Dual-Gate Electron Emission Structure with Nanotube-on-Emitter for X-Ray Generation

概要

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Films of carbon nanotubes (CNTs) have recently being shown to be efficient field emission electron sources. In this paper, we propose and model a dual-gate structure having a nanotube-on-emitter structure as a cold electron source suitable for X-ray generation and other applications. The electrons are emitted from the confined region of the nanotube apex, the electron beam angular aperture being controlled by the focusing gate electrode. The electric field distribution in the structure has been computed using the commercial software package Simion 3D 7.0. The CNT emission cunent has been computed using a recently developed model that takes into account the low dimensionality of the CNT electronic system. The device characteristics have been calculated as a function of the device geometry and its functional parameters.
社団法人応用物理学会の論文
2002-09-15