6 December 2006 Generation of focused electron beam and x-rays by pyroelectric and photogalvanic crystals
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Proceedings Volume 6023, Tenth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals; 60230G (2006) https://doi.org/10.1117/12.648199
Event: Tenth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, 2005, Alushta, Ukraine
Abstract
We have developed a model to explain the phenomena of electron focusing by pyroelectric and photogalvanic crystals. The pyroelectric crystals used to compare experiments with theory were Fe doped and un-doped LiNb03. The crystals were either heated from the +z end or illuminated with a laser (to test photogalvanic effect). Heating the crystals by passing a current through a resistor attached to the +z end produced the pyroelectric effect: a change in polarization in response to a change in temperature. Illuminated with a CW solid-state diode pumped laser (532 nm, 100 mW) produces the photogalvanic effect: the build up of charge on the polar surfaces of the crystal. In both cases the polar ends of the crystal becomes electrically charged and produced self-focusing electron beams that were imaged on a ZnS screen. Using different targets we have produced x-rays, and demonstrated x-ray imaging of metal masks.
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N. Kukhtarev, T. Kukhtareva, M. Bayssie, J. Wang, J. D. Brownridge, V. Rotaru, "Generation of focused electron beam and x-rays by pyroelectric and photogalvanic crystals", Proc. SPIE 6023, Tenth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, 60230G (6 December 2006); doi: 10.1117/12.648199; https://doi.org/10.1117/12.648199
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