Proton deflectometry with in situ x-ray reference for absolute measurement of electromagnetic fields in high-energy-density plasmas.
Proton deflectometry with in situ x-ray reference for absolute measurement of electromagnetic fields in high-energy-density plasmas.
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带有原位 X 射线参考的质子偏转测量仪，用于绝对测量高能量密度等离子体中的电磁场。
DOI：
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发表时间：
2021
影响因子：
1.6
通讯作者：
A. Birkel
中科院分区：
文献类型：
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作者：
C. Johnson;S. Malko;W. Fox;D. Schaeffer;G. Fiksel;P. Adrian;G. Sutcliffe;A. Birkel
我们报告的质子偏转技术，使用网格和原位参考X射线网格图像精确测量高能量密度等离子体中的磁场。D3He聚变内爆提供了质子和X射线的亮点源，这些亮点源被网格分成细光束。质子在通过感兴趣的等离子体区域传播时经历偏转，而X射线沿着沿着直线传播。因此，X射线图像提供零偏转参考图像。线集成磁场推断从偏转（质子）和参考（X射线）图像之间的子束的移位。我们开发了一个系统，这些数据的分析，包括自动算法，找到小束的位置，并计算其偏转的参考图像。在OMEGA进行的测量真空中的非均匀磁场的实验中验证了该技术，然后将其应用于观察膨胀等离子体羽流与磁场的相互作用。
We report a technique of proton deflectometry that uses a grid and an in situ reference x-ray grid image for precise measurements of magnetic fields in high-energy-density plasmas. A D3He fusion implosion provides a bright point source of both protons and x-rays, which is split into beamlets by a grid. The protons undergo deflections as they propagate through the plasma region of interest, whereas the x-rays travel along straight lines. The x-ray image, therefore, provides a zero-deflection reference image. The line-integrated magnetic fields are inferred from the shifts of beamlets between the deflected (proton) and reference (x-ray) images. We developed a system for analysis of these data, including automatic algorithms to find beamlet locations and to calculate their deflections from the reference image. The technique is verified in an experiment performed at OMEGA to measure a nonuniform magnetic field in vacuum and then applied to observe the interaction of an expanding plasma plume with the magnetic field.
影响因子：
2.5
作者：
Bott, A. F. A.;Graziani, C.;Schekochihin, A. A.
通讯作者：
Schekochihin, A. A.