The electron gun of the cathode ray tube. Part I

Moss, Hilary

doi:10.1049/jbire.1945.0003

Cited by 3 publications

(1 citation statement)

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“…Une explication qualitative de ces phénomènes peut être déduite à partir des travaux de différents auteurs [17], [11], [12], [161. Elle s'appuie sur le fait que la surface émissive augmente lorsque VGI diminue et qu'il y a une distorsion du champ au niveau de la cathode [6].…”

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Mesure de la densité de courant dans une section droite d'un faisceau d'électrons

Bleich¹

1966

Rev. Phys. Appl. (Paris)

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2014 L'auteur propose une méthode électronique rapide générale d'étude expérimentale des caractéristiques de faisceaux d'électrons qui réalise, pour chaque point de la section étudiée, une transposition topologique de la mesure sur un écran oscilloscopique d'observation.Les principaux résultats d'une étude de la densité électronique et de sa répartition dans un faisceau issu d'un canon triode haute tension expérimental, illustrent une application de cette méthode.Abstract. 2014 A fast electronic method for experimental investigation of the characteristics of electron beams is proposed by the author ; this consists of a topological transposition on an oscilloscope screen for observation of the measurement which is to be performed, for every point of the cross-section.An application of this method is illustrated with the main results of a study of the electron density and of its distribution in a beam from an experimental high voltage triode gun.

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Mesure de la densité de courant dans une section droite d'un faisceau d'électrons

Bleich¹

1966

Rev. Phys. Appl. (Paris)

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The Challenge of the Cathode-Ray Tube

Lehrer¹

1985

Flat-Panel Displays and CRTs

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Theory of cathode trajectory characterization by canonical mapping transformation

Fujita¹,

Shimoyama²

2005

Microscopy

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The paraxial lens theory cannot directly be applied to the cathode trajectories inside the gun. This inconvenience makes the interpretation of cathode trajectories difficult since one cannot use the physical concepts familiar in the paraxial lens theory, such as focal length and magnification factor. We have proposed the canonical mapping transformation (CMT) to describe the electron trajectories inside the gun by relating the ray conditions on the cathode surface to those in the crossover plane. The method takes as variables the distance along the surface and the sine of the ray angle with respect to the surface normal to define ray conditions. It has been shown that the CMT can be characterized by a small number of optical parameters. One of the parameters is the 'electron gun focal length', an extension of the image side focal length in the paraxial lens theory. The crossover size of a triode gun can be calculated from the electron gun focal length and the initial transverse energy spread. The calculation predicts the dependence of the crossover size on the grid voltage due to the change in the electron gun focal length. The prediction is compared with the measurement and shows good agreement with it. Since the CMT optical parameters can be calculated from the representative trajectories only and as they predict practically all the necessary source properties of guns, the CMT can be used as a practical tool in the designing of various types of electron guns.

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The electron gun of the cathode ray tube. Part I

Cited by 3 publications

References 0 publications

Mesure de la densité de courant dans une section droite d'un faisceau d'électrons

Mesure de la densité de courant dans une section droite d'un faisceau d'électrons

The Challenge of the Cathode-Ray Tube

Theory of cathode trajectory characterization by canonical mapping transformation

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