| 摘要 |
<p>Via the shape of the photocathode (14) surface and the geometry and potential distribution of electrodes of the electron-optical system, an X-ray image intensifier tube is optimized for reduction of the transit time variance for photoelectrons from the photocathode surface to a photoelectron detector. The photoelectron detector, on which not an image need be formed in this case, has, for example a comparatively small entrance surface and is arranged in or near a cross-over of the photoelectrons.</p> |
