The discharge in mixtures of inert gas with sulfur vapors is an effective source of radiation spectrum, which is similar to solar in the wavelength range of 280–600 nm due to strong emission of S 2 molecules ( $$ B{}^{3}\varSigma \to X{}^{3}\varSigma $$ B 3 Σ → X 3 Σ -transition). This phenomenon is utilized in microwave sulfur lamp. Despite a number of advantages microwave sulfur lamps have disadvantages that prevent their widespread use. This paper presents optical properties of the pulsed-periodic discharge in mixtures of argon with sulfur vapour in UV and visible spectral region and a global model of the discharge. Emission of the pulsed-periodic discharge in argon–sulfur vapour mixtures was studied at argon pressure up to 100 Torr and pressure of sulfur saturated vapors determined by temperature of gas-discharge tube walls varied due self-heating from the room temperature up to 160 °C. It is shown that strong band of S 2 molecules are observed in the discharge emission in the wavelength range of 300–600 nm and S and Ar lines are predominate in the wavelength range of 600–1000 nm. Effect of the discharge conditions on emission spectra was investigated. Time profiles of plasma species densities under various Ar–S 2 mixture compositions and voltage pulse up to 15 kV with duration ~ 10 μs were calculated using the global model. It is shown, that densities of S 2 * molecules fast increases at the voltage pulse beginning and reach maximum after ~ 2 μs, so strong radiation of S 2 * is characteristic for the time interval, then S 2 * density fast decreases.

中文翻译：

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氩气与硫蒸气混合中的脉冲周期性放电

惰性气体与硫蒸气的混合物中的放电是一种有效的辐射光谱来源，由于 S 2 分子的强发射，其在 280-600 nm 的波长范围内类似于太阳 ($$ B{}^{3} \varSigma \to X{}^{3}\varSigma $$ B 3 Σ → X 3 Σ -转换）。这种现象在微波硫灯中被利用。尽管微波硫灯有许多优点，但也存在妨碍其广泛使用的缺点。本文介绍了紫外和可见光谱区中氩与硫蒸气混合物中脉冲周期性放电的光学特性以及放电的全局模型。在氩气压力高达 100 Torr 和硫饱和蒸汽压力下研究了氩-硫蒸汽混合物中脉冲周期性放电的发射，该压力由气体放电管壁的温度决定，由于自加热从室温到 160 ° C。结果表明，放电发射在300-600 nm波长范围内观察到强带S 2 分子，S和Ar谱线在600-1000 nm波长范围内占主导地位。研究了放电条件对发射光谱的影响。使用全局模型计算了在各种 Ar-S 2 混合物组成和高达 15 kV 且持续时间约 10 μs 的电压脉冲下等离子体物质密度的时间分布。结果表明，S 2 * 分子的密度在电压脉冲开始时快速增加，并在~2 μs 后达到最大值，