Absolute, time-resolved populations of N₂(A³Σ_u ⁺, v = 0–5) vibrational levels in high-pressure ns pulse discharge plasmas are measured by Tunable Diode Laser Absorption Spectroscopy (TDLAS). The diffuse plasma is generated by a repetitively pulsed, double dielectric barrier, ns discharge across a 10mm gap in a plane-to-plane geometry, at pressures of up to 400 Torr. The results of TDLAS measurements in nitrogen and in H₂–N₂, O₂–N₂, and NO–N₂ plasmas are compared with kinetic modeling predictions, identifying the mechanisms of N₂(A³Σ_u ⁺) generation and decay during the discharge pulses and in the afterglow. Comparison with the modeling predictions indicates that electron impact dissociation of N₂ from the ground electronic state significantly underpredicts the yield of N atoms. The present data suggest that N₂ dissociation in the plasma also occurs during the energy pooling process in collisions of two N₂(A³Σ_u ⁺) molecules. The results also show that high-pressure, high repetition rate, volume-scalable ns pulse discharges can be used for efficient generation of atomic species for plasma chemical and plasma catalysis syntheses. In an NO–N₂ mixture, it is shown that the N₂(A³Σ_u ⁺) decay is controlled by the rapid energy transfer to NO, resulting in its electronic excitation and UV emission (NO γ bands). The diagnostics used in the present work can be used for the accurate characterization of both high-pressure, low-temperature gas discharge plasmas and high-temperature nonequilibrium flows generated in pulsed facilities such as shock tubes and expansion tunnels.

绝对的，N个时间分辨群₂（A ³ Σ _ü ⁺，v = 0-5）在高压ns脉冲，放电等离子体振动水平是由可调谐二极管激光吸收光谱学（TDLAS）测量。扩散等离子体是由重复脉冲的双介电势垒产生的，ns放电时在平面至平面几何形状中跨越10mm的间隙，压力最高为400 Torr。TDLAS测量在氮气和H中的结果₂ -N ₂，O- ₂ -N ₂，和NO-N _2个等离子体与动力学模型预测相比，确定n的机制₂（A ³ Σ 在放电脉冲期间和余辉期间_u ⁺）的产生和衰减。与建模预测的比较表明，N ₂与基态电子的电子碰撞解离显着地低估了N原子的产率。目前的数据表明N个₂离解在等离子体中时两个N的碰撞能量池处理时，也会发生₂（A ³ Σ _Ù ⁺）分子。结果还表明，高压，高重复率，体积可缩放的ns脉冲放电可用于高效生成原子种类，以进行等离子体化学和等离子体催化合成。在NO–N ₂混合物中，表明N₂（A ³ Σ _Ù ⁺）衰变通过快速能量转移到NO的控制，从而导致在其电子激发和发射UV（NOγ频带）。本工作中使用的诊断程序可用于对脉动设备（如激波管和膨胀隧道）中产生的高压，低温气体放电等离子体和高温非平衡流进行精确表征。