Near-field laser-induced fluorescence velocimetry of neutral xenon in a 6-kW Hall thruster plume
نویسندگان
چکیده
We present laser-induced fluorescence (LIF) measurements of neutral xenon (6s [3/2]2) in the near-field plume of a 6-kW Hall thruster. The 823.163 nm (air) beam from a TUI Optics TA-100/830 tapered-amplifier diode laser is focused along an axial beamline onto a submillimeter interrogation volume, from which we collect resonant LIF. Polarization control via a rotating half-wave plate keeps the input beam polarization parallel to the magnetic field, minimizing distortion of the LIF spectrum by Zeeman splitting in regions of high magnetic field intensity. Doppler velocimetry of LIF spectra taken at the discharge channel exit returns bulk axial velocities at discharge voltages of 53 to 300 V and mass flow rates of 5 through 17.5 mg/s.
منابع مشابه
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