Thermal field emission from a log-normal distribution: Impact on space charge and emittance

Author

Jensen, Kevin L. ; Petillo, John J. ; Panagos, Dimitrios N.

Author_Institution

Naval Res. Lab., Washington, DC, USA

fYear

2013

fDate

8-12 July 2013

Firstpage

1

Lastpage

2

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.

Keywords

electron beam effects; field emitter arrays; log normal distribution; space charge; GTF emission model; MICHELLE particle-in-cell code; PCM; PIC code; dissimilar field emitters; electron beam; emission statistics; general thermal-field emission model; hot field emission sources; log-normal distribution; nonuniform patterns; nonuniform space charge; semianalytical point charge model; space charge forces; space emittance; thermal field emission; time effects; warm field emission sources; Analytical models; Arrays; Cathodes; Log-normal distribution; Phase change materials; Photoelectricity; Space charge;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Nanoelectronics Conference (IVNC), 2013 26th International

Conference_Location

Roanoke, VA

Type

conf

DOI

10.1109/IVNC.2013.6624716

Filename

6624716