Development of isotope microscope for proto-solar system survey

本研究开发了一种新型的带电粒子固态面探测器。这种被称为AMI的探测器是基于半导体或硅衬底理论的。在半导体器件上沉积了用于轰击能量从eV到keV的离子和电子的像素电极，并研制了一种Prote型同位素显微镜模型。同位素显微镜是将AMI探测器与柱状二次离子质谱仪相结合的系统，用于固体样品的同位素成像研究。图像的空间分辨率达到1微米。图像大小为512(高)x 250(V)像素。一个像素的动态范围是四个数量级。成像区域由质谱仪的变焦系统控制。变焦范围在25到400微米之间。我们计划获得陨石物质的同位素比值图像。同位素图像可能会清楚地揭示太阳系和行星的起源和演化。AMI探测器和同位素显微镜也是材料科学和高能物理的有效工具。

A novel solid-state area detector for charged particles has been developed in this study. The detector called AMI is based on semiconduct or theory for Si substrate. Pixel electrodes for bombardment of ions and electrons with the energy from eV to keV were deposited on the semiconductor device A prote-type model of isotope microscope has also been developed. The isotope microscope is combination system of the AMI detector with stigmatic secondary ion mass spectrometer.The isotope microscope applied to the study of isotope imaging of solid sample. Spatial resolution of the image achieved to 1 mum. The image size is 512 (H) x 250 (V) pixels. Dynamic range of one pixel is four orders of magnitude. The imaging area is controlled by zooming system of the mass spectrometer. The zooming area is over the range of 25 to 400 mum. We are planning to get isotope ratio image of meteoritic materials. The isotope image may make clear the origin and evolution of the solar system and planets. The AMI detector and isotope microscope are also effective tool for material sciences and high energy physics.