Scaled form for kernel Fowler-Nordheim-type expression based on the Schottky-Nordheim barrier, and test for orthodoxy of field electron emission

This conference paper supports an overview presented elsewhere in this conference, by setting out detailed theory about the concept of "kernel current density", and about the development of a simple numerical test for (lack of) emission orthodoxy. The test can be applied to any form of linear (or nearly linear) Fowler-Nordheim plot.