Search Results - "Cross, Adrian W."

Sub-THz and THz Cherenkov radiation source with two-dimensional periodic surface lattice and multistage depressed collector by MacLachlan, Amy J., Zhang, Liang, Konoplev, Ivan V., Phelps, Alan D. R., Robertson, Craig W., MacInnes, Philip, Whyte, Colin G., Ronald, Kevin, Cross, Adrian W., Henderson, Mark A.

“…We present the theory, concept and design of an efficient, megawatt coherent Cherenkov radiation source based on a two-dimensional periodic surface lattice…”
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Microwave Undulator Using a Helically Corrugated Waveguide by Zhang, Liang, He, Wenlong, Clarke, Jim, Ronald, Kevin, Phelps, Alan D. R., Cross, Adrian W.

“…Microwave undulators (MUs) can be an alternative to the permanent magnet undulators in a free-electron laser. MUs normally employ a cavity-type structure that…”
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Beam dynamic study of a Ka-band microwave undulator and its potential drive sources by Zhang, Liang, Donaldson, Craig R., Clarke, Jim, Easton, Jack, Robertson, Craig W., Whyte, Colin G., Cross, Adrian W.

“…Microwave undulators (MUs) have great potential to be an alternative solution to permanent magnet undulators in a free electron laser (FEL) when shorter…”
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Simulations of the Self-Focused Pseudospark-Sourced Electron Beam in a Background Ion Channel by Zhang, Liang, Phelps, Alan D. R., Ronald, Kevin, Cross, Adrian W.

“…Using pseudospark discharge sourced electron beams for the generation of high-peak-power millimeter and terahertz radiation has attracted increasing research…”
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Potentials of Machine Learning in Vacuum Electronic Devices Demonstrated by the Design of a Magnetron Injection Gun by Zhang, Liang, Cross, Adrian W.

“…Great progress has been made on machine learning and its applications are expanding rapidly nowadays. Through the case study of optimizing a magnetron…”
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Design, Simulation, and Cold Test of a W-Band Double Nonparallel Staggered Grating Backward Wave Oscillator by Zhang, Jin, Alfadhl, Yasir, Chen, Xiaodong, Zhang, Liang, Cross, Adrian W.

“…A novel double nonparallel staggered grating (DNPSG) slow wave structure (SWS) is proposed to enhance the coupling impedance in a <inline-formula> <tex-math…”
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Characteristics of Pseudospark Discharge in Particle-in-Cell Simulations by Zhang, Liang, He, Wenlong, Chen, Xiaodong, Zhang, Jin, Cross, Adrian W.

“…In this article, the characteristics of the pseudospark (PS) discharge were studied through particle-in-cell simulations with the consideration of the external…”
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Study on Wideband THz Backward Wave Oscillator Driven by Pseudospark-Sourced Sheet Electron Beam by Zhang, Jin, Zhang, Tianzhong, Alfadhl, Yasir, Chen, Xiaodong, Zhang, Liang, Yin, Huabi, Cross, Adrian W.

“…A backward wave oscillator (BWO) based on a double-staggered grating (DSG) slow wave structure (SWS) is investigated as a high-power wideband terahertz (THz)…”
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Simulation and Experiments of a W -Band Extended Interaction Oscillator Based on a Pseudospark-Sourced Electron Beam by Yong Yin, Wenlong He, Liang Zhang, Huabi Yin, Robertson, Craig W., Cross, Adrian W.

“…This paper presents the first experimental results of an extended interaction oscillator (EIO) based on a pseudospark-sourced electron beam, which produced a…”
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Magnetron Injection Gun for High-Power Gyroklystron by Zhang, Liang, Nix, Laurence J. R., Cross, Adrian W.

“…A magnetron injection gun (MIG) can generate an annular electron beam with a high transverse-to-axial velocity ratio for gyrotron devices. This article…”
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Feedhorn synthesis using a parameterized aperture field distribution by Zhang, Liang, Whyte, Colin G., Donaldson, Craig R., Ronald, Kevin, Cross, Adrian W.

“…In this paper, we present an improved method for synthesizing smooth-profiled horns. A direct connection between the mode compositions and far-field parameters…”
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Design of a 48 GHz Gyroklystron Amplifier by Nix, Laurence J. R., Zhang, Liang, Cross, Adrian W.

“…The continued development of linear accelerators at higher frequencies poses several technological challenges. One such challenge is the requirement for…”
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Study of a 0.2-THz Extended Interaction Oscillator Driven by a Pseudospark-Sourced Sheet Electron Beam by Shu, Guoxiang, He, Wenlong, Zhang, Liang, Yin, Huabi, Zhao, Junping, Cross, Adrian W., Phelps, Alan D. R.

“…The study of a planar G-band extended interaction oscillator (EIO) driven by a pseudospark-sourced (PS) sheet electron beam is presented. This enables the…”
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Electron Injector Based on Thermionic RF-Modulated Electron Gun for Particle Accelerator Applications by Zhang, Liang, Adam, Georgia, Militsyn, Boris, He, Wenlong, Cross, Adrian W.

“…In this article, the design and simulation of an electron injector based on a thermionic RF-modulated electron gun for particle accelerator applications is…”
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Design and Measurement of a Broadband Sidewall Coupler for a W-Band Gyro-TWA by Liang Zhang, Wenlong He, Donaldson, Craig R., Garner, Jason R., McElhinney, Paul, Cross, Adrian W.

“…The input coupler is an important component for a microwave amplifier. In this paper, a sidewall single-hole input coupler for a W-band gyrotron traveling-wave…”
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Study of a 0.35 THz Extended Interaction Oscillator Driven by a Pseudospark-Sourced Sheet Electron Beam by Xie, Jie, Zhang, Liang, Yin, Huabi, He, Wenlong, Phelps, A. D. R., Ronald, Kevin, Chen, Xiaodong, Zhang, Jin, Alfadhl, Yasir, Yuan, Xuesong, Meng, Lin, Cross, Adrian W.

“…A compact high-power extended interaction oscillator (EIO) driven by a pseudospark-sourced (PS-sourced) sheet electron beam (SEB) is presented at 0.35 THz. It…”
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Dispersion Curve of the Helically Corrugated Waveguide Based on Helicoidal Coordinate Transform by Zhang, Liang, Easton, Jack, Donaldson, Craig R., Whyte, Colin G., Cross, Adrian W.

“…This article presents the dispersion curve study of the helically corrugated waveguide (HCW) using the 2-D finite element method (FEM) method based on the…”
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Low-Loss Transmission Line for a 3.4-kW, 93-GHz Gyro-Traveling-Wave Amplifier by Donaldson, Craig R., Zhang, Liang, He, Wenlong, Cross, Adrian W., Ronald, Kevin, Whyte, Colin G.

“…In this article, a transmission line system for the propagation of millimeter-wave radiation is presented. The full system includes a TE 11 -to-TE 01 mode…”
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The Effects of Electron Cyclotron Absorption in Powerful Narrow-Band Sub-THz Oscillators Exploiting Volume and Surface Modes by MacLachlan, A. J., Robertson, C. W., Cross, Adrian W., Phelps, A. D. R.

“…We present the theory, design, and numerical modeling of novel, pulsed sub-THz oscillators based on cylindrical, 2-D periodic surface lattice (PSL) interaction…”
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Fivefold Helically Corrugated Waveguide for High-Power W-Band Gyro-Devices and Pulse Compression by Donaldson, Craig R., Zhang, Liang, Hiscock, Peter, Harris, Michael, Beardsley, Matthew J., Huggard, Peter G., Whyte, Colin G., Cross, Adrian W., He, Wenlong

“…The design, simulation, manufacture, and measurement of a <inline-formula> <tex-math notation="LaTeX">{W} </tex-math></inline-formula>-band fivefold (5F)…”
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