Magnifying lens for 800 MeV proton radiography
Magnifying lens for 800 MeV proton radiography
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DOI：
10.1063/1.3652974
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发表时间：
2011-10-01
影响因子：
1.6
通讯作者：
Thompson, T. N.
中科院分区：
文献类型：
--
作者：
Merrill, F. E.;Campos, E.;Thompson, T. N.
本文介绍了洛斯阿拉莫斯国家实验室 (LANL) 设计、建造和调试的用于 800 MeV 闪光质子射线照相的放大磁透镜系统的设计和性能。 LANL 开发了闪光质子射线照相技术，通过分析质子射线照相的时间序列来研究动态负载条件下的材料特性。这一不断增长的实验计划的要求导致需要改进空间射线照相分辨率。为了满足这些需求，开发了一种由四个永磁四极杆组成的新型磁透镜系统。这种新的镜头系统旨在减少二阶色差（800 MeV 质子射线照相中图像模糊的主要来源），并放大图像以减少探测器和相机系统造成的模糊。最近投入使用的透镜系统按设计运行，放射线照相分辨率提高了近三倍。 (C) 2011 年美国物理研究所。 [号码：10.1063/1.3652974]
This article describes the design and performance of a magnifying magnetic-lens system designed, built, and commissioned at the Los Alamos National Laboratory (LANL) for 800 MeV flash proton radiography. The technique of flash proton radiography has been developed at LANL to study material properties under dynamic loading conditions through the analysis of time sequences of proton radiographs. The requirements of this growing experimental program have resulted in the need for improvements in spatial radiographic resolution. To meet these needs, a new magnetic lens system, consisting of four permanent magnet quadrupoles, has been developed. This new lens system was designed to reduce the second order chromatic aberrations, the dominant source of image blur in 800 MeV proton radiography, as well as magnifying the image to reduce the blur contribution from the detector and camera systems. The recently commissioned lens system performed as designed, providing nearly a factor of three improvement in radiographic resolution. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3652974]