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- W4229071790 abstract "A miniaturized thruster with a wide tuning range of thrust plays an important role for the drag-free control in the task of space-borne gravitational wave detection. For the design of a high-precision miniaturized thruster, it is necessary to study the spatial distribution of the electron density in its discharge chamber. This work investigates the electron density distribution in an ECR ion thruster of 2-cm diameter, with the input microwave power and mass flow rate tuned in a wide range. At relatively low power and flow rate, there is a peak of electron density at the radial position r = 4 mm, which is around the region of resonant power absorption. However, the density distribution in the center region becomes flat with the increase of power and flow rate; at high power and flow rate, it tends to be a Bessel function with a peak in the center ( r = 0 mm). In the view of tuning of thrust, it is found that the above variation of electron density distribution can be as important as (or even more important than) the variation of peak value of electron density. A further discussion on the influence of the evolution of electron density distribution is given by considering the thruster design, operation, and control for the task of space-borne gravitational wave detection. • The radial distribution of electron density is determined by an OES method for an ECR ion thruster tuned in a wide range. • The radial distribution of electron density evolves from the double-peak to the flat and single-peak with the increase of power and flow rate. • The variation of distribution affects the thrust from each hole, which playing a critical role in the high-precision tasks." @default.
- W4229071790 created "2022-05-08" @default.
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- W4229071790 date "2022-08-01" @default.
- W4229071790 modified "2023-10-05" @default.
- W4229071790 title "Investigation on the radial distribution of electron density in a miniaturized ECR ion thruster of wide-range operations" @default.
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- W4229071790 doi "https://doi.org/10.1016/j.vacuum.2022.111138" @default.
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