A State-to-State Model for High-Temperature N$_{2}$-CH$_{4}$ Plasmas

Since the landing of the space probe Huygens on the surface of Titan in 2005, a renewed interest exists for studies of N$_{2}$-CH$_{4}$ Plasmas. The atmosphere of Titan is composed from 98{\%} N$_{2}$-2{\%} CH$_{4}$ and therefore, chemical kinetics involving the N$_{2}$ molecule is predominant. In particular, the reaction CN+N $<->$ N$_{2}$+C is known to significantly affect the radiation of the CN Violet system, which is often considered as an important system for diagnostics of these plasmas. This reaction depends strongly from the concentration of atomic N, which in turn is correlated to the dissociation dynamics of N$_{2}$. In this work we show that the application of an improved multiquantum FHO model for dissociation, as opposed to the traditional first-order SSH approach, improves the predicted concentrations of the radiative states of CN.