The design of a 390 GHz gyrotron based on a cusp electron gun

F. Li; W. He; A. D. R. Phelps; C. R. Donaldson; L. Zhang; A. W. Cross; K. Ronald

doi:10.1109/ICIMW.2010.5612375

The design of a 390 GHz gyrotron based on a cusp electron gun

F. Li, W. He, A. D. R. Phelps, C. R. Donaldson, L. Zhang, A. W. Cross, K. Ronald

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

Abstract

A 390 GHz harmonic gyrotron based on a cusp electron gun was designed to operate on a TE 71 mode and the 7 th cyclotron harmonic of a large orbit electron beam. This beam is produced by a cusp electron gun with a voltage of 40 keV, a current of 1.5 A and an adjustable velocity ratio from 1 to 3. Smooth cylindrical waveguide was studied and built as the interaction cavity. The relationship between the cavity dimensions and cavity Q was optimized for output at the design mode. A simple linear output taper with moderate mode conversion was used in the gyrotron output. Both theoretical analysis and numerical simulation results (using the 3D PIC code MAGIC) of this gyrotron will be presented. When the beam thickness and beam spread were introduced into the simulation, competitive modes were observed in the simulation resulting in a drop in the output power. A high frequency (325-500 GHz) VNA was used to measure the millimeter wave properties of the gyrotron cavity and the results are presented in this paper.

Original language	English
Title of host publication	35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010)
Publisher	IEEE
Number of pages	2
ISBN (Print)	9781424466559
DOIs	https://doi.org/10.1109/ICIMW.2010.5612375
Publication status	Published - 28 Oct 2010
Event	35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010) - Rome, Italy Duration: 5 Sept 2010 → 10 Sept 2010

Conference

Conference	35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010)
Country/Territory	Italy
City	Rome
Period	5/09/10 → 10/09/10

Keywords

cavity resonators
electron beams
helium
power generation
harmonic analysis
gyrotrons
terahertz wave detectors

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10.1109/ICIMW.2010.5612375

Cite this

@inproceedings{0f2be363c3664558bc0053eed6e4db83,

title = "The design of a 390 GHz gyrotron based on a cusp electron gun",

abstract = "A 390 GHz harmonic gyrotron based on a cusp electron gun was designed to operate on a TE 71 mode and the 7 th cyclotron harmonic of a large orbit electron beam. This beam is produced by a cusp electron gun with a voltage of 40 keV, a current of 1.5 A and an adjustable velocity ratio from 1 to 3. Smooth cylindrical waveguide was studied and built as the interaction cavity. The relationship between the cavity dimensions and cavity Q was optimized for output at the design mode. A simple linear output taper with moderate mode conversion was used in the gyrotron output. Both theoretical analysis and numerical simulation results (using the 3D PIC code MAGIC) of this gyrotron will be presented. When the beam thickness and beam spread were introduced into the simulation, competitive modes were observed in the simulation resulting in a drop in the output power. A high frequency (325-500 GHz) VNA was used to measure the millimeter wave properties of the gyrotron cavity and the results are presented in this paper.",

keywords = "cavity resonators, electron beams, helium, power generation, harmonic analysis, gyrotrons, terahertz wave detectors",

author = "F. Li and W. He and Phelps, {A. D. R.} and Donaldson, {C. R.} and L. Zhang and Cross, {A. W.} and K. Ronald",

year = "2010",

month = oct,

day = "28",

doi = "10.1109/ICIMW.2010.5612375",

language = "English",

isbn = "9781424466559",

booktitle = "35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010)",

publisher = "IEEE",

note = "35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010) ; Conference date: 05-09-2010 Through 10-09-2010",

}

Li, F, He, W, Phelps, ADR , Donaldson, CR , Zhang, L, Cross, AW & Ronald, K 2010, The design of a 390 GHz gyrotron based on a cusp electron gun. in 35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010). IEEE, 35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010), Rome, Italy, 5/09/10. https://doi.org/10.1109/ICIMW.2010.5612375

TY - GEN

T1 - The design of a 390 GHz gyrotron based on a cusp electron gun

AU - Li, F.

AU - He, W.

AU - Phelps, A. D. R.

AU - Donaldson, C. R.

AU - Zhang, L.

AU - Cross, A. W.

AU - Ronald, K.

PY - 2010/10/28

Y1 - 2010/10/28

N2 - A 390 GHz harmonic gyrotron based on a cusp electron gun was designed to operate on a TE 71 mode and the 7 th cyclotron harmonic of a large orbit electron beam. This beam is produced by a cusp electron gun with a voltage of 40 keV, a current of 1.5 A and an adjustable velocity ratio from 1 to 3. Smooth cylindrical waveguide was studied and built as the interaction cavity. The relationship between the cavity dimensions and cavity Q was optimized for output at the design mode. A simple linear output taper with moderate mode conversion was used in the gyrotron output. Both theoretical analysis and numerical simulation results (using the 3D PIC code MAGIC) of this gyrotron will be presented. When the beam thickness and beam spread were introduced into the simulation, competitive modes were observed in the simulation resulting in a drop in the output power. A high frequency (325-500 GHz) VNA was used to measure the millimeter wave properties of the gyrotron cavity and the results are presented in this paper.

AB - A 390 GHz harmonic gyrotron based on a cusp electron gun was designed to operate on a TE 71 mode and the 7 th cyclotron harmonic of a large orbit electron beam. This beam is produced by a cusp electron gun with a voltage of 40 keV, a current of 1.5 A and an adjustable velocity ratio from 1 to 3. Smooth cylindrical waveguide was studied and built as the interaction cavity. The relationship between the cavity dimensions and cavity Q was optimized for output at the design mode. A simple linear output taper with moderate mode conversion was used in the gyrotron output. Both theoretical analysis and numerical simulation results (using the 3D PIC code MAGIC) of this gyrotron will be presented. When the beam thickness and beam spread were introduced into the simulation, competitive modes were observed in the simulation resulting in a drop in the output power. A high frequency (325-500 GHz) VNA was used to measure the millimeter wave properties of the gyrotron cavity and the results are presented in this paper.

KW - cavity resonators

KW - electron beams

KW - helium

KW - power generation

KW - harmonic analysis

KW - gyrotrons

KW - terahertz wave detectors

U2 - 10.1109/ICIMW.2010.5612375

DO - 10.1109/ICIMW.2010.5612375

M3 - Conference contribution book

SN - 9781424466559

BT - 35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010)

PB - IEEE

T2 - 35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010)

Y2 - 5 September 2010 through 10 September 2010

ER -

The design of a 390 GHz gyrotron based on a cusp electron gun

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