A microfocus X-ray tube based on a microstructured X-ray target

被引：23

作者：

Ihsan, Aamir ^{[1
]}

Heo, Sung Hwan ^{[1
]}

Cho, Sung Oh ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Taejon 305701, South Korea

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2009年 / 267卷 / 21-22期

关键词：

X-ray tube; X-ray target; Microstructure; Microfocus; MONTE-CARLO-SIMULATION; W/AL-FILM TARGETS; FOCAL SPOT SIZE; COMPUTED-TOMOGRAPHY; SPATIAL-DISTRIBUTION; RESOLUTION; TECHNOLOGY;

D O I：

10.1016/j.nimb.2009.08.012

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We present a novel concept to develop a microfocus X-ray tube based on a microstructured X-ray target that is irradiated with a nonfocused electron beam. X-ray emissions from the microstructured targets with various morphologies were studied using Monte-Carlo simulation code MCNP5. The calculations revealed that the microstructured targets are quite capable of minimizing the effective X-ray spot size compared with those of conventional transmission-type X-ray targets. Based on the simulation results of X-ray brightness, optimum geometric parameters were derived for the microstructured targets with different morphologies. Moreover, the stability of the microstructured target against heat loads delivered by an electron beam was also investigated under both the continuous and pulsed operation modes. From the analysis, the limitations of the maximum allowable electron beam currents for the stable operation of the X-ray targets are presented. The combination of the microstructured targets and nonfocused electron beam allows the miniaturization of a microfocus X-ray tube by eliminating the needs for massive and complex focusing devices. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3566 / 3573

页数：8

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