Abstract: A gas laser arrangement includes a discharge tube between a cathode and an anode, the discharge tube including a central discharge channel and at least one gas return channel. A blocking electrode is provided at the openings of the gas return channels at least in the cathode space and possibly also in the anode space, the blocking electrode being connected to a blocking voltage to avoid misfirings of the laser through the gas return channels.

Abstract: A gas laser arrangement includes a discharge tube arranged between a cathode and anode and including a central discharge channel and at least one gas return channel. An auxiliary electrode for pre-discharge is allocated to the cathode, the auxiliary electrode being connected to an operating voltage source through a resistor.

Abstract: An electrode system for a high voltage circuit breaker is disclosed which comprises at least one nozzle-like electrode end in which the contour of the end face in cross section in the axial direction of the electrode end forms part of an ellipse. The ellipse may preferably be inclined relative to the axis of rotation of the electrode. The electrode system can be used in circuit breakers with two oppositely-disposed nozzle-like electrode ends and in disconnect switches with only a single nozzle-like electrode end. Concentration of the field at the end face of the nozzle-like end is avoided and thereby dielectric strength is increased.

Abstract: A plasma image display device with a gas discharge space and an electron acceleration space in which the gas discharge space is divided off from the electron acceleration space by a light transparent, high vacuum tight partition having a side facing a fluorescent screen which is provided with a photo cathode as an electron source to provide, due to high accelerating voltages, a high image amplification and good image definition.