterglow at pulse-periodicai excitation are presented. Electron energy distribution function (EEDF) in an afterglow of a pulsed direct current discharge has been measured by means of a time-resolved Langmuir probe technique. Electron concentration, vibrational temperature, and population of lower metastable electronic state of N2 molecules have also been experimentally estimated at different delays after the discharge pulse. The results show that electron temperature in afterglow decreases with time, while the vibrational temperature remains almost constant. The EEDF has been calculated numerically from a steady-state Boltzmann equation, taking into account electron-electron collisions as well as superelastic collisions with vibrationally and electronically excited molecules. The vibrational distribution function was found numerically by solving a system of kinetic equations. Calculations show that the vibrational distribution function weakly varies within a cycle and is controlled by an average discharge power. Electron temperature in nitrogen afterglow for given populations of vibrational levels and of lower electronic level essentially depends on the electron concentration. Finally, a comparison of the theoretical and experimental results is performed.
KW - Electron energy distribution function (EEDF)
KW - Electron temperature
KW - Modeling
KW - Nitrogen afterglow
KW - Vibrational temperature
UR - http://www.scopus.com/inward/record.url?scp=0041426440&partnerID=8YFLogxK
U2 - 10.1109/TPS.2003.815250
DO - 10.1109/TPS.2003.815250
M3 - Article
AN - SCOPUS:0041426440
VL - 31
SP - 553
EP - 564
JO - IEEE Transactions on Plasma Science
JF - IEEE Transactions on Plasma Science
SN - 0093-3813
IS - 4 II
ER -
ID: 9140661