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

Tools

He, W. and Donaldson, C. R. and Zhang, L. and Ronald, K. and Phelps, A. D. R. and Cross, A. W. (2017) Broadband amplification of low-terahertz signals using axis-encircling electrons in a helically corrugated interaction region. Physical Review Letters, 119 (18). 184801. ISSN 1079-7114 (https://doi.org/10.1103/PhysRevLett.119.184801)

[thumbnail of He-etal-PRL-2017-Broadband-amplification-of-low-terahertz-signals-using-axis-encircling-electrons]
Preview
 Text. Filename: He_etal_PRL_2017_Broadband_amplification_of_low_terahertz_signals_using_axis_encircling_electrons.pdf
Final Published Version
License: Creative Commons Attribution 4.0 logo
Download (1MB)| Preview

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.

ORCID iDs

He, W. ORCID logoORCID: https://orcid.org/0000-0001-7018-0527, Donaldson, C. R. ORCID logoORCID: https://orcid.org/0000-0001-6627-2461, Zhang, L. ORCID logoORCID: https://orcid.org/0000-0002-6317-0395, Ronald, K. ORCID logoORCID: https://orcid.org/0000-0002-8585-0746, Phelps, A. D. R. ORCID logoORCID: https://orcid.org/0000-0002-1100-1012 and Cross, A. W. ORCID logoORCID: https://orcid.org/0000-0001-7672-1283;
  • Item type:Article
    ID code:62227
    Dates:
    Date
    Event
    31 October 2017
    Published
    22 September 2017
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:02 Nov 2017 11:41
    Last modified:22 Feb 2025 14:04
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/62227
CORE (COnnecting REpositories)