Broadband amplification of low-terahertz signals using axis-encircling electrons in a helically corrugated interaction region

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Abstract

Experimental results are presented of a broadband, high power, gyrotron traveling wave amplifier (gyro-TWA) operating in the (75–110)-GHz frequency band and based on a helically corrugated interaction region. The second harmonic cyclotron mode of a 55-keV, 1.5-A, axis-encircling electron beam is used to resonantly interact with a traveling TE21-like eigenwave achieving broadband amplification. The gyro-TWA demonstrates a 3-dB gain bandwidth of at least 5.5 GHz in the experimental measurement with 9 GHz predicted for a wideband drive source with a measured unsaturated output power of 3.4 kW and gain of 36–38 dB. The approach may allow a gyro-TWA to operate at 1 THz.
LanguageEnglish
Article number184801
Number of pages5
JournalPhysical Review Letters
Volume119
Issue number18
DOIs
Publication statusPublished - 31 Oct 2017

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traveling wave amplifiers
broadband
electrons
interactions
power amplifiers
cyclotrons
electron beams
bandwidth
harmonics
output

Keywords

  • gyrotron traveling wave amplifier
  • axis-encircling electron beam
  • broadband
  • frequency
  • low-terahertz range

Cite this

@article{b46d0a37c6a744cca306da1eeb103ffa,
title = "Broadband amplification of low-terahertz signals using axis-encircling electrons in a helically corrugated interaction region",
abstract = "Experimental results are presented of a broadband, high power, gyrotron traveling wave amplifier (gyro-TWA) operating in the (75–110)-GHz frequency band and based on a helically corrugated interaction region. The second harmonic cyclotron mode of a 55-keV, 1.5-A, axis-encircling electron beam is used to resonantly interact with a traveling TE21-like eigenwave achieving broadband amplification. The gyro-TWA demonstrates a 3-dB gain bandwidth of at least 5.5 GHz in the experimental measurement with 9 GHz predicted for a wideband drive source with a measured unsaturated output power of 3.4 kW and gain of 36–38 dB. The approach may allow a gyro-TWA to operate at 1 THz.",
keywords = "gyrotron traveling wave amplifier, axis-encircling electron beam, broadband, frequency, low-terahertz range",
author = "W. He and Donaldson, {C. R.} and L. Zhang and K. Ronald and Phelps, {A. D. R.} and Cross, {A. W.}",
year = "2017",
month = "10",
day = "31",
doi = "10.1103/PhysRevLett.119.184801",
language = "English",
volume = "119",
journal = "Physical Review Letters",
issn = "0031-9007",
number = "18",

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TY - JOUR

T1 - Broadband amplification of low-terahertz signals using axis-encircling electrons in a helically corrugated interaction region

AU - He, W.

AU - Donaldson, C. R.

AU - Zhang, L.

AU - Ronald, K.

AU - Phelps, A. D. R.

AU - Cross, A. W.

PY - 2017/10/31

Y1 - 2017/10/31

N2 - Experimental results are presented of a broadband, high power, gyrotron traveling wave amplifier (gyro-TWA) operating in the (75–110)-GHz frequency band and based on a helically corrugated interaction region. The second harmonic cyclotron mode of a 55-keV, 1.5-A, axis-encircling electron beam is used to resonantly interact with a traveling TE21-like eigenwave achieving broadband amplification. The gyro-TWA demonstrates a 3-dB gain bandwidth of at least 5.5 GHz in the experimental measurement with 9 GHz predicted for a wideband drive source with a measured unsaturated output power of 3.4 kW and gain of 36–38 dB. The approach may allow a gyro-TWA to operate at 1 THz.

AB - Experimental results are presented of a broadband, high power, gyrotron traveling wave amplifier (gyro-TWA) operating in the (75–110)-GHz frequency band and based on a helically corrugated interaction region. The second harmonic cyclotron mode of a 55-keV, 1.5-A, axis-encircling electron beam is used to resonantly interact with a traveling TE21-like eigenwave achieving broadband amplification. The gyro-TWA demonstrates a 3-dB gain bandwidth of at least 5.5 GHz in the experimental measurement with 9 GHz predicted for a wideband drive source with a measured unsaturated output power of 3.4 kW and gain of 36–38 dB. The approach may allow a gyro-TWA to operate at 1 THz.

KW - gyrotron traveling wave amplifier

KW - axis-encircling electron beam

KW - broadband

KW - frequency

KW - low-terahertz range

UR - https://journals.aps.org/prl/

U2 - 10.1103/PhysRevLett.119.184801

DO - 10.1103/PhysRevLett.119.184801

M3 - Letter

VL - 119

JO - Physical Review Letters

T2 - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 18

M1 - 184801

ER -