## 3 Results and Discussion
### The Propagation of Electromagnetic Waves in Plasma  
Plasma is a collection of charged particles composed of free electrons, ions, and neutral particles. When electromagnetic waves enter the plasma, the electric and magnetic fields of the waves act on the free electrons in the plasma, causing them to accelerate. This acceleration is not only the basis for the propagation of electromagnetic waves in plasma but also a direct manifestation of the plasma's response to electromagnetic waves. Additionally, within the plasma, the free electrons, influenced by the electromagnetic waves, generate new electromagnetic waves as their acceleration changes. This occurs because the accelerated motion of any charged particle can produce electromagnetic radiation. Thus, the free electrons in the plasma not only respond to the incoming electromagnetic waves but also generate electromagnetic waves through their motion, creating an interactive process. Plasma can be considered a special type of dielectric that can conduct current and respond to electromagnetic waves. Under the influence of electromagnetic waves, the current formed by the motion of electrons in the plasma interacts with the incoming electromagnetic waves, affecting their propagation characteristics, such as speed, direction, reflection, refraction, and absorption. The interaction between plasma and electromagnetic waves adheres to [PERSON]'s equations:  
\[\left\{ \begin{aligned} \
abla\times\overset{-}{E}=-j\mu_{0} \omega\overset{\rightarrow}{H}\\ \
abla\times\overset{-}{H}=j\varepsilon_{0}\varepsilon_{r}\omega \overset{-}{E}\\ \
abla\cdot\overset{-}{H}=0\end{aligned} \right. \tag{4}\]  
where \(\overset{-}{E}\) represents the electric field strength, \(\mu_{0}\) represents the vacuum permeability, \(\overset{-}{H}\) represents the magnetic field strength, \(\varepsilon_{0}\) represents the vacuum permittivity, and \(\varepsilon_{r}\) represents the relative permittivity of the plasma; the following equations apply:  
\[\varepsilon_{r}=1-\frac{\omega_{p}^{2}}{\omega(\omega-jv)}=1-\frac{\omega_{p} ^{2}}{\omega^{2}+v^{2}}-j\frac{v}{\omega}\frac{\omega_{p}^{2}}{\omega^{2}+v^{2}} \tag{5}\]  
where \(v\) represents the collision frequency of the plasma, and \(\omega_{p}\) represents the plasma frequency. For electromagnetic waves, the following applies:  
\[\overset{-}{E}=\overset{-}{E}\omega\overset{-}{e}j(\omega t-\overset{-}{k }\cdot\overset{-}{r}) \tag{6}\] \begin{table}
\begin{tabular}{c c c} \hline \hline \multirow{2}{*}{**Metallic Materials**} & **Thermal Conductivity** & **Specific Heat Capacity** \\  & **(W/m\(\cdot\)K)** & **(kJ/kg\(\cdot\)K)** \\ \hline W & 173 & 0.13 \\ Fe & 80 & 0.45 \\ Ni & 8 & 0.46 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Thermal conductivity and specific heat capacity of metallic materials. where \(\stackrel{{\rightharpoonup}}{{k}}\) represents the propagation vector of the electromagnetic wave; the [PERSON]'s equations are given by:  
\[\left\{ \begin{array}{c}\stackrel{{\rightharpoonup}}{{k}}\times \stackrel{{\rightharpoonup}}{{\Sigma}}=\mu_{0}\omega\stackrel{{ \rightharpoonup}}{{H}}\\ \stackrel{{\rightharpoonup}}{{k}}\times\stackrel{{ \rightharpoonup}}{{H}}=-\epsilon_{0}\epsilon_{r}\omega\stackrel{{ \rightharpoonup}}{{E}}\\ \stackrel{{\rightharpoonup}}{{k}}\cdot\epsilon_{0}\epsilon_{r} \stackrel{{\rightharpoonup}}{{E}}=0\\ \stackrel{{\rightharpoonup}}{{k}}\cdot\stackrel{{ \rightharpoonup}}{{H}}=0\end{array} \right.