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- W3159360111 abstract "We investigate by molecular dynamics simulations (Torfason et al., 2015; 2016) a beam of electrons released via field emission from a planar cathode surface of 1 μ m <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> with an inhomogeneous two-level work function, Φ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>low</sub> and Φ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>high</sub> . A rectangular grid, where each cell can have one out of two values of the work function, is used as a model. The number of cells in the grid ranges from 6 × 6 to 96×96. We compare a periodic checkerboard arrangement with disordered distributions of patches. We perform multiple simulations and randomize the pattern each time. We study the beam behavior by calculating the position and velocity of each electron, r.m.s. emittance, and the brightness of the electron beam. The emittance increases while brightness decreases, with the mean distance between patches with Φ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>low</sub> when they are in minority, and they switch the behavior versus the mean distance between patches with Φ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>high</sub> when these patches are in minority, respectively. The Coulomb interaction between all particles is fully included in our simulations." @default.
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- W3159360111 date "2021-05-01" @default.
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- W3159360111 title "Dynamics of a Field Emitted Beam From a Microscopic Inhomogeneous Cathode" @default.
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- W3159360111 doi "https://doi.org/10.1109/ted.2021.3063210" @default.
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