Publication

Design and Testing of an Electron-Gun Producing a Segmented Sheet Beam for a Quasi-Optical Gyrotron

Minh Quang Tran
1992
Journal Articles

Abstract

A high-power sheet beam electron gun for a quasi-optical gyrotron has been developed. The gun produces two beams with rectangular cross sections, with one beam segmented into 11 beamlets. These beamlets are spaced so as to be in line with the maxima of the RF field profile in the resonator of a 120-GHz quasi-optical gyrotron. The maximum current in the segmented beam is nominally 34 A, while the that for the unsegmented beam is 68 A. The gun has been tested, and has operated essentially as predicted by 2D and 3D theory. In particular, the overall beam shape is largely undistorted, and the beamlets are, for most cases, well aligned.

Official source

https://infoscience.epfl.ch/entities/publication/da10d9e7-f451-4632-9f5d-bc08444706b8

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Minh Quang Tran
1992
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/da10d9e7-f451-4632-9f5d-bc08444706b8

About this result

Related concepts (24)

Transmission electron microscopy

Transmission electron microscopy (TEM) is a microscopy technique in which a beam of electrons is transmitted through a specimen to form an image. The specimen is most often an ultrathin section less than 100 nm thick or a suspension on a grid. An image is formed from the interaction of the electrons with the sample as the beam is transmitted through the specimen. The image is then magnified and focused onto an imaging device, such as a fluorescent screen, a layer of photographic film, or a sensor such as a scintillator attached to a charge-coupled device.

Electron gun

An electron gun (also called electron emitter) is an electrical component in some vacuum tubes that produces a narrow, collimated electron beam that has a precise kinetic energy. The largest use is in cathode-ray tubes (CRTs), used in older television sets, computer displays and oscilloscopes, before the advent of flat-panel displays. Electron guns are also used in field-emission displays (FEDs), which are essentially flat-panel displays made out of rows of extremely small cathode-ray tubes.

Electron microscope

An electron microscope is a microscope that uses a beam of electrons as a source of illumination. They use electron optics that are analogous to the glass lenses of an optical light microscope. As the wavelength of an electron can be up to 100,000 times shorter than that of visible light, electron microscopes have a higher resolution of about 0.1 nm, which compares to about 200 nm for light microscopes.

Related publications (9)

Design and Testing of an Electron-Gun Producing a Segmented Sheet Beam for a Quasi-Optical Gyrotron

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