Abstract:
One embodiment disclosed relates to an electron source for generating an electron beam. The electron source includes an electron emitter having a tip from which an electron beam is extracted. The electron further includes a non-planar extractor with an extractor opening and a built-in beam-limiting aperture. The extractor opening is larger than the beam-limiting aperture, and central axes of both the extractor opening and the beam-limiting aperture are aligned with the tip along a beam axis. Another embodiment relates to a method of generating an electron beam using an electron source having a non-planar extractor. Another embodiment relates to an array of electron sources for generating an array of electron beams. The array of electron sources includes an array of electron emitters and an array of non-planar extractor structures. Other embodiments, aspects and features are also disclosed.
Abstract:
One embodiment disclosed relates to an electron source for generating an electron beam. The electron source includes an electron emitter having a tip from which an electron beam is extracted. The electron further includes a non-planar extractor with an extractor opening and a built-in beam-limiting aperture. The extractor opening is larger than the beam-limiting aperture, and central axes of both the extractor opening and the beam-limiting aperture are aligned with the tip along a beam axis. Another embodiment relates to a method of generating an electron beam using an electron source having a non-planar extractor. Another embodiment relates to an array of electron sources for generating an array of electron beams. The array of electron sources includes an array of electron emitters and an array of non-planar extractor structures. Other embodiments, aspects and features are also disclosed.
Abstract:
A cold-cathode electron source having an improved use efficiency of an electron beam and a simple structure. The cold-cathode electron source comprises a gate electrode (4) provided on a substrate (2) through an insulating layer (3) and an emitter (6) extending through the insulating layer (3) and the gate electrode (4) and disposed in an opening of the gate. During the emission of electrons from the emitter (6), the relationships are satisfied: 10 [V/ mu m] > (Va-Vg) / (Ha-Hg) > Vg / VaVg / Hg [V/ mu m] > VaX10 X (9.7-1.3 X ln(Hg)) X (1000/Ha) where Ha [ mu m] is the distance between the anode and emitter, Va [V] is the voltage between the anode and emitter, Hg [ mu m] the distance between the gate and emitter, and Vg [ mu m] is the voltage between the gate and emitter.
Abstract:
To provide an electron gun that can improve the focus characteristics of a cathode ray tube by reducing the working area of the cathode, a cathode ray tube equipped with this electron gun that has favorable focus characteristics, and an image display device comprising this cathode ray tube that can achieve favorable images. An area on the electron emission surface of the cathode (K) that meets the beam hole (11A) of the first grid (11) forms an electron gun in closest proximity to the first grid (11). Provide a cathode ray tube equipped with this electron gun and further provide an image display device formed by this cathode ray tube.
Abstract:
The electronic gun intended for the shaping of materials, particularly for the production of printing blocks, comprises a heated cathode (1), a perforated anode (3) and an auxiliary electrode (2) brought to a negative potential higher than that of the cathode. The beam current is determined by the dimension of the active surface (11) of the cathode and the heating regulation of the cathode at a constant temperature.
Abstract:
Un canon pour un tube electronique a rayon lineaire possede une grille de commande (40) pour moduler le courant a rayon, qui consiste en une rangee d'elements conducteurs (50, 52) dont l'espacement est beaucoup plus grand que leur espacement avec la surface d'emission concave (31) de la cathode (30). Il s'est revele que lorsque cette condition est remplie, la grille (40) peut fonctionner a tension cathodique tandis que le courant de rayon est tire sans distorsion du champs d'acceleration electrique suffisamment pour perturber la mise au point du rayon. Ainsi lorsque la grille (40) est utilisee pour brancher et couper par impulsion le courant de rayon, elle peut avoir une polarisation nulle dans la configuration "marche", ce qui permet de simplifier considerablement le modulateur d'impulsion.