First observation of elliptical sheet beam formation with an asymmetric solenoid lens

Russell, Steven; Wang, Z. F.; Haynes, W.B.; Wheat, R.M.; Carlsten, Bruce E.; Earley, L.M.; Humphries, S.; Ferguson, P.

doi:10.1103/physrevstab.8.080401

Cited by 48 publications

(14 citation statements)

References 6 publications

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“…Here, normalized operating frequency is x 0 a 1 /c ¼ 15.2392. In addition, the operating wavelength is determined by the total dispersion equation (23). As seen from Fig.…”

Section: Simulation Of Dispersion Characteristics and Growth Ratementioning

confidence: 99%

Terahertz electromagnetic wave generation and amplification by an electron beam in the elliptical plasma waveguides with dielectric rod

Rahmani¹,

Jazi²,

Heidari-Semiromi³

2014

Physics of Plasmas

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The propagation of electromagnetic waves in an elliptical plasma waveguide including strongly magnetized plasma column and a dielectric rod is investigated. The dispersion relation of guided hybrid electromagnetic waves is obtained. Excitation of the waves by a thin annular relativistic elliptical electron beam will be studied. The time growth rate of electromagnetic waves is obtained. The effects of relative permittivity constant of dielectric rod, radius of dielectric rod, accelerating voltage, and current density of the annular elliptical beam on the growth rate and the frequency spectra are numerically presented.

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“…Here, normalized operating frequency is x 0 a 1 /c ¼ 15.2392. In addition, the operating wavelength is determined by the total dispersion equation (23). As seen from Fig.…”

Section: Simulation Of Dispersion Characteristics and Growth Ratementioning

confidence: 99%

Terahertz electromagnetic wave generation and amplification by an electron beam in the elliptical plasma waveguides with dielectric rod

Rahmani¹,

Jazi²,

Heidari-Semiromi³

2014

Physics of Plasmas

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“…Spatial resolution on the order of 10 lm and linear response as a function of current density are the main advantages of this method. 28 A different diagnostic system was used by Russel et al 29 to experimentally characterize their elliptical aperture focusing solenoid which transforms a circular beam to an elliptical one. It consists of a circular 0.001-in.…”

Section: Experimental Setup and Electron Gun Assemblymentioning

confidence: 99%

Design and characterization of electron beam focusing for X-ray generation in novel medical imaging architecture

et al. 2014

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A novel electron beam focusing scheme for medical X-ray sources is described in this paper. Most vacuum based medical X-ray sources today employ a tungsten filament operated in temperature limited regime, with electrostatic focusing tabs for limited range beam optics. This paper presents the electron beam optics designed for the first distributed X-ray source in the world for Computed Tomography (CT) applications. This distributed source includes 32 electron beamlets in a common vacuum chamber, with 32 circular dispenser cathodes operated in space charge limited regime, where the initial circular beam is transformed into an elliptical beam before being collected at the anode. The electron beam optics designed and validated here are at the heart of the first Inverse Geometry CT system, with potential benefits in terms of improved image quality and dramatic X-ray dose reduction for the patient. V C 2014 AIP Publishing LLC. [http://dx

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“…Now, there is an emerging need for high frequency (100GHz-300GHz), high power (peak power greater than several millions of watts) sources for homeland security, advanced radars, plasma chemistry reactors, materials testing, medical/biomedical research, and military application [1][2][3][4][5][6][7][8][9][10][11]. Sheet electron beam driven vacuum electron device (or planar device) meets this need well, because of its special virtues: 1) Higher net current can be transport at reduced space-charge field when it is used to produce high-power radiation.…”

Section: Introductionmentioning

confidence: 99%

Producing high current sheet electron beam with compact, repetitive Tesla generator

Wang

Gong

Wei

et al. 2012

The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology

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Sheet electron beam device has the potential for high-power millimeter wave to terahertz regime radiation. A key part of this system is a high current sheet electron beam source. This paper introduces our currently ongoing program on producing high current high aspect ratio sheet electron beam with compact, repetitive 160KV generator. In our experimental, a cathode which looks like a blade and a slit anode is fabricated. High current sheet electron beam is transported in a solenoid. Here we report the experimental demonstration.

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First observation of elliptical sheet beam formation with an asymmetric solenoid lens

Cited by 48 publications

References 6 publications

Terahertz electromagnetic wave generation and amplification by an electron beam in the elliptical plasma waveguides with dielectric rod

Terahertz electromagnetic wave generation and amplification by an electron beam in the elliptical plasma waveguides with dielectric rod

Design and characterization of electron beam focusing for X-ray generation in novel medical imaging architecture

Producing high current sheet electron beam with compact, repetitive Tesla generator

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