| 摘要 |
<p>The present invention relates to an apparatus (9) for detection of radiation comprising a photocathode (18) adapted to release photoelectrons in dependence on incident radiation; a radiation entrance (33) arranged such that a beam (1) of radiation can be entered into the apparatus through said radiation entrance and can impinge on said photocathode at grazing incidence; an electron avalanche amplifier (21, 27, 29, 53) adapted to avalanche amplify photoelectrons released from said photocathode; and a readout arrangement (27, 29) adapted to detect avalanche amplified electrons from said amplifier. The invention further relates to a corresponding method for detection of ionizing radiation and to an arrangement for use in planar beam radiography comprising the detector apparatus.</p> |
