Abstract:
A Hall effect thruster including: a discharge channel with an open downstream end; a cathode situated outside the discharge channel; an injector system configured to inject atoms of gas into the discharge channel, the injector system situated at an upstream end of the discharge channel and also forming a cathode; a heater device configured to heat the cathode; a measurement mechanism measuring temperature of the heater device, and a regulator circuit regulating the temperature such that the heater device heats so long as its temperature is less than a threshold temperature from which the thruster is capable of starting, and ceases to heat shortly after the threshold temperature has been reached.
Abstract:
The vacuum tube subject to the present invention comprises a filament and two pairs of a grid and an anode. The filament is tensioned linearly and emitting thermoelectrons. Both of the anodes are formed on the same face on a planar substrate. The filament is arranged parallel to the planar substrate at a position facing both of the anodes. Each of the grids is arranged, such that the grid faces the anode in the same pair at a first predetermined distance from the anode and has a second predetermined distance from the filament, between the anode and the filament. The vacuum tube comprises an intermediate filament fixing part fixing the filament at a position corresponding to an intermediate point between the anodes of the two pairs.
Abstract:
Die Erfindung bezieht sich auf eine direkt geheizte Kathode für Elektronenröhren, insbesondere Senderöhren, mit koaxialem Aufbau der Elektroden und deren Durchführungen, die einen Hohlzylinder (1) aufweist, der an einem Ende an einer ringförmigen Kathodenzuführung (12) und am anderen Endean einerKathodenkappe (9) befestigt ist, die an einer koaxial in dem Hohlzylinder (1) verlaufenden Stromzuführung (5) gehaltert ist. Bei dieser Kathode soll der Träger nicht aus Draht bestehen, so daß Inhomogenitäten auf der Kathodenoberfläche vermieden sind. Die Erfindung sieht hierzu vor, daß der Hohlzylinder (1) aus pyrolytischem Graphit besteht und mit einer dünnen Metallschicht (10), vorzugsweise aus Wolframkarbid und Thorium bzw. einem Thoriumoxid, überzogen ist. Eine erfindungsgemäße Kathode wird insbesondere bei Senderöhren verwendet (Fig. ).
Abstract:
A method of manufacturing an article with integral active electronic component includes using an additive manufacturing process to: a) form a non-electrically conductive substrate; b) form a non-electrically conductive perforated layer having an aperture; c) form electrically conductive anode and cathode elements spaced in the aperture; d) deposit a conductive electrical connection to each of the elements suitable for imparting an electrical potential difference between the elements; and e) form a non-electrically conductive sealing layer atop the perforated layer so as to retain and seal the aperture in the perforated layer.