Carbon nanotube based microfocus field emission x-ray source for microcomputed tomography

被引：143

作者：

Liu, Zejian ^{[1
]}

Yang, Guang

Lee, Yueh Z.

Bordelon, David

Lu, Jianping

Zhou, Otto

机构：

[1] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

[2] Univ N Carolina, Sch Med, Chapel Hill, NC 27599 USA

[3] Univ N Carolina, Curriculum Appl & Mat Sci, Chapel Hill, NC 27599 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 10期

关键词：

D O I：

10.1063/1.2345829

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Microcomputed tomography is now widely used for in vivo small animal imaging for cancer studies. Achieving high imaging quality of live objects requires the x-ray source to have both high spatial and temporal resolutions. Preliminary studies have shown that carbon nanotube (CNT) based field emission x-ray source has significant intrinsic advantages over the conventional thermionic x-ray tube including better temporal resolution and programmability. Here we report the design and characterization of a CNT based field emission x-ray source that also affords a high spatial resolution. The device uses modified asymmetric Einzel lenses for electron focusing and an elliptical shaped CNT cathode patterned by photolithography. Stable and small isotropic x-ray focal spot sizes were obtained. (c) 2006 American Institute of Physics.

引用

页数：3

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