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一种带可变增益SIT(硅增强靶)靶的X射线象增强管已研制成功.X射线SIT管具有的增益控制范围是300～1,低噪声,极限分辨率是1500电视线/直径,象质可与光学耦合X射线增强器-视象管结合所获得的象质相比美.利用X射线SIT管的可变内增益能制成这样一种电子X射线照像成象系统,它既可用于低曝光率X射线荧光检查,又可用作高曝光率短持续时间的X射线荧光照像记录.本文介绍了X射线SIT靶的设计构思,并且对靶噪声做了详细分析.本文还概述了6英寸和9英寸输入直径X射线SIT管的实测特性.
An X-ray image intensifier tube with a variable gain SIT (silicon enhanced target) target has been developed. The X-ray SIT tube has a gain control range of 300 to 1 with low noise and a limit resolution of 1500 TV lines / The quality of the image is comparable to that obtained with the optically coupled X-ray intensifier-image tube combination. With the variable internal gain of the X-ray SIT tube, an electronic X-ray imaging system can be made both Can be used for low-rate X-ray fluorescence examination, but also can be used as X-ray fluorescence imaging record of high exposure rate of short duration.This paper introduces the design concept of X-ray SIT target, and made a detailed analysis of target noise. An overview of the measured characteristics of 6-inch and 9-inch input diameter X-ray SIT tubes.