1. Silicon x-ray backlighter improvement by targets with spike-like microstructures
- Author
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Tina Ebert, Steffen Sander, Christian Stoeckl, Wolfgang Theobald, Sean P. Regan, and Markus Roth
- Subjects
Physics ,QC1-999 - Abstract
In order to accurately probe high energy density matter states, it is vital to create powerful x-ray backlighters. One approach to create such x-ray sources is based on the usage of short-pulse, high-energy lasers, which greatly benefits from an optimization of the laser target coupling. Here, the spectral and temporal x-ray emission profiles of structured silicon targets with micron-sized spikes on the front surface are studied at laser intensities of 1017 W cm−2. The laser pulse length is varied between 1 and 20 ps with an energy of up to 1 kJ. The structured targets show an up to 13× enhancement of silicon Heα emission compared to flat foils with a well-defined, sharp emission pulse profile. Furthermore, the performance of the microstructured targets is compared to targets with a CH shield as well as foils irradiated with a UV prepulse.
- Published
- 2024
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