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Top hat electrostatic analyzer for far-field electric propulsion plume diagnostics
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Image of FIG. 1.
FIG. 1.

Major components and a typical ion trajectory for a top hat electrostatic analyzer.

Image of FIG. 2.
FIG. 2.

Number density and energy of typical space, laboratory, and electric propulsion plasmas.

Image of FIG. 3.
FIG. 3.

(Color online) Principal design parameters of a top hat analyzer.

Image of FIG. 4.
FIG. 4.

(Color) Computer-aided design model of TOPAZ in PRO/ENGINEER.

Image of FIG. 5.
FIG. 5.

(Color online) Final construction of TOPAZ.

Image of FIG. 6.
FIG. 6.

Optimum deflection and top hat plate voltages as a function of beam energy.

Image of FIG. 7.
FIG. 7.

(Color online) Guiding plate test setup inside the vacuum chamber.

Image of FIG. 8.
FIG. 8.

Optimum guiding plate voltage as a function of elevation angle for a beam. A positive elevation angle corresponds to a particle entering TOPAZ from above the aperture.

Image of FIG. 9.
FIG. 9.

Energy distribution for plate setting.

Image of FIG. 10.
FIG. 10.

Energy profile measured by TOPAZ for the NASA-173Mv1 Hall thruster operating at and .


Generic image for table
Table I.

Physical characteristics of TOPAZ.


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Scitation: Top hat electrostatic analyzer for far-field electric propulsion plume diagnostics