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

Table 4

Ratio of the impingement current of the accelerator grid to the beam current without CEX ions.

Density	(μA)		(μA)		(%)
	2-grid	3-grid	2-grid	3-grid	2-grid	3-grid
0.05	7.8349	7.8348	0.1211	0.1277	1.5455	1.6304
0.075	11.8554	11.8585	0.1255	0.1282	1.0587	1.0808
0.15	24.2087	24.2102	0.0354	0.0360	0.1460	0.1487
0.2	32.2510	32.2554	0.0055	0.0064	0.0166	0.0199
0.25	38.5102	38.5018	0.0001	0.0000	0.0000	0.0000
0.5	79.3658	78.0667	0.0000	0.0000	0.0000	0.0000
0.75	113.9897	110.8854	0.0000	0.0000	0.0000	0.0000
1.0	147.5525	146.1607	0.0000	0.0000	0.0000	0.0000
1.5	189.3685	189.2688	0.0000	0.0000	0.0000	0.0000
2.0	271.9309	271.9175	0.0000	0.0000	0.0000	0.0000