Space‒time inhomogeneity of the electron flow in pyroelectric X-ray sources


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Abstract

The operating conditions of X-Ray sources based on LiNbO3 crystals are investigated during heating-cooling cycles. It is demonstrated that the radiation intensity is unstable. The radiation is accompanied by electrical breakdowns in the Z plane of the crystals and emission of photon packets not described by the Poisson distribution. Visualization of the electron beam through the grid electrode by a luminescent screen showed that the electron beam is not uniform in the Z-plane of the crystal and greatly changes with temperature. It is found that, under definite conditions, the numerous redistributions of the intense emission zones occurred between different areas at Z-surface of the crystal. Possible reasons for the observed effects are examined. The obtained data are important for creating pyroelectric X-ray and neutron sources presuming the usage of strong electric fields whose strength reaches 105 V/cm.

About the authors

V. A. Andrianov

Skobeltsyn Institute of Nuclear Physics

Author for correspondence.
Email: andrva22@mail.ru
Russian Federation, Moscow, 119991

A. A. Bush

Moscow Technological University (MIREA)

Email: andrva22@mail.ru
Russian Federation, Moscow, 119454

A. L. Erzinkyan

Skobeltsyn Institute of Nuclear Physics

Email: andrva22@mail.ru
Russian Federation, Moscow, 119991

K. E. Kamentsev

Moscow Technological University (MIREA)

Email: andrva22@mail.ru
Russian Federation, Moscow, 119454

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