| 摘要 |
A charged particle energy analyser (10) includes inner and outer cylindrically symmetric electrodes (11,12) arranged coaxially on a longitudinal axis (z-z) of the analyser. A position-sensitive detector (17) has a particle-receiving detection surface located off-axis, at a radial spacing from the longitudinal axis (z-z) less than the radius of the inner electrode (11). Methods of operating the charged particle energy analyser in first and second order focussing modes are described. A position-sensitive detector (17) suitable for use in "parallel analysers" is described (Figures 7 and 8). |
