Thermionic Emission and Space-Charge Theory.
Final rept. 1 Oct 76-30 Dec 80,
AIR FORCE WRIGHT AERONAUTICAL LABS WRIGHT-PATTERSON AFB OH
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The work presented in this report extends the space-charge theory of parallel-plane diodes in several ways. Space-charge effects are included in the accelerating field range to remove the incompatibility between Langmuir theory and Schottky theory. A method is developed to use a measurement of the current density at the exponential point to calculate the zero field current density of the cathode. This is done without the necessity of matching data to a family of curves. A number of properties of Langmuir space-charge theory is described in much greater detail than has previously been done through the use of functional notation to express the current density as a function of the applied voltage. Some of these details are brought out in a discussion of the fields and charge in the interelectrode space. As a side light, a method is developed to handle the edge effects in a class of parallel-plane diode testers. Author
- Electrical and Electronic Equipment
- Electricity and Magnetism