论文标题
从微观不均匀阴极发射光束的场的动力学
Dynamics of a Field Emitted Beam from a Microscopic Inhomogeneous Cathode
论文作者
论文摘要
我们通过分子动力学模拟[ARXIV：1412.4537 [Physics.plasm-PH]，Arxiv：1608.06789 [Physics.plasm-PH]]一张通过现场发射从平面阴极表面释放的电子束，该电子光束，该表面具有1 $ {\rmμmmm}^2 $ unhomogens unhomogens $ n-Onhomogens $ n-Onhomogens $ n-Onevelions low} $和$ ϕ _ {\ rm高} $。一个矩形网格，每个单元格可以用作工作函数的两个值中的一个，用作模型。网格中的细胞数量为6x6至96x96。我们将定期棋盘格的布置与斑块分布分布进行比较。我们每次执行多个模拟并随机将模式随机化。我们通过计算每个电子的位置和速度来研究光束行为，R.M.S。发射率和电子束的亮度。当亮度降低时，发射率会增加，当它们属于少数族裔时，贴片之间的平均距离，它们分别在少数派时，它们切换了行为与$ ϕ _ {\ rm high} $的平均距离。所有颗粒之间的库仑相互作用完全包括在我们的模拟中。
We investigate by molecular dynamics simulations [arXiv:1412.4537 [physics.plasm-ph], arXiv:1608.06789 [physics.plasm-ph]] a beam of electrons released via field emission from a planar cathode surface of 1 ${\rm μm}^2$ with an inhomogeneous two-level work function, $ϕ_{\rm low}$ and $ϕ_{\rm high}$. 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 6x6 to 96x96. 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 $ϕ_{\rm low}$ when they are in minority, and they switch the behavior vs. the mean distance between patches with $ϕ_{\rm high}$ when these patches are in minority, respectively. The Coulomb interaction between all particles is fully included in our simulations.
