期刊
PHYSICAL REVIEW D
卷 104, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.104.013006
关键词
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资金
- Deutsche Forschungsgemeinschaft (DFG) [416607684, FOR2783/1]
- Ministry of Science and Higher Education of the Russian Federation [AAAA-A20-120090990006-0]
- Helmholtz Institute Jena
Researchers analyze the behavior of the phenomenon under the variation of experimental key-parameters and provide new analytical scalings, demonstrating that an appropriate choice of X-ray focus and pulse duration can significantly improve the signal. The results are essential for identifying the optimal parameters in a discovery experiment of vacuum birefringence at the high-intensity frontier.
We study vacuum birefringence and x-ray photon scattering in the head-on collision of x-ray free electron and high-intensity laser pulses. Resorting to analytical approximations for the numbers of attainable signal photons, we analyze the behavior of the phenomenon under the variation of various experimental key-parameters and provide new analytical scalings. Our optimized approximations allow for quantitatively accurate results on the one-percent level. We in particular demonstrate that an appropriate choice of the x-ray focus and pulse duration can significantly improve the signal for given laser parameters, using the experimental parameters to be available at the Helmholtz International Beamline for Extreme Fields at the European XFEL as example. Our results are essential for the identification of the optimal choice of parameters in a discovery experiment of vacuum birefringence at the high-intensity frontier.
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