A versatile test rig for the evaluation of thermionic electron guns

H. Ahmed; C. J.D. Catto; J. R.A. Cleaver; P. L. Kanitkar; D. J. Smith

doi:10.1088/0022-3735/15/12/020

A versatile test rig for the evaluation of thermionic electron guns

H. Ahmed, C. J.D. Catto, J. R.A. Cleaver, P. L. Kanitkar, D. J. Smith

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Measurements of the brightness and the electron energy distribution for high-performance electron guns for electron-optical instruments must take account of the small effective size of the electron source and the directional dependence of the emission from it. A versatile electron gun test rig has been developed to enable measurements to be made under realistic operating conditions. Energy distribution can be determined with a hemispherical cup retarding-field analyser, and brightness can be measured at up to 100 kV by both two-aperture and crossover-projection methods. Some measured characteristics of lanthanum hexaboride cathodes are given, with measurements of conventional tungsten cathodes for comparison.

Original language	English (US)
Article number	020
Pages (from-to)	1351-1355
Number of pages	5
Journal	Journal of Physics E: Scientific Instruments
Volume	15
Issue number	12
DOIs	https://doi.org/10.1088/0022-3735/15/12/020
State	Published - Dec 1 1982
Externally published	Yes

ASJC Scopus subject areas

Instrumentation
General Materials Science
General Engineering
General Physics and Astronomy

Access to Document

10.1088/0022-3735/15/12/020

Cite this

@article{89ecc2cada1c4abda51b223193f30c26,

title = "A versatile test rig for the evaluation of thermionic electron guns",

abstract = "Measurements of the brightness and the electron energy distribution for high-performance electron guns for electron-optical instruments must take account of the small effective size of the electron source and the directional dependence of the emission from it. A versatile electron gun test rig has been developed to enable measurements to be made under realistic operating conditions. Energy distribution can be determined with a hemispherical cup retarding-field analyser, and brightness can be measured at up to 100 kV by both two-aperture and crossover-projection methods. Some measured characteristics of lanthanum hexaboride cathodes are given, with measurements of conventional tungsten cathodes for comparison.",

author = "H. Ahmed and Catto, {C. J.D.} and Cleaver, {J. R.A.} and Kanitkar, {P. L.} and Smith, {D. J.}",

year = "1982",

month = dec,

day = "1",

doi = "10.1088/0022-3735/15/12/020",

language = "English (US)",

volume = "15",

pages = "1351--1355",

journal = "Journal of Physics E: Scientific Instruments",

issn = "0022-3735",

publisher = "IOP Publishing Ltd.",

number = "12",

}

TY - JOUR

T1 - A versatile test rig for the evaluation of thermionic electron guns

AU - Ahmed, H.

AU - Catto, C. J.D.

AU - Cleaver, J. R.A.

AU - Kanitkar, P. L.

AU - Smith, D. J.

PY - 1982/12/1

Y1 - 1982/12/1

N2 - Measurements of the brightness and the electron energy distribution for high-performance electron guns for electron-optical instruments must take account of the small effective size of the electron source and the directional dependence of the emission from it. A versatile electron gun test rig has been developed to enable measurements to be made under realistic operating conditions. Energy distribution can be determined with a hemispherical cup retarding-field analyser, and brightness can be measured at up to 100 kV by both two-aperture and crossover-projection methods. Some measured characteristics of lanthanum hexaboride cathodes are given, with measurements of conventional tungsten cathodes for comparison.

AB - Measurements of the brightness and the electron energy distribution for high-performance electron guns for electron-optical instruments must take account of the small effective size of the electron source and the directional dependence of the emission from it. A versatile electron gun test rig has been developed to enable measurements to be made under realistic operating conditions. Energy distribution can be determined with a hemispherical cup retarding-field analyser, and brightness can be measured at up to 100 kV by both two-aperture and crossover-projection methods. Some measured characteristics of lanthanum hexaboride cathodes are given, with measurements of conventional tungsten cathodes for comparison.

UR - http://www.scopus.com/inward/record.url?scp=0020267196&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0020267196&partnerID=8YFLogxK

U2 - 10.1088/0022-3735/15/12/020

DO - 10.1088/0022-3735/15/12/020

M3 - Article

AN - SCOPUS:0020267196

SN - 0022-3735

VL - 15

SP - 1351

EP - 1355

JO - Journal of Physics E: Scientific Instruments

JF - Journal of Physics E: Scientific Instruments

IS - 12

M1 - 020

ER -

A versatile test rig for the evaluation of thermionic electron guns

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this