SBIR Phase I: Diamond Microtips Field Emission Electron Source

*9760843贾米森这个小型企业创新研究第一阶段项目是开发一种坚固的场发射电子源，使用钻石微尖作为标准热丝阴极的替代品。该项目将使用在硅模中生长的纳米晶体钻石微尖来生产直接替代许多科学仪器中使用的热丝阴极的金刚场发射源。该项目的第一阶段将测试金刚石微尖作为冷场电子发射源的适用性，以取代电子枪中的热丝。这一概念首先将通过用钻石微尖取代电子枪中的热丝阴极并获得初步操作参数(例如最大发射电流、发射电压等)来进行测试。为了那把枪。然后，这些信息将被用来设计热丝电子枪的直接替换尖端。由于金刚石微尖的有效功函数很低，大多数电子枪中的Wehnelt电源应该作为引出电源。简单的场发射替代热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、更小的光斑尺寸的电子枪。***

*** 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. ***