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Summary form only given. The physical principles of hard X-ray (HXR) production at a facility of the plasma focus type with plane geometry of electrodes are represented. An internal selfgeneration of the accelerating field, as a result of sharp power peaking for the times/spl sim/1O**8 s, occurs in the given device. The transformation of practically the whole discharge current into the electron beam-the energy of the main part of electrons does not exceed 100-150 KeV-is attained by the corresponding regime selection. The results of studying the X-ray radiation field and its spectral and time characteristics are reported.