【摘要】 本文报导了我们设计和建立的高分辫多功能原子碰撞实验装置,介绍了装置的结构、功能、技术指标。并描述了我们研制的国内第二台大型静电分析器、三种可调光阑,X及Y方向静电偏转器、靶冷却屏蔽装置、活动靶架、靶室、20°磁分析器、测量室等设备的结构、性能,以及微机“在线”高压控制和四参数核谱数据获取系统。装置总的能量分辨经实测己达±1.8×10^-4利用此装置开展了快分子离子与固体相互作用的研究。更多还原

【Abstract】 A set of high-resolution multi-performance experimental arrangement for study atomic collision physics has been built at the institute of nuclear science and technology of Sichuan University. This arrangement include ion neutralization chamber, two 20° magnetic analyzers, collimater, target chamber system (inc.electron gun, beam monitors and chopper, removable target holder), pre-and post-deflectors, 90° electrostatic analyzer, measuring chambers, viewers, adjustable slits, vacuum system, detectors and on-line Apple Ⅱ+ microcomputer high voltage control on the electrostatic analyzer and automatic four-parameter acquisition, etc. The structure, performance and specication of the experimental set up is described.magnetically analyzed ion beam from ours 2.5MV Van de Graaff accelerator are collimated to have a maximum angular divergence of±0.1 mrad and a spot size of 0.03×0.03-0.2×0.2mm2 at the target position. The pre-deflector are used so as to avoid detecting particles that arise from dissoc- iation of the primary beam along the about seven meter flight path between the 90° magnetic analyzer and the target. A high-resolution 90° electrostatic analyzer with a mean radius of 800±0.01mm and a separation of plates of 8±0.01mm is located Several mater downstream from the target. Distribution in energy and angle are measured for particles emerging from the target by varying the voltages on the post-deflector in conjunction with that on the electrostatic analyzer. The total relative energy resolution is ±1.8×10-4. The overall anagular resolution is 1×10~-4 rad. The beam line pressure is 2-7×10~-7 Torr.更多还原