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Title: Space-charge effects in Spindt-type field emission cathodes

Abstract

The field emission characteristic of a Spindt-type cathode, cleaned extensively in a hydrogen atmosphere while emitting, is considered. The maximum emission reached is about 800 {mu}A. At high current levels the I-V curve clearly deviates from a Fowler-Nordheim behavior. This can be explained by the occurrence of space charge. Several models are considered to simulate the experimental results. The fit to the data is good except at the highest emission levels. In this region the difference between the measured currents and the simulation results is due to the neglect of the variation of the field on top of the tip in the presence of space charge. 15 refs., 14 figs.

Authors:
 [1]
  1. Philips Research Labs., Eindhoven (Netherlands)
Publication Date:
OSTI Identifier:
136246
Resource Type:
Journal Article
Journal Name:
Journal of Vacuum Science and Technology. B, Microelectronics Processing and Phenomena
Additional Journal Information:
Journal Volume: 12; Journal Issue: 2; Other Information: PBD: Mar-Apr 1994
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; FIELD EMISSION; SPACE CHARGE; CATHODES; CURRENT DENSITY

Citation Formats

van Veen, G.N.A.. Space-charge effects in Spindt-type field emission cathodes. United States: N. p., 1994. Web. doi:10.1116/1.587407.
van Veen, G.N.A.. Space-charge effects in Spindt-type field emission cathodes. United States. doi:10.1116/1.587407.
van Veen, G.N.A.. Tue . "Space-charge effects in Spindt-type field emission cathodes". United States. doi:10.1116/1.587407.
@article{osti_136246,
title = {Space-charge effects in Spindt-type field emission cathodes},
author = {van Veen, G.N.A.},
abstractNote = {The field emission characteristic of a Spindt-type cathode, cleaned extensively in a hydrogen atmosphere while emitting, is considered. The maximum emission reached is about 800 {mu}A. At high current levels the I-V curve clearly deviates from a Fowler-Nordheim behavior. This can be explained by the occurrence of space charge. Several models are considered to simulate the experimental results. The fit to the data is good except at the highest emission levels. In this region the difference between the measured currents and the simulation results is due to the neglect of the variation of the field on top of the tip in the presence of space charge. 15 refs., 14 figs.},
doi = {10.1116/1.587407},
journal = {Journal of Vacuum Science and Technology. B, Microelectronics Processing and Phenomena},
number = 2,
volume = 12,
place = {United States},
year = {1994},
month = {3}
}