Raman spectrum shows that with the increase of the discharge current, the intensity of the Raman peak is aggrandized and the FWHM is deceased.There is not Graphite peak at 1580cm-1.

• 对Raman谱分析得出：随放电电流的增加，金刚石的散射峰逐渐尖锐，半高宽逐渐减小，在1580cm-1处没有明显的晶态石墨特征峰。