Abstract
The current voltage characteristics of continuum flush-mounted electrostatic probes are analyzed in the presence of negative ions. For equal electron and heavy particle temperatures, negative ions modify the ambipolar region but leave the sheath solution unchanged. The results show that negative ions suppress the electron saturation current considerably and increase the positive ion saturation current slightly. Decreasing the negative ion mobility increases the positive saturation current and further suppresses the negative saturation current. The effect of unequal electron and ion temperatures is discussed in some detail.
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