Detection Units for X-Ray Radiation

Units for the detection of X-ray radiation are described. Each unit consists of a multiproportional counter detector, a gas supply system and accompanying electronics, including an automatic gas gain - stabilization circuit. In the units detectors filled with Ne/CO2 as well as Ar/CO2 gas mixtures are being used. Measures are described to overcome pressure variations in the detector, total as well as partial, due to gas diffusion through the detector window.