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12 Nov 2001

Volume 79, Issue 20, pp. 3215-3366

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Self-focused electron beams produced by pyroelectric crystals on heating or cooling in dilute gases

J. D. Brownridge and S. M. Shafroth

Appl. Phys. Lett. 79, 3364 (2001); http://dx.doi.org/10.1063/1.1418458 (3 pages) | Cited 20 times

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Self-focusing, spatially stable, electron beams are produced by cylindrical pyroelectric crystals such as LiNbO3 in dilute gases on cooling provided that heating is done from the +z base. Beam energies up to 170 keV have been observed. A 4 mm diameter×10 mm crystal heated to 160 °C gives rise to spatially stable beams with a focal length of 22 mm and a 1 mm spot size. Here we present photographic as well as electronic proof of the existence of these electron beams. © 2001 American Institute of Physics.
Show PACS
79.40.+z Thermionic emission
77.70.+a Pyroelectric and electrocaloric effects
41.75.Fr Electron and positron beams
41.85.-p Beam optics
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