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An X-ray diffractometer with a mobile emitter-detector system is able to perform various X-ray examinations of a stationary sample. The design for this instrument is described, along with its operating principles and control programs. Owing to its high-precision angular movement sensors and its two detectors (one of these, a linear position-sensitive detector, has a working length of 100 mm and a resolution of <0.2 mm), the diffractometer can be used in both traditional and nontraditional experiments on X-ray reflection, scattering, and absorption. Results from using this instrument in reflectometry and X-ray tomography are presented as an example. Fig. 1. External appearance of the diffractometer with a mobile emitter-detector system.

The Time-Projection Chamber (TPC) is the main detector for tracking and identification of charged particles in the MultiPurpose Detector (MPD) at new accelerator complex the Nuclotron-based Ion Collider Facility (NICA) in Joint Institute for Nuclear Research (JINR), Dubna city, Moscow region. The status of the TPC construction is presented.

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