Influence of the Decelerator Grid on the Optical Performance of the Ion Thruster

Table 11

Proportion of downstream reflux CEX ions impinging on the aperture barrel and the downstream surface.

Density	Aperture barrel		Downstream surface
	2-grid	3-grid	2-grid	3-grid
0.075	5.4%	85.6%	94.7%	14.4%
0.2	2.8%	69.2%	97.2%	30.8%
0.75	4.6%	27.2%	96.4%	72.8%
2.0	5.9%	11.1%	93.3%	88.9%