Proposed for presentation at the Photocathode Physics for Photoinjector Workshop held November 10-12, 2021 in Menlo Park, CA.最新文献

英文中文

Transverse properties of the electron beam emitted from a diamond nanotip. 从金刚石纳米尖端发射的电子束的横向特性。

Proposed for presentation at the Photocathode Physics for Photoinjector Workshop held November 10-12, 2021 in Menlo Park, CA.

Pub Date : 2021-11-01 DOI: 10.2172/1897148

Sneha Banerjee, A. Piryatinski, Tom M. Kwan, P. Zhang, Chengkun Huang

This paper reports the results of divergence studies for an electron beam emitted from a single diamond pyramid in a sparse diamond field emitter array (DFEA) cathode. At Los Alamos National Laboratory, we fabricate and study DFEAs. DFEA cathodes are arrays of micrometer scale diamond pyramids with nanometer scale tips. A single diamond pyramid produces currents as high as 10 μA within a small volume. DFEA cathodes are predicted to be a good beam source for compact dielectric laser accelerators. DFEAs are fabricated by a mold transfer process and produce electrons by the process of field emission when a high electric field is applied to the cathode. For the electron beam divergence experiment, we have designed and assembled a test stand consisting of a DFEA cathode, a mesh anode, and a screen. We measured current and the size of the beam on the screen as functions of the distance between the cathode and the anode, the size of a pyramid’s base, and applied voltage on the cathode. We also simulated the electron beam dynamics with Computer Simulation nano-tip:

本文报道了稀疏金刚石场发射极阵列(DFEA)阴极中单个金刚石金字塔发射的电子束散度的研究结果。在洛斯阿拉莫斯国家实验室，我们制造和研究DFEAs。DFEA阴极是由微米级金刚石金字塔和纳米级尖端组成的阵列。单个钻石金字塔在很小的体积内产生高达10 μA的电流。预测DFEA阴极是紧凑介质激光加速器的良好光束源。DFEAs是通过模转移工艺制备的，当阴极上施加高电场时，通过场发射过程产生电子。为了进行电子束发散实验，我们设计并组装了一个由DFEA阴极、网状阳极和屏幕组成的试验台。我们测量了电流和屏幕上光束的大小，作为阴极和阳极之间距离的函数，金字塔底部的大小，以及阴极上施加的电压。我们还利用计算机模拟纳米尖端模拟了电子束动力学:

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Proposed for presentation at the Photocathode Physics for Photoinjector Workshop held November 10-12, 2021 in Menlo Park, CA.

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