Abstract Optical properties of plasmas are determined by presence of fluctuating microscopic electric field. The present work provides thorough analysis of contemporary models and points out their shortcomings. To overcome the latter, we take the QUIP (QUasi-Independent Particles) model derived ab initio. We provide generalization of the model allowing to account for microfield heterogeneity up to octupole term. We investigate convergence of the multipole series and show that higher order terms can be neglected. The model does not require laborious computations because all formulae are rather simple and are given in explicit form. This fact is an advantage of the proposed model compared to other contemporary models. We perform verification of the model via comparison with experiments. We emphasize that the comparison should be made with respect to the number of observed lines because this number strongly depends on the selected model. We outline experiments suitable for such testing. These are the experiments on Ar+Kr radiating plasma heated by laser radiation. In these experiments, the entire Ar + 16 spectral series is observed. The QUIP model correctly describes the number of observed lines of the series, so its adequateness is justified.

中文翻译：

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QUIP模型描述等离子体的异质等离子体微场和光学特性

摘要 等离子体的光学特性是由波动的微观电场的存在决定的。目前的工作对当代模型进行了彻底的分析并指出了它们的缺点。为了克服后者，我们采用从头推导的 QUIP（QUasi-Independent Particles）模型。我们提供了模型的泛化，允许解释高达八极项的微场异质性。我们研究了多极级数的收敛性，并表明可以忽略高阶项。该模型不需要费力的计算，因为所有公式都相当简单并且以明确的形式给出。与其他当代模型相比，这一事实是所提出模型的优势。我们通过与实验的比较来验证模型。我们强调应该对观察到的线的数量进行比较，因为这个数量在很大程度上取决于所选的模型。我们概述了适合此类测试的实验。这些是用激光辐射加热的 Ar+Kr 辐射等离子体的实验。在这些实验中，观察到整个 Ar + 16 光谱系列。QUIP 模型正确地描述了该系列的观察线数，因此其充分性是合理的。