Optical emission spectroscopy observations of fast pulsed capillary discharge plasmas

15th International Congress on Plasma Physics; 13th Latin American Workshop on Plasma Physics

Avaria, G.^1,2 ; Ruiz, M.^1 ; Guzmán, F.^1 ; Favre, M.^1 ; Wyndham, E.S.^1 ; Chuaqui, H.^1 ; Bhuyan, H.^1

Departamento de Fisica, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile^1

NSF ERC for Extreme Ultraviolet Science and Technology, Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO 80523, United States^2

关键词: Capillary plasma;    Optical emissions;    Pulsed capillary discharges;    Pulsed discharge;    Stark broadenings;    Time evolutions;    Time resolution;    Time-resolved;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/511/1/012034/pdf
DOI  :  10.1088/1742-6596/511/1/012034

来源: IOP

【 摘 要 】

We present time resolved optical emission spectroscopic (OES) observations of a low energy, pulsed capillary discharage (PCD). The optical emission from the capillary plasma and plasma jets emitted from the capillary volume was recorded with with a SpectraPro 275 spectrograph, fitted with a MCP gated OMA system, with 15 ns time resolution. The discharge was operated with different gases, including argon, nitrogen, hydrogen and methane, in a repetitive pulsed discharge mode at 10-50 Hz, with, 10-12 kV pulses applied at the cathode side. The time evolution of the electron density was measured using Stark broadening of the Hβline. Several features of the capillary plasma dynamics, such as ionization growth, wall effects and plasma jet evolution, are inferred from the time evolution of the optical emission.