Abstract: An arena light reflecting assembly includes an asymmetric parabolic shaped reflector having an exit aperture. The reflector surrounds a horizontally extending high intensity light source and has a focal axis that lies along an axis of an arc tube of the light source so that the reflector acts as a collimator redirecting light from the light source into essentially parallel rays from the exit aperture. A pan circumscribes the exit aperture and a louver assembly is disposed within the exit aperture behind a front surface of the pan.

Abstract: An arc suppressor is provided for an electron gun of the type used e.g. in semiconductor lithography equipment. The arc suppressor prevents damaging emission properties of the electron gun either due to variation of the cathode work function or any damage to the emitter apex. The arc suppressor includes a resistance and an inductor in series with each electrode lead providing voltage or current to the various electrodes of the electron gun. The inductance is provided by a ferrite toroid which contains a plurality of holes in addition to the main central hole. The leads for each electrode are wrapped around the toroid through the various holes, with one hole being provided for each lead. Thus advantageously each lead is isolated magnetically from the others, reducing the transformer and capacitive effects that couple one lead to another.

Abstract: A spark gap system is disclosed that includes an enclosure which contains a gas medium; two rail electrodes which extend into the enclosure and which are separated from each other by the gas medium, a trigger blade which ionizes the gas medium to cause it to be a conductor between the two electrodes through a series of electrical arc channels in the gas medium, and an acoustic driver which generates a standing acoustic wave in the gas medium. The standing acoustic wave generates a pressure density profile that distributes the electrical arc channels along the wave nodes of the standing acoustic wave. This has the result of evenly distributing the electrical arc channels along the first and second rail electrodes when the gas medium is ionized, and improving the spark gap system performance.

Abstract: An electron beam controlled switch employing a radial geometry and a Wire-Ion Plasma-Electron gun (WIP E-gun) as an electron source is disclosed. The switch comprises an inner cylinder that serves as the WIP E-gun cathode, a cylindrical grid that serves as the WIP E-gun anode, an array of fine wire anodes disposed in the WIP E-gun ionization chamber, a foil support cylinder to support the foil windows which also serve as the switch anode, and an outer cylinder which also serves as the switch cathode. The WIP E-gun and ionization chamber is gas filled at low pressure, while the switch cavity is filled with a high pressure gas. A voltage pulse is applied to the wire anodes to ionize the gas in the ionization chamber. The ions are extracted through the chamber grid and accelerated through a high voltage to bombard the E-gun cathode.

Abstract: Device for triggering the discharge of flash tubes, comprising a priming transformer whose primary winding is connected up in series with a priming capacitor and whose secondary winding is connected up in series with at least a flash tube, an ignitron connected up in series with the tube and a transformer for controlling that ignitron, the primary winding of that transformer being connected up in series with a control capacitor.