The current-voltage characteristics, the structure of electric potential around an ion sensitive probe and the particle flux on the ion collector have been simulated by the two dimensional particle-in-cell code (Berkeley Code). Concerning the separate mechanism of ions and electrons on the probe, the importance of electric potential profile around the electrode was pointed out. It was found that the E × B drift motion of electrons moving along the equipotential surface plays an essential role in the ISP measurement.
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N. Ezumi (2001) studied this question.
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