Results from thermionic cathode gyro-twa experiments

A.D.R. Phelps, K. Ronald, W. He, A.R. Young, E.G. Rafferty, A.W. Cross, C.G. Whyte, Jamie Thomson, C.W. Robertson, IEEE

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Experimental operation of a gyro-travelling wave amplifier with a helically corrugated interaction region is presented. Two thermionic cathode electron guns in Pierce-type geometries were used to generate rectilinear electron beams of 1 μs pulse duration. One diode was operated at 185 keV energy with a current of 7.5 A and the other was operated with an applied potential of 115 kV producing a current of 18 A. Transverse velocity was imparted to the electron beam in a 'kicker'. The electron beam acquired a transverse velocity typically with a pitch factor of between 1 and 1.2. The resulting electron beam described a helical, axis-encircling trajectory. The coupling between the second harmonic cyclotron mode of the gyrating electron beam and the radiation field occurred in the region of near infinite phase velocity over a broad frequency band using a cylindrical waveguide with a helical corrugation on its internal surface. With a beam energy of 185 keV, the amplifier achieved a maximum output power of 220 kW, saturated gain of 24 dB, saturated bandwidth of 8.4 to 10.4 GHz (21% relative bandwidth) and an efficiency of 16%. With a beam energy of 115 keV, the amplifier achieved a maximum output power of 160 kW and an efficiency of 8%.
Original languageEnglish
Title of host publicationConference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electionics
Place of PublicationNew Jersey, USA
PublisherIEEE
Pages273-274
Number of pages1
ISBN (Print)0780384903
Publication statusPublished - 2004

Fingerprint

thermionic cathodes
electron beams
amplifiers
traveling wave amplifiers
bandwidth
output
electron guns
phase velocity
radiation distribution
cyclotrons
energy
pulse duration
diodes
trajectories
waveguides
harmonics
geometry
interactions

Keywords

  • experimental operation
  • gyro-travelling wave amplifier
  • thermionic cathode electron guns
  • electron beams
  • pulse duration
  • diode
  • energy

Cite this

Phelps, A. D. R., Ronald, K., He, W., Young, A. R., Rafferty, E. G., Cross, A. W., ... IEEE (2004). Results from thermionic cathode gyro-twa experiments. In Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electionics (pp. 273-274). New Jersey, USA: IEEE.
Phelps, A.D.R. ; Ronald, K. ; He, W. ; Young, A.R. ; Rafferty, E.G. ; Cross, A.W. ; Whyte, C.G. ; Thomson, Jamie ; Robertson, C.W. ; IEEE. / Results from thermionic cathode gyro-twa experiments. Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electionics. New Jersey, USA : IEEE, 2004. pp. 273-274
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title = "Results from thermionic cathode gyro-twa experiments",
abstract = "Experimental operation of a gyro-travelling wave amplifier with a helically corrugated interaction region is presented. Two thermionic cathode electron guns in Pierce-type geometries were used to generate rectilinear electron beams of 1 μs pulse duration. One diode was operated at 185 keV energy with a current of 7.5 A and the other was operated with an applied potential of 115 kV producing a current of 18 A. Transverse velocity was imparted to the electron beam in a 'kicker'. The electron beam acquired a transverse velocity typically with a pitch factor of between 1 and 1.2. The resulting electron beam described a helical, axis-encircling trajectory. The coupling between the second harmonic cyclotron mode of the gyrating electron beam and the radiation field occurred in the region of near infinite phase velocity over a broad frequency band using a cylindrical waveguide with a helical corrugation on its internal surface. With a beam energy of 185 keV, the amplifier achieved a maximum output power of 220 kW, saturated gain of 24 dB, saturated bandwidth of 8.4 to 10.4 GHz (21{\%} relative bandwidth) and an efficiency of 16{\%}. With a beam energy of 115 keV, the amplifier achieved a maximum output power of 160 kW and an efficiency of 8{\%}.",
keywords = "experimental operation, gyro-travelling wave amplifier, thermionic cathode electron guns, electron beams, pulse duration, diode, energy",
author = "A.D.R. Phelps and K. Ronald and W. He and A.R. Young and E.G. Rafferty and A.W. Cross and C.G. Whyte and Jamie Thomson and C.W. Robertson and IEEE",
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Phelps, ADR, Ronald, K, He, W, Young, AR, Rafferty, EG, Cross, AW, Whyte, CG, Thomson, J, Robertson, CW & IEEE 2004, Results from thermionic cathode gyro-twa experiments. in Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electionics. IEEE, New Jersey, USA, pp. 273-274.

Results from thermionic cathode gyro-twa experiments. / Phelps, A.D.R.; Ronald, K.; He, W.; Young, A.R.; Rafferty, E.G.; Cross, A.W.; Whyte, C.G.; Thomson, Jamie; Robertson, C.W.; IEEE.

Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electionics. New Jersey, USA : IEEE, 2004. p. 273-274.

Research output: Chapter in Book/Report/Conference proceedingChapter

TY - CHAP

T1 - Results from thermionic cathode gyro-twa experiments

AU - Phelps, A.D.R.

AU - Ronald, K.

AU - He, W.

AU - Young, A.R.

AU - Rafferty, E.G.

AU - Cross, A.W.

AU - Whyte, C.G.

AU - Thomson, Jamie

AU - Robertson, C.W.

AU - IEEE

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 - 2004

Y1 - 2004

N2 - Experimental operation of a gyro-travelling wave amplifier with a helically corrugated interaction region is presented. Two thermionic cathode electron guns in Pierce-type geometries were used to generate rectilinear electron beams of 1 μs pulse duration. One diode was operated at 185 keV energy with a current of 7.5 A and the other was operated with an applied potential of 115 kV producing a current of 18 A. Transverse velocity was imparted to the electron beam in a 'kicker'. The electron beam acquired a transverse velocity typically with a pitch factor of between 1 and 1.2. The resulting electron beam described a helical, axis-encircling trajectory. The coupling between the second harmonic cyclotron mode of the gyrating electron beam and the radiation field occurred in the region of near infinite phase velocity over a broad frequency band using a cylindrical waveguide with a helical corrugation on its internal surface. With a beam energy of 185 keV, the amplifier achieved a maximum output power of 220 kW, saturated gain of 24 dB, saturated bandwidth of 8.4 to 10.4 GHz (21% relative bandwidth) and an efficiency of 16%. With a beam energy of 115 keV, the amplifier achieved a maximum output power of 160 kW and an efficiency of 8%.

AB - Experimental operation of a gyro-travelling wave amplifier with a helically corrugated interaction region is presented. Two thermionic cathode electron guns in Pierce-type geometries were used to generate rectilinear electron beams of 1 μs pulse duration. One diode was operated at 185 keV energy with a current of 7.5 A and the other was operated with an applied potential of 115 kV producing a current of 18 A. Transverse velocity was imparted to the electron beam in a 'kicker'. The electron beam acquired a transverse velocity typically with a pitch factor of between 1 and 1.2. The resulting electron beam described a helical, axis-encircling trajectory. The coupling between the second harmonic cyclotron mode of the gyrating electron beam and the radiation field occurred in the region of near infinite phase velocity over a broad frequency band using a cylindrical waveguide with a helical corrugation on its internal surface. With a beam energy of 185 keV, the amplifier achieved a maximum output power of 220 kW, saturated gain of 24 dB, saturated bandwidth of 8.4 to 10.4 GHz (21% relative bandwidth) and an efficiency of 16%. With a beam energy of 115 keV, the amplifier achieved a maximum output power of 160 kW and an efficiency of 8%.

KW - experimental operation

KW - gyro-travelling wave amplifier

KW - thermionic cathode electron guns

KW - electron beams

KW - pulse duration

KW - diode

KW - energy

UR - http://www.ieee.org/conferences_events/conferences/conferencedetails/index.html?Conf_ID=9897

M3 - Chapter

SN - 0780384903

SP - 273

EP - 274

BT - Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electionics

PB - IEEE

CY - New Jersey, USA

ER -

Phelps ADR, Ronald K, He W, Young AR, Rafferty EG, Cross AW et al. Results from thermionic cathode gyro-twa experiments. In Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electionics. New Jersey, USA: IEEE. 2004. p. 273-274