Siemens Aktiengesellschaft

Carl-Zeiss-Stiftung

Gerd Herziger

Klemens Schmitt

Horst Seunik

Helmut Schuelke

Rolf Wester

Willi Neff

A gas laser which has transverse high frequency exitation and which is improved in efficiency and in power density by the use of a coupling structure which assures a roughly positional independent electrical field strength for each neutral particle density in the full discharge space and this is accomplished with capacitance electrodes (2) between which the discharge space of a laser are arranged in a cavity resonator and wherein the mutual spacings between the capacitive electrodes (2) are positionally dependent and are selected such that they assure that an electrical field strength proportional to the neutral particle density occurs.

Gas laser with different positional dependent mutual spacings between

A virtually punctiform plasma source of high-intensity radiation in the X-ray region is produced at the open downstream end of a gas-filled discharge space defined by and between concentric cylindrical inner and outer electrodes. At the closed upstream end, the electrodes which define this discharge space are directly connected to a low-inductance high-power switch which serves for momentarily connecting the electrodes to a source of stored electric energy. At the closed end of the discharge space, the inner electrode is concentrically surrounded by an insulator which has a high coefficient of secondary-electron emission. In closely opposed adjacency to the insulator region of the inner electrode is an annular emission electrode which is at the potential of the outer electrode, the emission electrode being positioned at close radial offset from the insulator, and the offset being less than the mean free path in the gas of the discharge space. A gas discharge is produced in the discharge space at a well-defined distance downstream from the emitter electrode, and the discharge in a homogeneous plasma layer, which moves toward the open downstream end of the discharge space and there forms a plasma focus of extremely high particle density and small diameter, which focus provides the plasma source of X-radiation.

Apparatus for generating a source of plasma with high radiation

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Rossdorf, Germany

Gerd Herziger