CNC machined helically corrugated interaction region for a THz gyrotron traveling wave amplifier

Craig R. Donaldson; Liang Zhang; Mat Beardsley; Michael Harris; Peter G. Hugard; Wenlong He

doi:10.1109/TTHZ.2017.2778944

CNC machined helically corrugated interaction region for a THz gyrotron traveling wave amplifier

Craig R. Donaldson, Liang Zhang, Mat Beardsley, Michael Harris, Peter G. Hugard, Wenlong He

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Abstract

This paper reports the development of a helically corrugated interaction region (HCIR) for a 100 W gyrotron traveling wave amplifier operating at a central frequency of 0.37 THz. This HCIR has a corrugation amplitude of 42 μm, with a nominal waveguide diameter of 0.760 mm. The HCIR was made by electroforming copper on a sacrificial aluminum mandrel: the latter was precision CNC milled using a 0.2 mm diameter ball nose cutter. The dispersion characteristics of the HCIR were measured and found to be in good agreement with the analytical calculation and numerical simulation. Measured insertion loss was between 2 and 4 dB.

Original language	English
Pages (from-to)	85-89
Number of pages	5
Journal	IEEE Transactions on Terahertz Science & Technology
Volume	8
Issue number	1
Early online date	15 Dec 2017
DOIs	https://doi.org/10.1109/TTHZ.2017.2778944
Publication status	Published - 31 Jan 2018

Keywords

gyro-amplifier
helically corrugated waveguide
dispersion

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10.1109/TTHZ.2017.2778944

Donaldson-etal-TTST2017-CNC-machined-helically-corrugated-interaction-region-for-a-THzAccepted author manuscript, 3.31 MB

Cite this

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title = "CNC machined helically corrugated interaction region for a THz gyrotron traveling wave amplifier",

abstract = "This paper reports the development of a helically corrugated interaction region (HCIR) for a 100 W gyrotron traveling wave amplifier operating at a central frequency of 0.37 THz. This HCIR has a corrugation amplitude of 42 μm, with a nominal waveguide diameter of 0.760 mm. The HCIR was made by electroforming copper on a sacrificial aluminum mandrel: the latter was precision CNC milled using a 0.2 mm diameter ball nose cutter. The dispersion characteristics of the HCIR were measured and found to be in good agreement with the analytical calculation and numerical simulation. Measured insertion loss was between 2 and 4 dB.",

keywords = "gyro-amplifier, helically corrugated waveguide, dispersion",

author = "Donaldson, {Craig R.} and Liang Zhang and Mat Beardsley and Michael Harris and Hugard, {Peter G.} and Wenlong He",

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year = "2018",

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day = "31",

doi = "10.1109/TTHZ.2017.2778944",

language = "English",

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AU - Donaldson, Craig R.

AU - Zhang, Liang

AU - Beardsley, Mat

AU - Harris, Michael

AU - Hugard, Peter G.

AU - He, Wenlong

N1 - © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

PY - 2018/1/31

Y1 - 2018/1/31

N2 - This paper reports the development of a helically corrugated interaction region (HCIR) for a 100 W gyrotron traveling wave amplifier operating at a central frequency of 0.37 THz. This HCIR has a corrugation amplitude of 42 μm, with a nominal waveguide diameter of 0.760 mm. The HCIR was made by electroforming copper on a sacrificial aluminum mandrel: the latter was precision CNC milled using a 0.2 mm diameter ball nose cutter. The dispersion characteristics of the HCIR were measured and found to be in good agreement with the analytical calculation and numerical simulation. Measured insertion loss was between 2 and 4 dB.

AB - This paper reports the development of a helically corrugated interaction region (HCIR) for a 100 W gyrotron traveling wave amplifier operating at a central frequency of 0.37 THz. This HCIR has a corrugation amplitude of 42 μm, with a nominal waveguide diameter of 0.760 mm. The HCIR was made by electroforming copper on a sacrificial aluminum mandrel: the latter was precision CNC milled using a 0.2 mm diameter ball nose cutter. The dispersion characteristics of the HCIR were measured and found to be in good agreement with the analytical calculation and numerical simulation. Measured insertion loss was between 2 and 4 dB.

KW - gyro-amplifier

KW - helically corrugated waveguide

KW - dispersion

UR - http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=5503871

U2 - 10.1109/TTHZ.2017.2778944

DO - 10.1109/TTHZ.2017.2778944

M3 - Article

VL - 8

SP - 85

EP - 89

JO - IEEE Transactions on Terahertz Science & Technology

JF - IEEE Transactions on Terahertz Science & Technology

SN - 2156-342X

IS - 1

ER -

CNC machined helically corrugated interaction region for a THz gyrotron traveling wave amplifier

Abstract

Keywords

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Development of a W-band gyro-amplifier for high power, wideband pulsed coherent applications

Novel Gyro-TWA amplifier for high power mm-wave radar remote sensing

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CNC machined helically corrugated interaction region for a THz gyrotron traveling wave amplifier

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Projects

Development of a W-band gyro-amplifier for high power, wideband pulsed coherent applications

Novel Gyro-TWA amplifier for high power mm-wave radar remote sensing

Cite this