摘要: 对通过磁过滤阴极真空弧(FCVA) 获得的高密度、高离化率的等离子体进行诊断。为研究C2H2 气流量对磁过滤阴极弧产生的等离子体的影响，采用原子发射光谱(OES) 法对FCVA沉积过程中产生的TiC 等离子体进行诊断。利用Saha-Boltzmann 方法对不同气流量下等离子体的参数进行计算，并对等离子体产生过程中的谱线强度随气流量变化的机制进行研究。结果表明，等离子体电离度较高，约为0.8 左右且随气流量的变化不大；电子温度和电子密度分别在1104 2104 K和1023 1024 m*3 范围内变化，且随着气流量的增加呈现出先增大后减小的变化趋势；Ti 粒子谱线相对强度随气流量的变化不大，表明Ti 粒子大部分在阴极弧斑附近被离化。

Optical diagnostics of high density and ionization plasma generated by Filter cathodic arc vacuum arc(FCVA) technique were investigated in this paper. The effects of acetylene flow rate on the plasma parameter of TiC were also been studied by optical emission spectroscopy. The plasma parameters were calculated using Saha-Boltzmann method. Results show that the plasma has high degree of ionization, and there is little effect of the acetylene flow rate on ionization degree. The electron temperature ranges from 1104 to 2104 K, the electron density ranges from 1023 to 1024 m*3, and they all increase firstly and then decrease, with the increase of the acetylene flow rate. The relative intensity of the Ti varies little as the flow rate increases, which indicate that most of Ti plasma was ionized around the cathodic arc spot.