Eur. Phys. J. Appl. Phys.
Volume 76, Number 1, October 2016
|Number of page(s)||12|
|Section||Plasma, Discharges and Processes|
|Published online||10 October 2016|
Time-dependent coupled kinetics and gas temperature in N2-NO pulsed discharges
Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
2 Departamento de Engenharia Física, Faculdade de Engenharia, Universidade do Porto, R. Dr. Roberto Frias, 4200-465 Porto, Portugal
3 FOM Institute DIFFER, Eindhoven, The Netherlands
4 Eindhoven University of Technology, Department of Applied Physics, Eindhoven, The Netherlands
a e-mail: firstname.lastname@example.org
Revised: 14 June 2016
Accepted: 6 September 2016
Published online: 10 October 2016
A self-consistent time-dependent kinetic model coupled to the gas thermal balance equation is presented for a N2-1%NO millisecond pulsed DC discharge at a pressure of 266 Pa (2 Torr) and a current of 35 mA. The model provides the temporal evolution of the most important heavy species of interest to this work such as N2(X1Σg+, v), NO(X2Π), N2(A3Σu+), N2(a′1Σu-), N(4S) and O(3P), simultaneously with the time-dependent variation of the gas temperature. Predicted results for NO number densities during the pulse are compared to experimental ones measured by time-resolved quantum cascade laser absorption spectroscopy (QCLAS). The agreement between experiment and modelling predictions is very reasonable, mainly until a pulse duration of 2 ms, revealing the temporal evolution of the most important creation and loss mechanisms of NO(X). Simulations show a slow gas heating during the first millisecond. Thereafter, gas heating is accelerated and levels off at a time ~ 40 ms. These effects are explained and discussed in detail, together with the analysis of the fraction of the discharge power transferred to gas heating.
© EDP Sciences, 2016
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.