Demonstration of efficient beam-wave interaction for a MW-level 48 GHz gyroklystron amplifier

L. J. R. Nix; L. Zhang; W. He; C. R. Donaldson; K. Ronald; A. W. Cross; C. G. Whyte

doi:10.1063/1.5144590

Demonstration of efficient beam-wave interaction for a MW-level 48 GHz gyroklystron amplifier

L. J. R. Nix, L. Zhang, W. He, C. R. Donaldson, K. Ronald, A. W. Cross, C. G. Whyte

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Abstract

The development of high-frequency RF linear accelerators (linacs) requires the consideration of several technological challenges, such as electron bunch linearization. Presented in this paper is the design of the interaction circuit for a 48 GHz MW-level three-cavity gyroklystron amplifier, appropriate for application as a millimeter wave power source in a fourth harmonic linearizing system for an X-band linac. The output cavity is operated at the cylindrical TE0,2,1 mode, while the input and buncher cavities are operated at the TE0,1,1 mode. The interaction circuit has been designed using a combination of analytical calculations and particle-in-cell simulations. The optimized gyroklystron is shown, through simulation, to deliver an output power of up to 2.3 MW with a gain of 36 dB and an efficiency of 44% at 48 GHz, when driven by a 140 kV, 37 A electron beam.

The support of the STFC UK (Cockcroft Institute Core GrantR160525-1) is gratefully acknowledged.
This work is supported by European Union (EU) Horizon 2020 Project “CompactLight” 2017-2021.
“CompactLight” grant code: 777431-XLS.
Published data March 2020, under Self-archiving / 'green' OA.

Original language	English
Article number	053101
Number of pages	7
Journal	Physics of Plasmas
Volume	27
Issue number	5
Early online date	4 May 2020
DOIs	https://doi.org/10.1063/1.5144590
Publication status	E-pub ahead of print - 4 May 2020

Keywords

electron beams
particle-in-cell method
gyroklystron amplifier

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10.1063/1.5144590

Nix-etal-PP-2020-Demonstration-of-efficient-beam-wave-interactionAccepted author manuscript, 633 KB

Sheet electron beam vacuum electronic devices for the generation of high power THz radiation
Cross, A., He, W., Phelps, A. & Zhang, L.
EPSRC (Engineering and Physical Sciences Research Council)
5/03/19 → 4/03/21
Project: Research
Compact Light (XLS) H2020 INFRADEV-2016-2017
Cross, A., Ronald, K. & Zhang, L.
European Commission - Horizon 2020
1/01/18 → 31/12/20
Project: Research
Cockcroft Institute / R160525-1
Riis, E., Cross, A., Eliasson, B., Gray, R., Hidding, B., Jaroszynski, D., McKenna, P., McNeil, B., Ronald, K. & Sheng, Z.
1/04/17 → 31/03/22
Project: Research - Internally Allocated

Data for: European Commission – Horizon 2020 funded project Compact Light (XLS) H2020 INFRADEV-2016-2017
Zhang, L. (Creator), Cross, A. (Owner), Nix, L. (Creator) & Ronald, K. (Owner), University of Strathclyde, 13 Aug 2020
DOI: 10.15129/42295778-9279-431a-8f8b-2c7e8f4b25da
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title = "Demonstration of efficient beam-wave interaction for a MW-level 48 GHz gyroklystron amplifier",

abstract = "The development of high-frequency RF linear accelerators (linacs) requires the consideration of several technological challenges, such as electron bunch linearization. Presented in this paper is the design of the interaction circuit for a 48 GHz MW-level three-cavity gyroklystron amplifier, appropriate for application as a millimeter wave power source in a fourth harmonic linearizing system for an X-band linac. The output cavity is operated at the cylindrical TE0,2,1 mode, while the input and buncher cavities are operated at the TE0,1,1 mode. The interaction circuit has been designed using a combination of analytical calculations and particle-in-cell simulations. The optimized gyroklystron is shown, through simulation, to deliver an output power of up to 2.3 MW with a gain of 36 dB and an efficiency of 44% at 48 GHz, when driven by a 140 kV, 37 A electron beam.The support of the STFC UK (Cockcroft Institute Core GrantR160525-1) is gratefully acknowledged.This work is supported by European Union (EU) Horizon 2020 Project “CompactLight” 2017-2021.“CompactLight” grant code: 777431-XLS.Published data March 2020, under Self-archiving / 'green' OA.",

keywords = "electron beams, particle-in-cell method, gyroklystron amplifier",

author = "Nix, {L. J. R.} and L. Zhang and W. He and Donaldson, {C. R.} and K. Ronald and Cross, {A. W.} and Whyte, {C. G.}",

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AU - Nix, L. J. R.

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AU - He, W.

AU - Donaldson, C. R.

AU - Ronald, K.

AU - Cross, A. W.

AU - Whyte, C. G.

PY - 2020/5/4

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N2 - The development of high-frequency RF linear accelerators (linacs) requires the consideration of several technological challenges, such as electron bunch linearization. Presented in this paper is the design of the interaction circuit for a 48 GHz MW-level three-cavity gyroklystron amplifier, appropriate for application as a millimeter wave power source in a fourth harmonic linearizing system for an X-band linac. The output cavity is operated at the cylindrical TE0,2,1 mode, while the input and buncher cavities are operated at the TE0,1,1 mode. The interaction circuit has been designed using a combination of analytical calculations and particle-in-cell simulations. The optimized gyroklystron is shown, through simulation, to deliver an output power of up to 2.3 MW with a gain of 36 dB and an efficiency of 44% at 48 GHz, when driven by a 140 kV, 37 A electron beam.The support of the STFC UK (Cockcroft Institute Core GrantR160525-1) is gratefully acknowledged.This work is supported by European Union (EU) Horizon 2020 Project “CompactLight” 2017-2021.“CompactLight” grant code: 777431-XLS.Published data March 2020, under Self-archiving / 'green' OA.

AB - The development of high-frequency RF linear accelerators (linacs) requires the consideration of several technological challenges, such as electron bunch linearization. Presented in this paper is the design of the interaction circuit for a 48 GHz MW-level three-cavity gyroklystron amplifier, appropriate for application as a millimeter wave power source in a fourth harmonic linearizing system for an X-band linac. The output cavity is operated at the cylindrical TE0,2,1 mode, while the input and buncher cavities are operated at the TE0,1,1 mode. The interaction circuit has been designed using a combination of analytical calculations and particle-in-cell simulations. The optimized gyroklystron is shown, through simulation, to deliver an output power of up to 2.3 MW with a gain of 36 dB and an efficiency of 44% at 48 GHz, when driven by a 140 kV, 37 A electron beam.The support of the STFC UK (Cockcroft Institute Core GrantR160525-1) is gratefully acknowledged.This work is supported by European Union (EU) Horizon 2020 Project “CompactLight” 2017-2021.“CompactLight” grant code: 777431-XLS.Published data March 2020, under Self-archiving / 'green' OA.

KW - electron beams

KW - particle-in-cell method

KW - gyroklystron amplifier

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DO - 10.1063/1.5144590

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SN - 1070-664X

VL - 27

JO - Physics of Plasmas

JF - Physics of Plasmas

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M1 - 053101

ER -

Demonstration of efficient beam-wave interaction for a MW-level 48 GHz gyroklystron amplifier

Abstract

Keywords

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Projects

Sheet electron beam vacuum electronic devices for the generation of high power THz radiation

Compact Light (XLS) H2020 INFRADEV-2016-2017

Cockcroft Institute / R160525-1

Datasets

Data for: European Commission – Horizon 2020 funded project Compact Light (XLS) H2020 INFRADEV-2016-2017

Cite this