Faculty of Physics
M.V.Lomonosov Moscow State University

On the charge distribution on the surface of a LiTaO$_3$ single crystal and its effect on the characteristics of a pyroelectric accelerator

P. G. Shapovalov$^{1,2}$, A. N. Oleinik$^2$, M. E. Gilts$^2$, A. S. Kubankin$^{2,3}$

Memoirs of the Faculty of Physics 2023. N 4.

  • Article

The article presents the results of finite element modeling of a pyroelectric accelerator based on a single crystal of lithium tantalate. The influence of the charge distribution on the crystal surface on the characteristics of the electron flow is considered. A model using an axially symmetric charge distribution obtained by interpolating the experimental dependence leads to the expected effects of self-focusing and monoenergicity of the flow. Attention is also paid to the model "triangular"\; distribution. This distribution can be caused by the structure of the lithium tantalate domain walls when its temperature changes. Simulation results for both distributions are discussed.

Received: 2023 May 14
Approved: 2023 August 28
79.70.+q Field emission, ionization, evaporation, and desorption
77.22.-d Dielectric properties of solids and liquids
77.70.+a Pyroelectric and electrocaloric effects
78.20.-e Optical properties of bulk materials and thin films
P. G. Shapovalov$^{1,2}$, A. N. Oleinik$^2$, M. E. Gilts$^2$, A. S. Kubankin$^{2,3}$
$^3$P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Issue 4, 2023

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