Onset of space charge limited current for field emission from a single sharp tip

A protrusive model of the Child-Langmuir (CL) law is proposed for non-uniform electron field emission from a sharp tip of either Lorentzian or hyperboloid shape. The model is expressed as Jc = μ×J1D at large electric field higher than a critical value Ec, and J1D is the classical one-dimensional CL...

Full description

Saved in:

Bibliographic Details
Main Authors:	Sun, Sheng, Ang, Ricky Lay Kee
Other Authors:	School of Electrical and Electronic Engineering
Format:	Article
Language:	English
Published:	2013
Subjects:	DRNTU::Engineering::Electrical and electronic engineering
Online Access:	https://hdl.handle.net/10356/79943 http://hdl.handle.net/10220/10216
Tags:	Add Tag No Tags, Be the first to tag this record!
Institution:	Nanyang Technological University
Language:	English

id	sg-ntu-dr.10356-79943
record_format	dspace
spelling	sg-ntu-dr.10356-799432020-03-07T13:57:22Z Onset of space charge limited current for field emission from a single sharp tip Sun, Sheng Ang, Ricky Lay Kee School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering A protrusive model of the Child-Langmuir (CL) law is proposed for non-uniform electron field emission from a sharp tip of either Lorentzian or hyperboloid shape. The model is expressed as Jc = μ×J1D at large electric field higher than a critical value Ec, and J1D is the classical one-dimensional CL law. It is found that the enhancement μ over the 1D CL law depends only on the calculated field enhancement factor (β) of the emitter and is independent of the work function and gap spacing. In particular, μ increases with β and it converges to a constant at β≫ 1 for a very sharp tip with small emission area. Published version 2013-06-12T02:00:00Z 2019-12-06T13:37:17Z 2013-06-12T02:00:00Z 2019-12-06T13:37:17Z 2012 2012 Journal Article Sun, S., & Ang, L. K. R. (2012). Onset of space charge limited current for field emission from a single sharp tip. Physics of plasmas, 19(3). 1070-664X https://hdl.handle.net/10356/79943 http://hdl.handle.net/10220/10216 10.1063/1.3695090 en Physics of plasmas © 2012 American Institute of Physics. This paper was published in Physics of Plasmas and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.3695090]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf
institution	Nanyang Technological University
building	NTU Library
country	Singapore
collection	DR-NTU
language	English
topic	DRNTU::Engineering::Electrical and electronic engineering
spellingShingle	DRNTU::Engineering::Electrical and electronic engineering Sun, Sheng Ang, Ricky Lay Kee Onset of space charge limited current for field emission from a single sharp tip
description	A protrusive model of the Child-Langmuir (CL) law is proposed for non-uniform electron field emission from a sharp tip of either Lorentzian or hyperboloid shape. The model is expressed as Jc = μ×J1D at large electric field higher than a critical value Ec, and J1D is the classical one-dimensional CL law. It is found that the enhancement μ over the 1D CL law depends only on the calculated field enhancement factor (β) of the emitter and is independent of the work function and gap spacing. In particular, μ increases with β and it converges to a constant at β≫ 1 for a very sharp tip with small emission area.
author2	School of Electrical and Electronic Engineering
author_facet	School of Electrical and Electronic Engineering Sun, Sheng Ang, Ricky Lay Kee
format	Article
author	Sun, Sheng Ang, Ricky Lay Kee
author_sort	Sun, Sheng
title	Onset of space charge limited current for field emission from a single sharp tip
title_short	Onset of space charge limited current for field emission from a single sharp tip
title_full	Onset of space charge limited current for field emission from a single sharp tip
title_fullStr	Onset of space charge limited current for field emission from a single sharp tip
title_full_unstemmed	Onset of space charge limited current for field emission from a single sharp tip
title_sort	onset of space charge limited current for field emission from a single sharp tip
publishDate	2013
url	https://hdl.handle.net/10356/79943 http://hdl.handle.net/10220/10216
_version_	1681040549927190528

Onset of space charge limited current for field emission from a single sharp tip

Similar Items