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6 May 2009 Radiation damage within atomic clusters irradiated with intense VUV radiation
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Abstract
Kinetic Boltzmann equations are used to model the ionization and expansion dynamics of xenon clusters irradiated with short, intense VUV pulses from free-electron-laser (FEL). This unified model includes all of the predominant interactions that contribute to the cluster dynamics induced by this radiation. The dependence of the evolution dynamics on cluster size and pulse fluence is investigated. It is found that the highly charged ions observed in the experiments are mainly due to Coulomb explosion of the outer shell of the cluster while ions formed in the interior of the cluster predominantly recombine with plasma electrons. As a result, a large fraction of neutral atoms is formed within the core, the proportion depending on the cluster size. The predictions of ion charge distribution, average ion charge and average energy absorbed per ion made with our model are found to be in good agreement with the experimental data. To our knowledge, our model is the first and only one that gives a full and quantitatively accurate description of all of the experimental data collected from irradiated atomic clusters at 100 nm photon wavelength.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
B. Ziaja, H. Wabnitz, F. Wang, E. Weckert, and T. Möller "Radiation damage within atomic clusters irradiated with intense VUV radiation", Proc. SPIE 7361, Damage to VUV, EUV, and X-Ray Optics II, 73610F (6 May 2009); https://doi.org/10.1117/12.821883
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