Real-time implementation of the “orthodoxy test” for conformity of current–voltage characteristics with classical field electron emission theory

Abstract: In field electron emission (FE) studies, it is important to check and analyze the quality and validity of results experimentally obtained from samples, using suitably plotted current-voltage [Im(Vm)] measurements. For the traditional plotting method, the Fowler-Nordheim (FN) plot, there exists a so-called "orthodoxy test" that can be applied to the FN plot, in order to check whether or not the FE device/system generating the results is "ideal". If it is not ideal, then emitter characterization parameters deduced from the FN plot are likely to be spurious. A new form of FE Im(Vm) data plot, the so-called "Murphy-Good (MG) plot", has recently been introduced (R.G. Forbes, Roy. Soc. Open Sci. 6 (2019) 190912). This aims to improve the precision with which characterization-parameter values (particularly values of formal emission area) can be extracted from FE Im(Vm) data. The present paper compares this new plotting form with the older FN and Millikan-Lauritsen (ML) forms and makes an independent assessment of the consistency with which slope (and hence scaled-field) estimates can be extracted from an MG plot. It is shown that, by using a revised formula for the extraction of scaled-field values, the existing orthodoxy test can be applied to Murphy-Good plots. The development is reported of a prototype web tool that can apply the orthodoxy test to all three forms of FE data plot (ML, MG and FN). Keywords: Field emission, Field electron emission, Murphy-Good plot, Fowler-Nordheim plot, Millikan-Lauritsen plot, Orthodoxy test.

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Implementation of the orthodoxy test as a validity check on experimental field emission data

Journal of Electrical Engineering ◽

10.2478/jee-2020-0005 ◽

2020 ◽

Vol 71 (1) ◽

pp. 37-42 ◽

Cited By ~ 1

Author(s):

Mohammad M. Allaham ◽

Richard G. Forbes ◽

Alexandr Knápek ◽

Marwan S. Mousa

Keyword(s):

Field Emission ◽

Electron Emission ◽

Web Application ◽

Field Electron Emission ◽

Emission Data ◽

Quantitative Test ◽

Experimental Field ◽

Validity Check ◽

Field Electron ◽

Current Voltage

AbstractIn field electron emission (FE) studies, it is important to check and analyse the quality and validity of experimental current-voltage data, which is usually plotted in one of a small number of standard forms. These include the so-called Fowler-Nordheim (FN), Millikan-Lauritsen (ML) and Murphy-Good (MG) plots. The Field emission orthodoxy test is a simple quantitative test that aims to check for the reasonableness of the values of the parameter “scaled field” that can be extracted from these plots. This is done in order to establish whether characterization parameters extracted from the plot will be reliable or, alternatively, likely to be spurious. This paper summarises the theory behind the orthodoxy test, for each of the plot forms, and confirms that it is easy to apply it to the newly developed MG plot. A simple, new, accessible web application has been developed that extracts scaled-field values from any of these three plot forms, and tests for lack of field emission orthodoxy.

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Real-time verification of current-voltage characteristics conformity to the classical field emission theory by ‘orthodoxy’ test

2015 28th International Vacuum Nanoelectronics Conference (IVNC) ◽

10.1109/ivnc.2015.7225524 ◽

2015 ◽

Author(s):

E.O. Popov ◽

A.G. Kolosko ◽

S.V. Filippov ◽

P.A. Romanov ◽

R.G. Forbes

Keyword(s):

Real Time ◽

Field Emission ◽

Classical Field ◽

Current Voltage ◽

Current Voltage Characteristics

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Investigation of changes in field electron emission characteristics of industrial fine-grained graphite when operated in an argon atmosphere up to 10–2 Pa

Journal of Physics Conference Series ◽

10.1088/1742-6596/2064/1/012107 ◽

2021 ◽

Vol 2064 (1) ◽

pp. 012107

Author(s):

A S Chepusov ◽

A A Komarskiy ◽

S R Korzhenevskiy

Keyword(s):

Electric Field ◽

Electron Emission ◽

Field Enhancement ◽

Field Electron Emission ◽

Emission Properties ◽

Fine Grained ◽

Cold Cathodes ◽

Field Electron ◽

Current Voltage ◽

Technical Vacuum

Abstract Studying of field electron emission properties of carbon cathodes operating under technical vacuum conditions is a promising scientific field. Massive cathode made of commercial fine-grained graphite of MG (Russian abbreviation) grade is being investigated. Experiments on obtaining current-voltage characteristics and long-term testing are being carried out. The emitter made of fine-grained graphite demonstrates good emission properties under technical vacuum conditions. Carbon cathode is capable of operating at pressures up to 2×10–2 Pa. Increased pressure in the vacuum chamber leads to deterioration of cathode emission properties. Electric field enhancement factors were calculated for all stages of studies. Analysis of experimental data demonstrates decrease in enhancement factor due to ion bombardment of cathode surface during exploitation. This results in higher electric field for operation of investigated graphite cold cathodes.

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Analyses of field electron emission Molybdenum current-voltage data using Fowler-Nordheim and Murphy-Good plots

10.1109/ivnc52431.2021.9600771 ◽

2021 ◽

Author(s):

Mohammad M. Allaham ◽

Marwan S. Mousa ◽

Daniel Burda ◽

Mohammad H. AlSa'eed ◽

Sabreen Y. AlJrawen ◽

...

Keyword(s):

Electron Emission ◽

Field Electron Emission ◽

Field Electron ◽

Current Voltage

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Regression Models for the Field Electron Emission Signal

Journal of Surface Investigation X-ray Synchrotron and Neutron Techniques ◽

10.1134/s1027451020060294 ◽

2020 ◽

Vol 14 (6) ◽

pp. 1394-1402

Author(s):

N. V. Egorov ◽

M. I. Varayun’ ◽

V. M. Bure ◽

A. Yu. Antonov

Keyword(s):

Electron Emission ◽

Regression Models ◽

Field Electron Emission ◽

Emission Signal ◽

Field Electron

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