用于铝和钛等离子体的双通道高分辨率准单色X射线成像仪。

Two-channel high-resolution quasi-monochromatic X-ray imager for Al and Ti plasma.

作者信息

Do A, Briat M, Baton S D, Krumrey M, Lecherbourg L, Loupias B, Pérez F, Renaudin P, Rubbelynck C, Troussel Ph

机构信息

Commissariat à l'Énergie Atomique, DAM-Île de France, BP 12, 91680 Bruyères-les-Châtel, France.

LULI-CNRS, École Polytechnique, CEA: Université Paris-Saclay, UPMC Univ. Paris 06: Sorbonne Universités, F-91128 Palaiseau Cedex, France.

出版信息

Rev Sci Instrum. 2018 Nov;89(11):113702. doi: 10.1063/1.5042069.

DOI:10.1063/1.5042069

PMID:30501355

Abstract

High-resolution, high-sensitivity X-ray imaging is a real challenge in high-energy density plasma experiments. We present an improved design of the Fresnel ultra high-resolution imager instrument. Using an Ultra-High-Intensity (UHI) laser to generate hot and dense plasma in a small volume of an Al-Ti mixed target provides simultaneous imaging of both Al and Ti X-ray emission. Specifically, the Al He (or Ly) and the Ti He lines are imaged with a resolution of (2.7 ± 0.3) m and (5.5 ± 0.3) m, respectively. It features two transmission Fresnel phase zone plates fabricated on the same substrate, each associated with a multilayer mirror for spectral selection. Their spatial resolution has been measured on the PTB synchrotron radiation facility laboratory at BESSY II and on the EQUINOX laser facility. Results obtained on an UHI experiment highlight the difference of emission zone sizes between Al and Ti lines and the versatility of this instrument.

摘要

在高能量密度等离子体实验中，高分辨率、高灵敏度的X射线成像是一项真正的挑战。我们展示了一种改进的菲涅耳超高分辨率成像仪设计。使用超高强度（UHI）激光在一小体积的铝钛混合靶中产生热且致密的等离子体，可同时对铝和钛的X射线发射进行成像。具体而言，铝的氦（或Ly）线和钛的氦线成像分辨率分别为(2.7 ± 0.3) 米和(5.5 ± 0.3) 米。它的特点是在同一基板上制作了两个透射菲涅耳相位区板，每个都与一个用于光谱选择的多层镜相关联。它们的空间分辨率已在BESSY II的PTB同步辐射设施实验室和EQUINOX激光设施上进行了测量。在UHI实验中获得的结果突出了铝线和钛线发射区尺寸的差异以及该仪器的多功能性。