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    • 1. 发明授权
    • Angular resolved spectrometer
    • 角分辨光谱仪
    • US4758722A
    • 1988-07-19
    • US615445
    • 1988-05-30
    • Robert C. G. LeckeyJohn D. Riley
    • Robert C. G. LeckeyJohn D. Riley
    • H01J49/48
    • H01J49/48
    • An angular resolved spectrometer is provided which is capable of analyzing the energy of charged particles from an analysis source and simultaneouosly obtaining spectra with a resolution of .+-.1.0.degree. for a range of angles of emission up to an order of 340.degree. in a single selected plane of emission. Concentric toroidal electrode sectors move charged particles with emission angles -.alpha..sub.o .ltoreq..alpha..ltoreq.+.alpha..sub.o, any .beta. angle, and a chosen energy, entering at a path midway of the inlet end of an open-ended annular toroidal-contoured passageway formed by said concentric toroidal sectors and between which an electrical field is arranged in operation to be established, so that charged particles with said energy and angles (.alpha.,.beta.) will be refocused such that those charged particles with differing .alpha. angles are strongly refocused but those charged particles with differing .beta. angles are only weakly refocused, thereby to retain the required .beta. angular information at the .alpha. focus plane and provide a focus of charged particles into ring form. A charged particles position-sensitive detector then registers the focus of charged particles in ring form and generates signal pulses determined by the position of arrival of the charged particles on the detector. Means which measures differences in arrival times of the signal pulses is preferably employed to determine the angle .beta. at which the charged particles were emitted from said analysis source.
    • 提供了一种角度分辨光谱仪,其能够分析来自分析源的带电粒子的能量,并且在一个单一的方法中同时获得分辨率为+/- 1.0°的光谱,其发射角范围达到340° 选择排放平面。 同心环形电极部分移动具有发射角的带电粒子 - αoα/α+αo,任何β角以及所选择的能量,在开口环形环形电极的入口端的中途进入, 由所述同心环形扇区形成的轮廓通道,并且在操作中设置电场以建立电场,使得具有所述能量和角度(α,β)的带电粒子将被重新聚焦,使得具有不同α角的带电粒子是强的 重新聚焦,但是具有不同β角的带电粒子仅被弱重新聚焦,从而在α聚焦平面处保留所需的β角度信息,并将带电粒子的焦点提供给环形。 带电粒子位置敏感检测器然后以环形形式记录带电粒子的焦点,并产生由带电粒子到达检测器的位置确定的信号脉冲。 测量信号脉冲到达时间差异的方法优选用于确定从所述分析源发射带电粒子的角度β。