Experimental characterization of a single-shot spectrometer for high-flux, GeV-scale gamma-ray beams
Experimental characterization of a single-shot spectrometer for high-flux, GeV-scale gamma-ray beams
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DOI：
10.1103/physrevresearch.5.043046
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发表时间：
2023-05
影响因子：
4.2
通讯作者：
N. Cavanagh;K. Fleck;M. Streeter;E. Gerstmayr;L. Dickson;C. Ballage;R. Cadas;L. Calvin;
中科院分区：
文献类型：
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作者：
N. Cavanagh;K. Fleck;M. Streeter;E. Gerstmayr;L. Dickson;C. Ballage;R. Cadas;L. Calvin;
我们报告了伽玛射线光谱仪的第一个实验特性，该光谱仪设计用于光谱分辨能量在GeV范围内的高通量光子光束。利用阿波罗激光装置在激光尾场加速电子束（最大能量为1.7 GeV，总电荷为207$\pm$62 pC）与1 mm厚钽靶相互作用过程中获得的轫致辐射源，对该光谱仪进行了实验表征。实验数据证实了进行单次测量的可能性，不需要积累，具有高信噪比。将结果缩放到多gev范围内的光子，表明有可能实现百分比级别的能量分辨率，例如，下一代强场量子电动力学实验所需要的。
We report on the first experimental characterisation of a gamma-ray spectrometer designed to spectrally resolve high-flux photon beams with energies in the GeV range. The spectrometer has been experimentally characterised using a bremsstrahlung source obtained at the Apollon laser facility during the interaction of laser-wakefield accelerated electron beams (maximum energy of 1.7 GeV and overall charge of 207$\pm$62 pC) with a 1 mm thick tantalum target. Experimental data confirms the possibility of performing single-shot measurements, without the need for accumulation, with a high signal to noise ratio. Scaling the results to photons in the multi-GeV range suggests the possibility of achieving percent-level energy resolution, as required, for instance, by the next generation of experiments in strong-field quantum electrodynamics.