Transparent target for ultrafast electron beam tomography
Transparent target for ultrafast electron beam tomography
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DOI：
10.1016/j.nima.2011.01.075
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发表时间：
2011-04-11
影响因子：
1.4
通讯作者：
Stuerzel, T.
中科院分区：
文献类型：
--
作者：
Hampel, U.;Barthel, F.;Stuerzel, T.
在电子束层析成像中，旋转的X射线源是通过高功率电子束穿过空间固定的圆形金属目标的电磁扫描而产生的。通过研究对象的X射线由环形快速X射线探测器阵列记录。与这种扫描原理相关的一个基本问题是X射线焦点路径和探测器的角度重叠，这是重建图像所必需的。因此，X射线产生靶和探测器阵列通常以一定的轴向位移布置。这种位移可能会产生图像伪影，因为X射线不再局限于横切面。我们提出了一种新型的透明X射线靶，完全解决了这一问题。新的靶材概念已经在热行为和电子束阻力方面进行了实际测试。在一台实验层析成像装置中得到了成功的应用。(C)2011爱思唯尔B.V.保留所有权利。
In electron beam tomography a rotating X-ray source is generated by electromagnetic scanning of a high-power electron beam across a spatially fixed circular metal target. The X-rays passing the object of investigation are registered by a circular fast X-ray detector array. A basic problem associated with this scanning principle is the angular overlap of the X-ray focal spot path and the detector, which is required for image reconstruction. Therefore, the X-ray production target and the detector array are commonly arranged with some axial displacement. This displacement may produce image artifacts because X-rays are not longer confined to a transversal plane. We propose a novel transparent X-ray target, which fully solves this problem. The new target concept has been practically tested with respect to thermal behavior and electron beam resistance. Its successful application in an experimental tomography setup is demonstrated. (C) 2011 Elsevier B.V. All rights reserved.