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X-ray Flashes and Pulsating Electron Flow in X-Ray Generators Based on SBN-61 Crystals
Russian version
DOI: 10.21883/PSS.2022.10.54238.385
Andrianov V. A.1, Erzinkian A. L.1, Ivleva L. I.2, Lykov P. A.2
1Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia
2Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
Email: andrva22@mail.ru
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In an X-ray generator based on a ferroelectric crystal of barium-strontium niobate Sr0.61Ba0.39Nb2O6 (SBN-61) at a temperature of about 50oC, pulsations of the electron flux and X-ray radiation were detected with an increase in gas pressure in the range 2·10-2-10-1 Torr. The electron flux had the shape of a cross in the crystal plane. The flash duration did not exceed 0.04 seconds. The pulsation period varied from 0.2 seconds at the beginning and up to 5-10 s at the end at a pressure of ~0.1 Torr. The observed effect is explained by the movement of domain boundaries on the depolarized crystal face in vacuum conditions, resulting in a large surface charge and, accordingly, an electric potential, leading to the formation of a pulsed electron flux. Keywords: X-ray radiation, electron flux, SBN-61 crystal, ferroelectric domains.
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