Abstract: RF beam sources, also referred to as HPM sources, serve in the non-lethal destruction, interference or screening of targets. In an autonomous RF beam source (2) operated with an explosive material (10), a fuze (11) of a magnetic flux compressor (4) is ignited by a battery (3), with time or impact control. Consequently, the highly-explosive material (10) located in the liner ruptures the coil body in a conventional manner, and the individual windings (6.2) are short-circuited consecutively. The generated voltage is then amplified and transmitted via a high-pressure spark gap to a UWB chopper for generating pulses, which are subsequently radiated via a broadband antenna that is adapted with the cable resistance of the UWB pulse. In contrast, the invention provides constructing an explosive-triggered RF beam source (2) solely from a pulse generator or a pulse-generation device (4), whose generated pulses are radiated directly at a target.

Abstract: A refrigerator for cryogenic pumps, cryostats and the like, includes a housing having a cylindrical working volume inside the housing and a displacement element capable of moving in a reciprocal manner within the working volume. The displacement element is driven by a gas drive. To reduce vibrations, the displacement element is forcibly guided.

Abstract: This invention concerns a method of operating a cryogenic cooling device (1) with a cylinder (4, 5) in which a piston (6, 7) reciprocates and with a gas drive (8, 9) which produces the motion of the piston. In order to reduce the vibrations which occur during operation, the invention proposes that the gas drive (8, 9) is controlled in such a way that the piston (6, 7) is only accelerated for part of the stroke.

Abstract: In a gas discharge device having a gas discharge channel, which comprises two gas discharge electrodes and a gas discharge volume lying between said electrodes, having an energy storage circuit connected by a switching device to the gas discharge electrodes for producing a current surge flowing between a first output terminal and a second output terminal for operating a gas discharge, and having an ignition device for separate ignition of the gas discharge, in order to improve said device in such a way that it operates better and more reliably, it is proposed that the switching device comprises a voltage divider lying between the output terminals and comprising a first and a second impedance, that the gas discharge electrodes are connected in parallel to the first impedance and a spark gap is connected in parallel to the second impedance, that the first impedance is so dimensioned that, in the absence of a gas discharge, a voltage lying below the breakdown voltage of the gas discharge electrodes is applied to

Abstract: A waveguide laser comprises a laser-active medium, a pump source for the laser-active medium and a resonator with a waveguide extending in an axial direction and formed from a cylindrical, outer optical waveguide surface and a cylindrical, inner optical waveguide surface. A resonator radiation field extends substantially parallel to the axial direction between the outer and inner optical waveguide surfaces. The waveguide laser further comprises two cavity mirrors between which the resonator radiation field extends and of which at least a first mirror comprises successive maximum and minimum reflectivity values in a direction azimuthal to the axial direction. The maximum and minimum reflectivity values of the first cavity mirror, viewed in the azimuthal direction, are arranged at the location of maximum and minimum intensities of a selected azimuthally closed mode of the resonator, which mode is enclosed by the resonator radiation field.