K-alpha emission from a laser generated electron beam interacting with aluminum targets
Abstract
We investigate the K α x-ray emissions from micron-sized aluminum targets irradiated and heated by a femtosecond intense laser pulse, like HERCULES (~ 30 fs, 810 nm Ti:sapphire, 1 mJ at 10 Hz). Two non-equilibrium models are coupled in this investigation: one in which time-dependent hot electron production is calculated using a PIC code and another in which the inner-shell, 1s, hole-state production rates are calculated using a non-equilibrium kinetic model. The FAC code is used to calculate collisional excitation and ionization cross sections, radiative decay rates and Auger rates needed in the time-dependent ionization calculations. The rate coefficients are calculated utilizing the PIC-code computed electron energy distributions from which K α emissions are obtained. Predictions as a diagnostic tool relevant to future experiments will be presented. Work supported by the NRL Base Program.
- Publication:
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APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- October 2013
- Bibcode:
- 2013APS..DPPNP8052P