公开(公告)号：US20160247670A1

公开(公告)日：2016-08-25

申请号：US14430533

申请日：2014-09-05

申请人： BEIJING INSTITUTE OF TECHNOLOGY

发明人： WEI XU ,  MUYI HE ,  XIANG FANG

IPC分类号： H01J49/42 ,  H01J49/00

CPC分类号： H01J49/422 ,  G01N27/68 ,  H01J49/005 ,  H01J49/427

摘要： A method for analyzing ionic structure, including: applying a radio frequency electric field on an ion mass analyzer to cause sample ions to be excited to a motion amplitude, the motion amplitude at this moment being recorded as a primary motion amplitude; continuously feeding carrier gas into the ion mass analyzer and keeping a certain degree of vacuum in the ion mass analyzer, the sample ions being collided with the carrier gas and the motion amplitude being decreased gradually, and collecting a time domain signal of an image current generated by the sample ions during the process; and analyzing the time domain signal through a time-frequency analysis method and obtaining time-varying characteristic curves indicating corresponding relations between the motion frequencies of the ions having corresponding sizes and the collision cross sectional areas of the ions and the carrier gas, thus distinguishing among ions having different sizes.

摘要翻译： 一种用于分析离子结构的方法，包括：在离子质量分析仪上施加射频电场，使样品离子被激发到运动幅度，此时的运动幅度被记录为主运动幅度; 将离子质量分析仪中的载气连续送入离子质量分析仪，并在离子质量分析仪中保持一定的真空度，样品离子与载气相撞，运动幅度逐渐减小，并收集产生的图像电流的时域信号 在过程中由样品离子; 并通过时频分析方法对时域信号进行分析，得到时间特性曲线，表示具有相应尺寸的离子的运动频率与离子与载气的碰撞横截面积之间的对应关系，从而区别于 具有不同尺寸的离子