Silicon x-ray backlighter improvement by targets with spike-like microstructures
Source abstract
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.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Laser-Plasma Interactions and Diagnostics · Advanced X-ray Imaging Techniques · Atomic and Molecular Physics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, Institute for Nuclear Physics, Technical University Darmstadt 1 , Darmstadt, Germany
Lawrence Livermore National Laboratory 2 , Livermore, California 94550, USA
Laboratory for Laser Energetics 3 , Rochester, New York 14623, USA
Funding
Deutsche Forschungsgemeinschaft, Excellence Initiative, Darmstadt Graduate School of Excellence Energy Science and Engineering · Bundesministerium für Bildung und Forschung · Hessisches Ministerium für Wissenschaft und Kunst · U.S. Department of Energy · University of Rochester · New York State Energy Research and Development Authority
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