Experimental results: (I, Q) components attenuation vs the frequency difference between S(t) and R(t).
Phase error versus the input signal attenuation. 0 dB corresponds to 2 Vpp.
Example of ray tracing calculation.
Test of slab approximation using a Plexiglas cube with cylindrical hole. D is the diameter of the hole, w the width of the Plexiglas and the distance between the horns, A is the horn aperture, and L its length.
Ray tracing calculation (solid line) end experimental measurements (full circles) of the phase shift of cylindrical holes in Plexiglas block plotted versus the hole diameters.
Phase shift due to plasma cylinder versus cylinder diameter for various density, calculated by ray tracing (red thick line) and by slab approximation (thin gray line).
Phase shift due to plasma cylinder versus the plasma density, for various plasma diameters, calculated by ray tracing (red thick line) and by slab approximation (thin gray line).
Phase noise spectrum of the interferometer.
RF plasma source layout along with the magnetic field topology.
Phase and normalized amplitude change at the plasma start-up.
Picture of the interferometer installed on the mini helicon space thruster.
Mass flow scan experiment, at fixed power (50 W).
Mass flow and power scan in a different thruster configuration.
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