This research proposed an experimental method to predict plasma properties in fluorescent lamps with the aid of electromagnetic (EM) wave propagation. A set of power‐controllable fluorescent lamps are placed between two antennas as a layered plasma medium. The electron density of plasma was adjusted through luminance control of the fluorescent lamps, and the transmission of the EM wave through the area occupied by plasma was achieved. The EM wave reflection and transmission through the plasma area were experimentally measured. By using the time‐domain experimental method, and with aid of the Fourier transformation, EM wave changes in the phase and variance in the intensity are tested. The plasma collision frequency and electron density are then mathematically derived based on the EM wave scattering model theory in unmagnetized plasma. This research provides an experimental approach to predict the plasma properties and diagnose the interaction between EM waves and plasma. The proposed experimental method can be implemented with other types of antennas and extended to a wide range of circumstances, such as monitoring the discharge changes in other plasma sources.

中文翻译：

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在电磁波辐射下使用功率可控的荧光灯预测等离子体的性质

这项研究提出了一种实验方法，借助电磁波（EM）传播来预测荧光灯中的等离子体特性。一组功率可控的荧光灯放置在两个天线之间，作为分层的等离子体介质。通过控制荧光灯的亮度来调节等离子体的电子密度，并且实现了EM波通过等离子体所占据的区域的透射。实验测量了电磁波在等离子体区域的反射和透射。通过使用时域实验方法，并借助傅立叶变换，测试了EM波的相位变化和强度变化。然后，基于EM波散射模型理论，在未磁化等离子体中以数学方式得出等离子体的碰撞频率和电子密度。这项研究提供了一种实验方法来预测等离子体特性并诊断EM波与等离子体之间的相互作用。所提出的实验方法可以用其他类型的天线来实现，并且可以扩展到广泛的情况下，例如监视其他等离子体源中的放电变化。