Synchrotron radiation observed from runaway electrons (REs) in tokamaks depends upon the position and size of the RE beam, the RE energy and pitch distributions, as well as the location of the observer. We show that experimental synchrotron images of a vertically moving runaway electron beam sweeping past the detector in the TCV tokamak agree well with predictions from the synthetic synchrotron diagnostic Soft. This experimental validation lends confidence to the theory underlying the synthetic diagnostics which are used for benchmarking theoretical models of and probing runaway dynamics. We present a comparison of synchrotron measurements in TCV with predictions of kinetic theory for runaway dynamics in uniform magnetic fields. We find that to explain the detected synchrotron emission, significant non-collisional pitch angle scattering as well as radial transport of REs would be needed. Such effects could be caused by the presence of magnetic perturbations, which should be further investigated in future TCV experiments.

中文翻译：

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垂直平移等离子体中的失控电子同步辐射

从托卡马克中的失控电子 (RE) 观察到的同步加速器辐射取决于 RE 束的位置和大小、RE 能量和间距分布，以及观察者的位置。我们表明，垂直移动的失控电子束扫过 TCV 托卡马克探测器的实验同步加速器图像与合成同步加速器诊断软件的预测非常吻合。这种实验验证为合成诊断的理论提供了信心，这些理论用于对失控动力学的理论模型进行基准测试和探测。我们将 TCV 中的同步加速器测量值与均匀磁场中失控动力学的动力学理论预测进行了比较。我们发现为了解释检测到的同步辐射，将需要显着的非碰撞俯仰角散射以及 RE 的径向传输。这种影响可能是由磁扰动引起的，这应该在未来的 TCV 实验中进一步研究。