The Simulation of a High-Power Low-Velocity-Spread Space-Charge-Limited (SCL) Cusp Gun

Wang, Jianxun; Luo, Yong; Luhmann, Neville C.

doi:10.1109/tps.2010.2085090

Cited by 7 publications

(9 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This equation shows the possibility to reduce the velocity spread by adjusting the spread of the guiding center and the initial GAM. For the non-ideal cusp model with accelerated electrons, the following equation can be derived from the Lagrange equation of the radial component [17], [19] 1 0…”

Section: Development Of a Magnetic Cusp Gun For A 1-thz Harmonic Gyrotronmentioning

confidence: 99%

Development of a Magnetic Cusp Gun for a 1-THz Harmonic Gyrotron

Zhang

et al. 2021

IEEE Trans. Electron Devices

View full text Add to dashboard Cite

Section: Development Of a Magnetic Cusp Gun For A 1-thz Harmonic Gyrotronmentioning

confidence: 99%

Development of a Magnetic Cusp Gun for a 1-THz Harmonic Gyrotron

Zhang

et al. 2021

IEEE Trans. Electron Devices

View full text Add to dashboard Cite

“…The relation between velocity spread and thickness of the emitter has been derived as Eq. 5 in Wang's paper 8 . Using the symbols defined in the paper, it can be rewritten as…”

Section: Theoretical Analysis and Numerical Simulationsmentioning

confidence: 99%

“…From the conservation of the canonical angular momentum, the electrons will encircle around the longitudinal axis at the exit of the field reversal 6 . The electron guns using an adiabatic field reversal were firstly employed in [7][8][9] . Their drawbacks include: small cathode radius, difficult to achieve short field transition length and particular field configurations.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the optimal magnetic field of a cusp electron gun for a W-band gyro-TWA

Zhang

Donaldson

et al. 2018

Physics of Plasmas

View full text Add to dashboard Cite

High efficiency and broadband operation of a gyrotron traveling wave amplifier (gyro-TWA) requires a highquality electron beam with low-velocity spreads. The beam velocity spreads are mainly due to the differences of the electric and magnetic fields that the electrons withstand the electron gun. This paper investigates the possibility to decouple the design of electron gun geometry and the magnet system while still achieving optimal results, through a case study of designing a cusp electron gun for a W-band gyro-TWA. A global multiple-objective optimization routing was used to optimize the electron gun geometry for different predefined magnetic field profiles individually. Their results were compared and the properties of the required magnetic field profile are summarized.

show abstract

“…6. After interacting with EM wave, electron beam will inevitably deform and diffuse for the nonuniform distribution of EM field, the space-charge force, and the spread of initial velocity distribution [11], [12]. So we have designed a SWS connector at the end of the SWS.…”

Section: Engineering Designmentioning

confidence: 99%

Extremely Broad Bandwidth Input/Output Coupling Structure Design for a <inline-formula> <tex-math notation="TeX">\(Q\) </tex-math></inline-formula>-Band Sheet-Beam Traveling-Wave Tube

Zheng

Wang

Luo

2014

IEEE Trans. Plasma Sci.

Self Cite

View full text Add to dashboard Cite

In this paper, a new type input/output (i/o) structure, adopting the multiaperture coupler, for broadband sheet-beam traveling-wave tube was designed and analyzed. This novel coupling structure not only can get a larger electron passway, which will greatly benefit the transmission of the electron beam, without deteriorating electromagnetic transmission characteristics, but also work over an extremely broad bandwidth. The transmission characteristics of this coupling i/o structure are investigated by Ansoft's high-frequency structure simulator (HFSS). Operating at TE 10 mode, the maximum insertion loss and isolation of the i/o structure over 36-52 GHz, which equals to 36.4% bandwidth, are −25 and −20 dB, the transmission coefficient is above −0.3 dB. The results of HFSS were verified by Computer Simulation Technology Microwave Studio.Index Terms-Extremely broadband, input/output (i/o) structure, multiaperture coupler, sheet-beam traveling wave tube (SB-TWT). in 2010, where he is currently pursuing the Ph.D. degree.His current research interests include high-power millimeter-wave devices, including SB-TWT and SB-klystron.Jianxun Wang received the M.S. degree in physical electronics from the

show abstract

The Simulation of a High-Power Low-Velocity-Spread Space-Charge-Limited (SCL) Cusp Gun

Cited by 7 publications

References 31 publications

Development of a Magnetic Cusp Gun for a 1-THz Harmonic Gyrotron

Development of a Magnetic Cusp Gun for a 1-THz Harmonic Gyrotron

Investigation on the optimal magnetic field of a cusp electron gun for a W-band gyro-TWA

Extremely Broad Bandwidth Input/Output Coupling Structure Design for a <inline-formula> <tex-math notation="TeX">\(Q\) </tex-math></inline-formula>-Band Sheet-Beam Traveling-Wave Tube

Contact Info

Product

Resources

About