A one-coordinate x-ray detector for digital subtraction angiography using synchrotron radiation is described. It comprises two x-ray-sensitive lines, each having 128 independent channels of scintillation counters. The detector is designed to simultaneously measure the intensities of two linear monochromatic beams being 8–10 mm distant from each other. The spatial resolution of each line ranges from 0.2 to 2 mm. The maximum counting rate is 6 MHz for each channel, and the detection efficiency of the 33.2-keV quanta is close to 100%. Preliminary results of the testing of the detector channels on synchrotron radiation beam are given.

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Electronic devices intended to visualize x-ray images are intensively evolved on the basis of linear video signal shapers (LVSS): x-ray vidicons, image vidicons with x radiation-to-light conversion using luminophors and scintillators, charge-coupled devices, photodiode arrays and matrices, as well as on the basis of various electro-optical converters: electrostatically or magnetically focused and microchannel image intensifers. Their broad application to x-ray diffraction topography, structue analysis, diffractometry, tomography, and radiography has necessitated (already from 1982) the introduction of a common criterion for calibration of their sensitivity—the flux density of monoenergetic photons. In particular, when calibrating the LVSS it is necessary to find a direct, unambiguous correspondence between this criterion and the amplitude of a video signal. For this purpose, a device has been designed which is used both for absolute calibration of LVSSs and, of course, for a trivial standardization of x-ray counters with respect to their efficiency. This device is based on two commercial gas proportional counters whose position in space is aligned for a successive, one after another, ‘‘threading’’ of them to the x-ray beam monochromatized by means of the crystal-diffraction scheme (Lukirsky’s method). Both counters are identical to each other. Of course, each counter has input and output windows. The beam is shaped by diaphragms and by two slits, horizontal and vertical, with cylinders as ‘‘knives.’’ One of the slits is scanned in the diffraction plane by a stepper motor. The counters are tested for identity by selecting them depending on their counting properties and energy resolution, with the escape peaks taken into account. All these operations and the rest of the measurements are performed by electronic units in the CAMAC standard, controlled by a microcomputer. On the test monochromatized x-ray beam, the device is interchangeable with a LVSS or a counting detector being standardized. The test beam is monitored. The width of the slit being scanned is shaped up to 10 μm, thereby allowing the LVSS to be standardized for geometrical resolution.

The article deals with the issues of improving the efficiency of control of operational and technical characteristics of the aircraft group by ensuring the completeness, reliability and relevance of data collection on the results of their operation. Proposals have been formed to combine aircraft maintenance work and collect the necessary data in a single automated real-time process. New approaches to automation of information processes of aircraft technical operation on the basis of wide use of mobile computer devices, document flow in electronic form and means of automatic identification United by the corresponding software components are offered. Mathematical models, algorithms and supporting software have been developed. The methodical approach for the automated creation of software applications using the tools of the software and technology platform is considered. A software and hardware complex for collecting and monitoring real-time parameters of the technical condition and operational and technical characteristics of the aircraft group was developed, the main functions of its components and the scheme of interaction were determined. It is shown that the proposed methodological and software-technical solutions allow to provide an increase in the reliability and efficiency of the assessment of operational and technical characteristics of aircraft using both single and integrated (complex) indicators.