Plasma Characteristics of Single Aluminum Wire Electrically Exploded in High Vacuum

摘要

In this paper, the plasma generated by the electrical explosion of a single aluminum wire in high vacuum is investigated, through self-emission spectrum in the range of near UV to visible wavelength (347.5–477.6 nm) captured by imaging spectrometer with the duration of the spectrometer time frame of 3 ns. Electron temperature and density of the plasma are determined through the spectrum using Boltzmann Plot and Stark Broadening Effect of isolated lines of Al III. The results show that the electron temperature in the plasma is in the range of 3.7–8.6 eV and the electron density has the order of magnitude about $10^{18}~{rm cm}^{-3}$. Population inversion of Al II is found according to the intensity of the isolated lines in the spectra.