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High‐Field Ion Collection by a Spherical Direct‐Current Probe
Author(s) -
Balmain K. G.
Publication year - 1970
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs005i003p00565
Subject(s) - current (fluid) , voltage , ion , ion current , electric field , physics , atomic physics , direct current , gas pressure , power (physics) , field (mathematics) , computational physics , materials science , mechanics , optics , mathematics , quantum mechanics , thermodynamics , petroleum engineering , pure mathematics , engineering
An integral expression for the current‐voltage relationship of a spherical dc probe is derived assuming that the ambient gas pressure is high and that the probe potential is large and negative. The analysis applies to any gas in which the ion velocity is proportional to the applied electric field strength raised to an arbitrary power. A simplified current‐voltage relationship applicable to small probes is also derived.