A high-energy, high-flux source of gamma-rays from all-optical non-linear Thomson scattering
A high-energy, high-flux source of gamma-rays from all-optical non-linear Thomson scattering
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DOI：
10.1016/j.nima.2016.03.077
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发表时间：
2016-09
影响因子：
1.4
通讯作者：
D. Corvan;M. Zepf;G. Sarri
中科院分区：
文献类型：
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作者：
D. Corvan;M. Zepf;G. Sarri
γ射线源是现代物理学目前最基本的实验工具之一。除了对基础研究有明显的好处外，超亮γ射线源还可以为扫描集装箱中的特殊核材料奠定基础，并为新型癌症治疗提供基础。然而，要证明这些应用是可行的，γ射线源必须变得紧凑，制造成本相对较低。近年来，激光技术的进步已经形成了高能电子光源的基石，高能电子光源已经用于在紧凑的尺度上产生同步辐射。利用第二束激光引起的散射，可以进一步提高产生的光子的能量和数量，前提是同步和紧凑的γ射线探测问题得到解决。本文报道了在研制全光学紧凑型非线性汤姆逊散射源方面所做的工作，包括同步和紧凑型γ射线探测的新方法。我们提出了产生多MeV（最大16-18 MeV）和超高亮度（在15 MeV时超过1020 photons s− 1 mm − 2 mrad −20.1% BW）γ射线束的证据。这些特性对于上述最重要的实际应用是有吸引力的。
γ-Ray sources are among the most fundamental experimental tools currently available to modern physics. As well as the obvious benefits to fundamental research, an ultra-bright source of γ-rays could form the foundation of scanning of shipping containers for special nuclear materials and provide the bases for new types of cancer therapy.However, for these applications to prove viable, γ-ray sources must become compact and relatively cheap to manufacture. In recent years, advances in laser technology have formed the cornerstone of optical sources of high energy electrons which already have been used to generate synchrotron radiation on a compact scale. Exploiting the scattering induced by a second laser, one can further enhance the energy and number of photons produced provided the problems of synchronisation and compact γ-ray detection are solved.Here, we report on the work that has been done in developing an all-optical and hence, compact non-linear Thomson scattering source, including the new methods of synchronisation and compact γ-ray detection. We present evidence of the generation of multi-MeV (maximum 16–18 MeV) and ultra-high brilliance (exceeding 1020photons s−1mm−2mrad−20.1% BW at 15 MeV) γ-ray beams. These characteristics are appealing for the paramount practical applications mentioned above.