The performance of a novel neutralizer for space applications based on a E
×
B discharge
is presented. Preliminary tests were carried out with argon gas and flow rates in the
range of 5-10 SCCM. Electrons were extracted through an orifice of diameter 1.8 mm. The
maximum extracted current versus input power reported was 2.4 mA/W. The total power
input, given by the sum of discharge power plus the extraction power, was in the range of
40-90 W. During extraction tests, the discharge current was limited at 0.2 A due to limit
in the cooling system. Future work will be focused on tests at various extraction orifice
diameters and cathode materials. Ultimately, xenon and non-conventional gases would be
tested as working gases.