Analysis of a 0.6-THz Second Harmonic Gyrotron With Gradually Tapered Cavity

Chaojun, Lei; Shen, Yu; Li, Hongfu; Niu, Xinjian; Zhao, Qixiang; Zhao, Yusheng; Wang, Jiansheng

doi:10.1109/tps.2013.2295654

Cited by 8 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The capability of arc suppressing inherent parasitic mode competition and conversion was also discussed in Refs. [14,15]. Although it is impossible greatly improve efficiency in engineering design, from the point of maximizing efficiency view, the resonator structure shown in Fig.1(b) should be applied.…”

Section: Simulation Resultsmentioning

confidence: 99%

Numerical Study of Interaction Efficiency for a 170GHz Megawatt‐Level Coaxial‐Gyrotron

et al. 2016

View full text Add to dashboard Cite

Section: Simulation Resultsmentioning

confidence: 99%

Numerical Study of Interaction Efficiency for a 170GHz Megawatt‐Level Coaxial‐Gyrotron

et al. 2016

View full text Add to dashboard Cite

“…The eigenfrequency ω n0 and the electric and magnetic field distributions E nc and B nc can be obtained by cold cavity calculation [13].…”

Section: A Time-dependent Nonlinear Multimode Theorymentioning

confidence: 99%

“…After selecting the operating mode, an appropriate interaction cavity is designed using the code based on the theory in [13].…”

Section: A Mode Selecting and Linear Properties Of Designed Gyrotronmentioning

confidence: 99%

Theoretical Study of Mode Competition in Terahertz Gyrotron With Second Harmonic Oscillation

Zhao¹,

Shen²,

Zhang³

2015

IEEE Trans. Plasma Sci.

Self Cite

View full text Add to dashboard Cite

The problem of mode competition can present a major hurdle for gyrotron to achieve stable and efficient operation, especially when the gyrotron operates at electron cyclotron harmonics. Therefore, an effective theoretical investigation of the mode competition is an essential first step to the implementation of gyrotron. In this paper, the nonlinear dynamics of the mode competition in the terahertz gyrotron operating at high-order mode are studied using a multifrequency time-dependent model. Based on the model, the simulations of mode competition in the designed gyrotron are presented by the corresponding code. The influence of the velocity spread on the mode competition is also studied. The simulations tracking five competing modes show that stable excitation of the second harmonic oscillation can be realized with a proper choice of the operation parameters. The results show that a single-mode second harmonic radiation with a power of over 120 kW at a frequency of 0.4 THz could be achieved.

show abstract

“…Compared with the solid-state sources, vacuum electron radiation sources (VERS) offer advantageously high output powers (up to 1 GW) and high operating frequencies (up to 1 THz), making them well-suited to the demanding requirements of industry and commerce [3]. Gyrotron structures, fast-wave devices with some of the highest recorded output powers, have received extensive attention in space communication, thermonuclear fusion, and medical diagnosis [4][5][6][7][8][9][10][11]. In such devices, affordable and movable scale magnets can generate magnetic fields of 10-15 T, which corresponds to electron-cyclotron frequencies of 0.3-0.4 THz [12].…”

Section: Introductionmentioning

confidence: 99%

A High-Current-Density Terahertz Electron-Optical System Based on Carbon Nanotube Cold Cathode

Yuan

et al. 2020

IEEE Trans. Electron Devices

View full text Add to dashboard Cite

A high-current-density terahertz electronoptical system based on a carbon nanotube (CNT) cold cathode has been investigated in order to solve notable mode competition in high order harmonic gyrotrons. Simulation results show that a near-axis electron beam can be generated, with beam current of 160mA at an accelerating voltage of 23.5kV. The source supports electron beam with velocity ratio of 1.1 and a guiding center radius of 57 µm. A narrow beam spatial distribution is evidenced by adjusting control anode voltage, satisfying the need for high operating current density in slow wave devices. The current density of the electron beam is up to 620 A/cm 2 and the velocity ratio is 0.44, with parallel energy accounts for 84% of the total energy.

show abstract

Analysis of a 0.6-THz Second Harmonic Gyrotron With Gradually Tapered Cavity

Cited by 8 publications

References 18 publications

Numerical Study of Interaction Efficiency for a 170GHz Megawatt‐Level Coaxial‐Gyrotron

Numerical Study of Interaction Efficiency for a 170GHz Megawatt‐Level Coaxial‐Gyrotron

Theoretical Study of Mode Competition in Terahertz Gyrotron With Second Harmonic Oscillation

A High-Current-Density Terahertz Electron-Optical System Based on Carbon Nanotube Cold Cathode

Contact Info

Product

Resources

About