19 November 2003 Electron beams generation in space-charge regime
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Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.529252
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy
Abstract
We generated electron beams by a Nb polycrystalline photocathode illuminated by different wavelength excimer lasers; an XeCl and a KrCl. The cathode surface roughness was 0.09. At low accelerating voltage, the electron beams were governed by the space-charge effect and their intensity never resulted clipped as previous by the Child-Langmuir law. Instead, the output current waveform was similar to the laser one under saturation regime. The quantum efficiencies were 3.2 x 10-5 and 6.7 x 10-7 for the KrCl and XeCl irradiation, respectively.
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L. Martina, Vincenzo Nassisi, A. Pedone, G. Raganato, "Electron beams generation in space-charge regime", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); doi: 10.1117/12.529252; https://doi.org/10.1117/12.529252
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