Abstract: The present invention generally relates to systems and methods for generating controllable beam of electrons using a hollow-cathode triode electron gun that substantially mitigate impact of back-streaming electrons. In one embodiment, a triode hollow-cathode electron gun is configured to provide electrons and substantially mitigates the impact of back-streaming electrons. The triode hollow-cathode electron gun includes a hollow cathode, a heating filament, an anode, a control grid, a shadow grid and a sleeve mechanically coupled to the hollow-cathode. The sleeve is substantially centered on the axis of the triode hollow-cathode electron gun and configured to maintain shape and trajectory of emitted beams of electrons.

Abstract: A light source has a discharge vessel which is filled with a filling gas, and an electron beam source which is arranged in vacuum or in a region of low pressure. The electron beam source generates electrons which are propelled through an entry foil into the discharge vessel. An electric field may be generated inside the discharge vessel.

Abstract: Systems and methods for providing a thermally optimized cold cathode heater in which a heater wire is disposed in a plurality of turns are shown. Turns of the plurality of turns are closely spaced to concentrate heat in an area of a host cathode device corresponding to a cold cathode position and turns of the plurality of turns are disposed to minimize introduction of heat in an area of the host cathode device not corresponding to the cold cathode position.

Abstract: The present invention discloses a multi-power control system for scanners. The method of the present invention has a mode of warm up time, which is controlled by a software that is embeded in a computer. Users can choose a mode of warm up time to control the warm up duration when a cathode ray tube needs. After scanning, users can determine whether the scanner is to operate or in standby status. When the user chooses the latter, the luminosity of the cathode ray tube is according to the user's pre-set. This multi-power control system not only can reduce the warm up time but also can be in harmony with the concept of enviromental protection.

Abstract: A cathode, an electron gun, and a cathode-ray tube, having a configuration wherein a heat source for heating an electron emission portion in which an electric field is applied to the tip so that electrons are pulled out is disposed, whereby instability and reduction in amount of emitted electron rays which are due to an effect of adsorbed gas molecules can be prevented from occurring.

Abstract: Disclosed is a heater for indirect-heated cathode having a heating element composed of a wire with a high specific resistance, such as titanium or titanium-based alloy, around which another wire with a low specific resistance is wound, and having a heat-resisting insulating material covering at least part of said heating element.

Abstract: The low pressure gas-filled thyratron is scalable in the long dimension. Internally the tube is formed as a tetrode, with an auxiliary grid placed between the cathode and the control grid. A DC or pulsed power source drives the auxiliary grid both to insure uniform cathode emission and to provide a grid-cathode plasma prior to commutation. The high voltage holdoff structure consists of the anode, the control grid and its electrostatic shielding baffles, and a main quartz insulator. A small gas flow supply and exhaust system is used that eliminates the need for a hydrogen reservoir and permits other gases, such as helium, to be used. The thyratron provides a low inductance, high current, long lifetime switch configuration; useful for switch-on applications involving large scale lasers and other similar loads that are distributed in a linear geometry.