A one-dimensional fluid model of a dielectric-barrier discharge (DBD) in Ar–S₂ mixtures is developed, and the properties of the discharge are modeled. The discharge in a 3-mm-long gas gap between 2-mm-thick quartz layers covering metal electrodes is considered. The DBD spatiotemporal characteristics are simulated at gas pressures of 300 Torr for the case in which a 20-kHz harmonic voltage with amplitude of 8 kV is applied to electrodes. It was shown that the discharge active phase at S₂ fraction of 0.1% in Ar–S₂ mixture is characterized by the presence of multiple current spikes, which is explained by weak ionization waves. The cycle-averaged dissociation degree of S₂ molecules is ~ 0.05–0.3% in Ar–S₂ mixture with S₂ fraction of 0.1–1% and degree of gas ionization is 2 × 10^–8–4 × 10^–7. The plasma is electronegative due to the fast attachment of electrons to sulfur molecules: e + S₂ → S₂^–. The radiative efficiency of S₂* excited molecules at S₂ fraction of 0.5 and 1% is about two times higher than at S₂ fraction of 0.1% and reaches about 0.8%. At S₂ content in Ar–S₂ mixture of 0.1% the main contribution in the discharge emission make argon resonance atoms (70%), while at 1%S₂ the main contribution in the emission make sulfur excited atoms (95%), which radiative efficiency abruptly increases. The optimal S₂ fraction in Ar–S₂ mixture for developing DBD radiation source based on emission of S₂* molecules is about 0.5%, when the 98% of discharge emission distributes between Ar* (44%), S₂* (42%) and Ar₂* (12%).

建立了Ar–S ₂混合物中介电势垒放电（DBD）的一维流体模型，并对放电特性进行了建模。考虑在覆盖金属电极的2毫米厚石英层之间的3毫米长气隙中放电。对于在电极上施加振幅为8 kV的20 kHz谐波电压的情况下，在气压为300 Torr的情况下，模拟了DBD时空特性。结果表明，在Ar–S ₂混合物中，S ₂含量为0.1％时的放电活性相的特征在于存在多个电流尖峰，这可以用弱电离波来解释。在Ar–S _2中，S ₂分子的循环平均解离度为〜0.05–0.3％S ₂分数为0.1–1％且气体电离度为2×10 ^–8 –4×10 ^{–7的混合气}。由于电子与硫分子的快速附着，等离子体具有负电性：e  + S ₂  →S ₂ ^–。S ₂分数为0.5和1％时，S ₂ *激发分子的辐射效率大约是S ₂分数为0.1％时的辐射效率的两倍，并达到约0.8％。在Ar–S ₂混合物中的S ₂含量为0.1％时，放电发射的主要成分是氩气共振原子（70％），而在1％的S _2中发射的主要贡献是使硫激发的原子（95％）急剧增加。当98％的放电发射分布在Ar *（44％），S ₂ *（42 ）之间时，基于S ₂ *分子的发射，用于开发DBD辐射源的Ar–S ₂混合物中的最佳S ₂分数约为0.5％。％）和Ar ₂ *（12％）。