Abstract
Emission from an array of dissimilar field emitters are known to produce non-uniform patterns that affect space charge forces within the electron beam produced, with consequences on emittance and transit time effects. To model variation, a semi-analytical Point Charge Model (PCM) gives rapid and analytical representations of tip current, variation, and emission statistics to be used in the MICHELLE Particle-In-Cell (PIC) code. A General Thermal-Field (GTF) emission model accounts for warm and hot field emission sources. The consequences of non-uniform space charge on emittance shall be investigated.
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