Design and numerical optimization of a cusp-gun-based electron beam for millimeter-wave gyro-devices

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Abstract

A novel thermionic cusp electron gun operating in the temperature-limited regime that produces a large-orbit electron beam through a nonadiabatic magnetic-field reversal was designed, analyzed, and optimized to give an electron-beam ideal for driving gyro-devices, particularly in the millimeter-to-submillimeter-wavelength range due to its small cross-sectional size. The annular-shaped axis-encircling electron beam had a beam current of 1.5 A at an acceleration potential of 40 kV, a tunable velocity ratio alpha (= vperp/vz) between one and three, an optimized axial velocity spread A.vx/vz of ~8%, and a relative alpha spread Deltakappa/alpha of ~10% at an alpha value of 1.65.
LanguageEnglish
Pages2153-2157
Number of pages4
JournalIEEE Transactions on Plasma Science
Volume37
Issue number11
DOIs
Publication statusPublished - 6 Nov 2009

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design optimization
cusps
millimeter waves
electron beams
optimization
thermionics
electron guns
beam currents
orbits
magnetic fields
wavelengths
temperature

Keywords

  • axis-encircling electron beam
  • cusp electron gun
  • gyro-BWO
  • gyro-TWT
  • high-harmonic gyrotron
  • THz electron-beam source
  • W-band

Cite this

@article{9eb34c478b424a2b9a45a4f1fdb83866,
title = "Design and numerical optimization of a cusp-gun-based electron beam for millimeter-wave gyro-devices",
abstract = "A novel thermionic cusp electron gun operating in the temperature-limited regime that produces a large-orbit electron beam through a nonadiabatic magnetic-field reversal was designed, analyzed, and optimized to give an electron-beam ideal for driving gyro-devices, particularly in the millimeter-to-submillimeter-wavelength range due to its small cross-sectional size. The annular-shaped axis-encircling electron beam had a beam current of 1.5 A at an acceleration potential of 40 kV, a tunable velocity ratio alpha (= vperp/vz) between one and three, an optimized axial velocity spread A.vx/vz of ~8{\%}, and a relative alpha spread Deltakappa/alpha of ~10{\%} at an alpha value of 1.65.",
keywords = "axis-encircling electron beam, cusp electron gun, gyro-BWO, gyro-TWT, high-harmonic gyrotron, THz electron-beam source, W-band",
author = "Craig Donaldson and Wenlong He and A.W. Cross and A.D.R. Phelps and Fengping Li and K. Ronald and C.W. Robertson and C.G. Whyte and A.R. Young",
note = "Strathprints' policy is to record up to 8 authors per publication, plus any additional authors based at the University of Strathclyde. More authors may be listed on the official publication than appear in the Strathprints' record.",
year = "2009",
month = "11",
day = "6",
doi = "10.1109/TPS.2009.2031470",
language = "English",
volume = "37",
pages = "2153--2157",
journal = "IEEE Transactions on Plasma Science",
issn = "0093-3813",
number = "11",

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TY - JOUR

T1 - Design and numerical optimization of a cusp-gun-based electron beam for millimeter-wave gyro-devices

AU - Donaldson, Craig

AU - He, Wenlong

AU - Cross, A.W.

AU - Phelps, A.D.R.

AU - Li, Fengping

AU - Ronald, K.

AU - Robertson, C.W.

AU - Whyte, C.G.

AU - Young, A.R.

N1 - Strathprints' policy is to record up to 8 authors per publication, plus any additional authors based at the University of Strathclyde. More authors may be listed on the official publication than appear in the Strathprints' record.

PY - 2009/11/6

Y1 - 2009/11/6

N2 - A novel thermionic cusp electron gun operating in the temperature-limited regime that produces a large-orbit electron beam through a nonadiabatic magnetic-field reversal was designed, analyzed, and optimized to give an electron-beam ideal for driving gyro-devices, particularly in the millimeter-to-submillimeter-wavelength range due to its small cross-sectional size. The annular-shaped axis-encircling electron beam had a beam current of 1.5 A at an acceleration potential of 40 kV, a tunable velocity ratio alpha (= vperp/vz) between one and three, an optimized axial velocity spread A.vx/vz of ~8%, and a relative alpha spread Deltakappa/alpha of ~10% at an alpha value of 1.65.

AB - A novel thermionic cusp electron gun operating in the temperature-limited regime that produces a large-orbit electron beam through a nonadiabatic magnetic-field reversal was designed, analyzed, and optimized to give an electron-beam ideal for driving gyro-devices, particularly in the millimeter-to-submillimeter-wavelength range due to its small cross-sectional size. The annular-shaped axis-encircling electron beam had a beam current of 1.5 A at an acceleration potential of 40 kV, a tunable velocity ratio alpha (= vperp/vz) between one and three, an optimized axial velocity spread A.vx/vz of ~8%, and a relative alpha spread Deltakappa/alpha of ~10% at an alpha value of 1.65.

KW - axis-encircling electron beam

KW - cusp electron gun

KW - gyro-BWO

KW - gyro-TWT

KW - high-harmonic gyrotron

KW - THz electron-beam source

KW - W-band

U2 - 10.1109/TPS.2009.2031470

DO - 10.1109/TPS.2009.2031470

M3 - Article

VL - 37

SP - 2153

EP - 2157

JO - IEEE Transactions on Plasma Science

T2 - IEEE Transactions on Plasma Science

JF - IEEE Transactions on Plasma Science

SN - 0093-3813

IS - 11

ER -