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In gridded electrostatic plasma thrusters, an ion current is extracted from a primary plasma and later accelerated to impart thrust. The operation modes are strongly influenced by the neutralization of the ion current which otherwise becomes space charge limited. This neutralization process is investigated in a small diameter ring cusp ion thruster by using both collecting and emissive Langmuir probes...
The measurement of the plasma potential of unmagnetized Maxwellian plasmas by using the floating potential of emissive Langmuir probes is discussed. The temperature of the probe was monitored in order to estimate the emitted thermoionic electron current and to determine the limits of the strong electron emission regime. Under these ideal conditions, the measurements of the plasma potential of the...
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