Laser-PIXE using laser-accelerated proton beams
Laser-PIXE using laser-accelerated proton beams
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DOI：
10.1038/s41598-019-42997-y
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发表时间：
2019-05-02
影响因子：
4.6
通讯作者：
Antici, P.
中科院分区：
文献类型：
--
作者：
Barberio, M.;Antici, P.
激光驱动的质子加速是一个越来越受关注的领域，特别是因为它的众多应用，包括在材料科学领域。这些基于激光的粒子源的一个好处是它们相对紧凑的潜力，以及与传统的基于射频的质子源不同的一些特性。这些特征包括，例如，更高的亮度，更短的持续时间，和更大的能量扩散。最近，在文化遗产领域已经提出使用激光加速质子作为粒子诱导x射线发射诊断（“激光pixe”）的替代来源，这是一种特殊的离子束分析（IBA）技术，可以精确分析材料块的化学成分。本文研究了利用激光加速质子束实现激光-光子交换的可行性。我们专注于文化遗产领域特别感兴趣的材料。通过对Geant4的模拟，我们发现激光粒子加速器可以分析比传统粒子加速器更大的体积，这得益于激光加速质子的巨大能量扩散。此外，对于特定材料，大能量分布允许研究多层材料，与传统的PIXE技术相比具有优势。
Laser-driven proton acceleration is a field of growing interest, in particular for its numerous applications, including in the field of materials science. A benefit of these laser-based particle sources is their potential for a relative compactness in addition to some characteristics at the source that differ from those of conventional, radio-frequency based proton sources. These features include, e.g., a higher brilliance, a shorter duration, and a larger energy spread. Recently, the use of laser-accelerated protons has been proposed in the field of Cultural Heritage, as alternative source for the Particle Induced X-ray Emission diagnostic ("laser-PIXE"), a particular ion beam analysis (IBA) technique that allows to precisely analyse the chemical composition of the material bulk. In this paper we study the feasibility of the laser-PIXE using laser-accelerated proton beams. We focus on materials specifically of interest for the Cultural Heritage domain. Using Geant4 simulations, we show that the laser-PIXE allows analysing a larger volume than conventional PIXE, profiting from the large energy spread of laser-accelerated protons. Furthermore, for specific materials, the large energy spread allows investigating multilayer materials, providing an advantage compared to conventional PIXE technologies.