Helically corrugated waveguide gyrotron traveling wave amplifier using a thermionic cathode electron gun

2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)

Garner

et al. 2017

This version is available at https://strathprints.strath.ac.uk/63168/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output.

Section: Introductionmentioning

confidence: 99%

Input coupling systems for mm-wave amplifiers

2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)

Garner

et al. 2017

“…Due to these attractive properties there are a number of applications for such devices including high resolution RADAR, plasma diagnostics, communications and medical imaging, based on electron spin resonance in conjunction with magnetic resonance and accurate material analysis based on terahertz spectroscopy. Recently gyrodevices in the form of both a gyro-TWA [1] and a gyro-BWO [2,3] have been developed at the University of Strathclyde. In this paper the latest experimental results of a W-band gyro-TWA are presented.…”

Section: Introductionmentioning

confidence: 99%

Further experiments of a W-band gyro-TWA based on a helically corrugated interaction region

2015 40th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

et al. 2015

Self Cite

This version is available at https://strathprints.strath.ac.uk/57305/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output.Abstract-Latest results of a W-band gyro-TWA with a helically corrugated waveguide and a cusp electron gun for operation at a high pulse repetition rate are presented. Performance upgrades of input coupler, output window, corrugated horn, pulsed power system and beam collector with water-cooling capability were realized. With an input seed signal from an 1.5 W, 90-96 GHz solid state source the amplification gain and minimum bandwidth were measured from the experiment.

“…Gyro-devices [1][2][3] are well suited to application in plasma physics, remote sensing and imaging and for electron spin resonance spectroscopy, due to the fast-wave cyclotron resonance maser instability, which is capable of producing high power coherent microwave radiation at frequencies(mm and sub-mm), that prove challenging for other sources. A Wband gyrotron traveling wave amplifier (gyro-TWA) and gyrotron backward wave oscillator (gyro-BWO) [4] based on a cusp electron beam source [5][6][7] and a helically corrugated interaction region (HCIR) [8] have been developed to provide a continuously tuneable source with a continuous wave (CW) power output of ~5 kW and ~10 kW respectively.…”

Section: Introductionmentioning

confidence: 99%

W-Band Quasi-Optical Mode Converters for Gyro-Devices

McElhinney

2nd IET Annual Active and Passive RF Devices Seminar

et al. 2014

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Abstract:A W-band corrugated horn has been designed, manufactured, and experimentally measured at the University of Strathclyde, for integration into a gyro-device as a quasi-optical launcher. This horn converts a cylindrical TE11 mode into a free space TEM00 mode in a frequency band of 84-104 GHz with a reflection better than -30 dB and a Gaussian coupling efficiency of ~98% and directivity of 26.6 dB at 95 GHz. The small beam waist makes such a horn ideal for use with a depressed collector system. The measured results are in excellent agreement with the numerical simulations. Introduction:Gyro-devices [1][2][3] are well suited to application in plasma physics, remote sensing and imaging and for electron spin resonance spectroscopy, due to the fast-wave cyclotron resonance maser instability, which is capable of producing high power coherent microwave radiation at frequencies(mm and sub-mm), that prove challenging for other sources. A Wband gyrotron traveling wave amplifier (gyro-TWA) and gyrotron backward wave oscillator (gyro-BWO) [4] based on a cusp electron beam source [5][6][7] and a helically corrugated interaction region (HCIR) [8] have been developed to provide a continuously tuneable source with a continuous wave (CW) power output of ~5 kW and ~10 kW respectively. The gyro-TWA was simulated to have a 3 dB frequency bandwidth of 90-100 GHz while the gyro-BWO demonstrated a tuning range of 88-102.5 GHz and has achieved an output power of 12 kW [9]