SBIR Phase I: Diamond Microtips Field Emission Electron Source

* 9760843 Jamison 这个小型企业创新研究第一阶段项目是开发一个强大的场发射电子源，使用金刚石微尖作为标准热灯丝阴极的替代品。 该项目将使用在硅模具中生长的纳米金刚石微尖来生产金刚石场发射源，这些场发射源可以直接替代许多科学仪器中使用的热灯丝阴极。 该项目的第一阶段将测试金刚石微尖作为冷场发射电子源的适用性，以取代电子枪中的热灯丝。 首先将通过用金刚石微尖代替电子枪中的热灯丝阴极并获得初步的操作参数（例如最大发射电流、发射电压等）来测试该概念。为了枪 这些信息将被用来设计一个直接更换的热灯丝电子枪的尖端。 由于金刚石微尖具有非常低的有效功函数，大多数电子枪中的Wehnelt电源应用作提取器电源。 简单的场致发射取代热灯丝电子枪的预期好处有很多，它们包括用于科学应用的高亮度“防烧毁”、低能量扩散电子枪，以及用于高分辨率电视管的坚固的、较小光斑尺寸的电子枪。 ***

*** 9760843 Jamison This Small Business Innovation Research Phase I project is to develop a robust field emission electron source using diamond microtips as a replacement for standard hot filament cathodes. The project will use nanocrystaline diamond microtips grown in a silicon mold to produce diamond field emission sources that are direct replacements for hot filament cathodes used in many scientific instruments. Phase I of this project will test the applicability of diamond microtips for use as a cold field emission source of electrons to replace hot filaments in electron guns. The concept will first be tested by replacing the hot filament cathode in an electron gun by the diamond microtip and obtaining preliminary operating parameters (e.g. maximum emission current, emission voltage, etc.) for the gun. This information will then be used to design a direct replacement tip for hot filament electron guns. Because diamond microtips have a very low effective work function, the Wehnelt power supply in most electron guns should serve as the extractor supply. The anticipated benefits of simple field emission replacement for a hot filament electron gun are many, They range a high brightness "burn-out-proof", low energy spread electron gun for scientific applications, to robust, smaller spot size electron guns for high resolution TV tubes. ***