Spatially resolved optical-emission spectroscopy of a radio-frequency driven iodine plasma source
POSTER
Abstract
Iodine is of interest for potential use as a propellant for spacecraft propulsion, and has become attractive as a replacement to xenon due to its similar mass and ionisation potential. Optical emission spectroscopy has been undertaken to characterise the emission from a low-pressure, radio-frequency driven inductively coupled plasma source operating in iodine with respect to axial distance across its transverse magnetic filter. The results are compared with axial profiles of the electron temperature and density for identical source conditions, and the spatial distribution of the emission intensity is observed to be closely correlated with the electron temperature.
*This work has been done within the LABEX Plas@Par project, and received financial state aid managed by the "Agence Nationale de la Recherche", as part of the "Programme d'Investissements d'Avenir" under the reference ANR-11-IDEX-0004-02.