For the microwave cavity resonance spectroscopy based non-destructive beam monitor for ionizing radiation, an addition-which adapts the approach to conditions where only little ionization takes place due to, e.g., small ionization cross sections, low gas pressures, and low photon fluxes-is presented and demonstrated. In this experiment, a magnetic field with a strength of 57 ± 1 mT was used to extend the lifetime of the afterglow of an extreme ultraviolet-induced plasma by a factor of ∼5. Magnetic trapping is expected to be most successful in preventing the decay of ephemeral free electrons created by low-energy photons. Good agreement has been found between the experimental results and the decay rates calculated based on the ambipolar and classical collision diffusion models.

中文翻译：

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用于电离辐射的磁场增强光束监测器

对于基于微波腔共振光谱的非破坏性电离辐射束监测器，增加了一种方法，该方法适用于由于例如小电离截面、低气压和低光子通量而只发生很少电离的条件 -被展示和展示。在该实验中，强度为 57±1 mT 的磁场用于将极紫外诱导等离子体的余辉寿命延长约 5 倍。预计磁俘获在防止由低能光子产生的短暂自由电子衰变方面最为成功。在实验结果和基于双极和经典碰撞扩散模型计算的衰减率之间发现了良好的一致性。