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arXiv 1906.03152physics.ins-det
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高能光电子能谱电子飞行时间分析仪中的空间电荷效应

Space-Charge effect in electron time-of-flight analyzer for high-energy photoemission spectroscopy

G. Greco, A. Verna, F. Offi, G. Stefani

摘要:

由于在吸收单个光子脉冲之后许多电子的瞬时发射,空间电荷效应导致光电子能谱中的失真。本文用两种计算方法模拟了高能光脉冲产生的单能和双能电子云在自由飞行过程中的膨胀,并对两种方法的结果进行了比较。测试了一种广泛使用的工具,如SIMION(R),在预测空间电荷引起的能量畸变方面的准确性,并验证了其结果的可靠性。最后,我们使用SIMION(R)来考虑空间电荷的影响,在模拟简单的光电发射实验与飞行时间分析仪。

英文摘要:

The space-charge effect, due to the instantaneous emission of many electrons after the absorption of a single photons pulse, causes distortion in the photoelectron energy spectrum. Two calculation methods have been applied to simulate the expansion during a free flight of clouds of mono- and bi-energetic electrons generated by a high energy pulse of light and their results have been compared. The accuracy of a widely used tool, such as SIMION(R), in predicting the energy distortion caused by the space-charge has been tested and the reliability of its results is verified. Finally we used SIMION(R) to take into account the space-charge effects in the simulation of simple photoemission experiments with a time-of-flight analyzer.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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