High-precision diamond X-ray polarimeters for the detection of vacuum birefringence

用于真空双折射检测的高精度金刚石 X 射线旋光仪

• 批准号: 416700351
• 负责人: Professor Dr. Gerhard G. Paulus
• 金额: --
• 依托单位: Lehrstuhl Nichtlineare Optik
• 依托单位国家: 德国
• 项目类别: Research Units
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/416700351?language=en
• 关键词: precision; diamond; ray; polarimeters; detection

The birefringence of the vacuum induced by a strong electromagnetic field is a fundamental consequence of quantum electrodynamics. Its detection will, therefore, substantiate the fundaments of quantum electrodynamics in so far inaccessible parameter regimes and might have the potential for the discovery of hypothetical unknown particles. This effect, which scales with the intensity of the applied field and the reciprocal of the wavelength, has so far eluded direct experimental detection. However, the inauguration of a high-power laser at the European XFEL and advances in high-precision x-ray polarimetry in the past three years have set the stage for detecting vacuum birefringence. Therefore, the goal of this project is to achieve experimental proof of vacuum birefringence. At the same time, various aspects of precision X-ray polarimetry are to be further developed in such a way that the beam time required for the detection of vacuum birefringence at the XFEL is reduced to a few hours or, equivalently, the precision of the measurement of vacuum birefringence is optimized.

强电磁场引起的真空双折射现象是量子电动力学的一个基本结果。因此，它的探测将证实量子电动力学的基础，在迄今为止无法获得的参数范围内，并可能有发现假设未知粒子的潜力。这种效应与施加的电场强度和波长的倒数成比例，迄今为止还没有直接的实验检测到。然而，在过去的三年中，欧洲自由电子激光器的高功率激光器的启用和高精度x射线偏振法的进步为探测真空双折射奠定了基础。因此，本项目的目标是实现真空双折射的实验证明。同时，精密x射线偏振测量的各个方面都有待进一步发展，以便将在XFEL上检测真空双折射所需的光束时间减少到几个小时，或者等效地优化真空双折射测量的精度。