Lanthanum Hexaboride Electron Beam Sources

六硼化镧电子束源

• 批准号: 9215150
• 负责人: Craig Scott
• 金额: $ 1.8万
• 依托单位: Morgan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-02-15 至 1995-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9215150&HistoricalAwards=false
• 关键词: Lanthanum; Hexaboride; Electron; Beam; Sources

The objective of this research is for the PI to strengthen skills related to proposal preparation for NSF. A preliminary investigation of multi-layered pulsed photocathodes will be the scientific thrust of the proposals written during the planning grant period. Laser driven photoelectron sources can be pulsed at very high rates and are capable of simultaneously achieving high brightness, long lifetime, and resistance to poor vacuum conditions. Lanthanum Hexaboride is a low work function material that can be used to make efficient photoemitters. At present, most of the work on these photoemitters has been centered on the large area, bulk, surface photoemission properties. The details of the photoemission process for multi-layered, transmission mode Lanthanum Hexaboride photocathodes and photo-assisted microelectronic field emission cathodes will be investigated as a long term goal. The long term activities of proposed investigation involves fabricating and measuring the electrical and material properties of a variety of vertical and lateral cathode structures.

这项研究的目的是为了加强与国家科学基金提案准备相关的技能。对多层脉冲光电阴极的初步调查将是计划拨款期间所写提案的科学重点。激光驱动的光电子源可以以非常高的速率脉冲，并且能够同时实现高亮度，长寿命和对差真空条件的抵抗力。六硼化镧是一种低功函数材料，可用于制造高效的光发射器。目前，对这些发光材料的研究大多集中在大面积、体积、表面发光特性上。多层传输模式六硼化镧光电阴极和光辅助微电子场发射阴极的光电过程细节将作为一个长期目标进行研究。拟议研究的长期活动包括制造和测量各种垂直和横向阴极结构的电学和材料特性。