An Investigation into the Spectral Imaging of Hall Thruster Plumes
AIR FORCE RESEARCH LAB EDWARDS AFB CA ROCKET PROPULSION DIV
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An exploratory investigation of measuring xenon spectral emission lines in a Hall thruster plume through optical imaging techniques was performed on the SPT-100 Hall thruster. A 16 bit CCD camera was used with optical interference bandwidth filters to separately photograph neutral 823 nm and ion 542 nm xenon emission. The resulting images allowed for examination of the near-plume structure in terms of excited ions and neutral particles for various thruster operating conditions. Abel inversion analysis was applied to the photographs to examine the emission as a function of radius with the assumption of axial symmetry and optically thin plasma. This experimental technique may provide results useful for comparison with numerical near-plume predictions that incorporate collisional radiative models.
- Electric and Ion Propulsion