ATMOSPHERIC PROTON MICROPROBE FOR TRACE ELEMENT ANALYSIS

用于痕量元素分析的大气质子探针

• 批准号: 3498756
• 负责人: RAYMOND P BOISSEAU
• 金额: $ 5万
• 依托单位: PYRAMID TECHNICAL CONSULTANTS, INC.
• 依托单位国家: 美国
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-15 至 1992-07-14
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3498756
• 关键词: X ray; analytical method; atmosphere /weather; biomedical equipment development; organic chemicals; personal computers; proton beam; trace elements

DESCRIPTION (Adapted from Applicant's Abstract):The development of an Atmospheric Scanning Proton Microprobe (ASPM) for elemental analysis of organic specimens is proposed. The instrument will be capable of mapping elemental distributions in concentrations as low as 1 ppm. The ability to bring high energy protons into air will allow the analysis of hydrated organic specimens with little or no special preparation, avoiding distortion of the elemental distributions. The ASPM uses Proton Induced X- Ray Emission (PIXE), a general analysis technique for bulk specimens. The use of a collimated proton beam, scanning stage and vacuum window will provide the capability to analyze the specimen in air with moderate spatial resolution (>10 microns). Phase I research will be used to instrument an existing test beamline. A Personal Computer based acquisition and control system will be developed for area mapping and display. The resulting system will be used to evaluate the use of low energy (.5-2 Mev) proton beams for the analysis of organic specimens, with the goal of identifying a minimum energy accelerator suitable for development into a self-contained analytical tool. Phase II will be used to produce the prototype of a dedicated system including accelerator, beamline, and control system.

描述（改编自申请人摘要）：一个