用H_α光谱测量方法研究简单磁镜装置中热电子等离子体的性质

INVESTIGATION ON PROPERTIES OF HOT ELECTRON PLASMA IN THE MM-2 MIRROR BY H_α EMISSION SPECTRA MEASUREMENT

本文描述了简单磁镜装置中微波加热的氢等离子体的Ｈ_α面发光度特性的实验结果。与Ｘ射线、反磁探针、朗缪尔探针等测量结果相结合，给出了ＭＭ－２简单磁镜装置中ＥＣＲ等离子体的一些基本特性。

The Ha emission from ECRH plasma in the MM-2 simple mirror device were measured by using Ha spectroscopy. This method along with the Langmuir probe. X-ray detector and diamagnetic probe etc, gives the preionization and time features of the Ha emission of ECRH plasma. The results show that the Ha emission emerges before the build-up of a hot electron ring but still exists after the break-down of the ring. The decay time constant of the Ha emission is larger than that of the hot electron ring. The results are consistent with those measured with a X-ray detector.