Quantitative Untersuchung der Multi-Photon-Ionisation von Edelgas- und Metallatomen mit Freie-Elektronen-Laser-Strahlung in weichen Röntgengebieten

软 X 射线区域自由电子激光辐射对惰性气体和金属原子的多光子电离的定量研究

• 批准号: 108706939
• 负责人: Privatdozent Dr. Michael Martins
• 金额: --
• 依托单位: Abteilung 7 - Temperatur und Synchrotronstrahlung
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/108706939?language=en
• 关键词: Quantitative; Untersuchung; der; Multi; Photon

At the new Free-Electron Laser (FEL) FLASH (Free-Electron LASer in Hamburg) at DESY for soft X-rays of ultra-high intensity, photoionization of rare gases and free open-shell metal atoms will be studied by means of ion and electron spectroscopy. Of particular interest are non-linear effects such as sequential, direct, and resonant multi-photon ionization processes and strong-field phenomena as well, investigated at photon energies above atomic ionization thresholds. Our aim is a better understanding of the interaction between ionizing electromagnetic radiation of ultra-high intensity and matter in general and, in particular, the influence of electron correlation. Specific aspect of the experiments proposed is their quantitative character by absolute determination of photon number, spot size, pulse duration and, hence, FEL irradiance using a calibrated set-up. The measurements require a focused soft X-ray FEL beam to achieve irradiance values up to 1017 W cm-2. FLASH is currently the only place in the world where those experiments may be performed.

在DESY的新自由电子激光（FEL）闪光灯（汉堡的自由电子激光）中，将通过离子和电子光谱范围研究稀有气体的柔软X射线，稀有气体的光电离和自由开放式金属原子。特别感兴趣的是非线性效应，例如在原子电离阈值上方的光子能量下研究的顺序，直接和共振多光子电离过程和强场现象。我们的目的是更好地理解超高强度的电磁辐射与总体上，尤其是电子相关的影响之间的相互作用。提出的实验的特定方面是通过绝对确定光子数，点大小，脉冲持续时间，以及使用校准设置的FEL辐照度来定量特征。这些测量需要进行聚焦的软X射线FEL光束，以实现高达1017 W CM-2的辐照度值。 Flash目前是世界上唯一可以执行这些实验的地方。

项目成果

Multiple ionization of neon by soft x-rays at ultrahigh intensity

超高强度软 X 射线对氖气的多次电离

• DOI: 10.1088/0953-4075/46/16/164025
• 发表时间: 2013
• 期刊: Journal of Physics B: Atomic, Molecular and Optical Physics
• 作者: R. Guichard;M Richter;J.-M. Rost;U. Saalmann;A. A. Sorokin;K. Tiedtke
• 通讯作者: K. Tiedtke

Time-Dependent Multiphoton Ionization of Xenon in the Soft-X-Ray Regime

• DOI: 10.1103/physrevlett.112.213002
• 发表时间: 2014-05-30
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Gerken, N.;Klumpp, S.;Martins, M.
• 通讯作者: Martins, M.