量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
Thank you very much for using our website. On the 11th of March 2019, this site was moved from our own network server to the JAIRO Cloud network server. If you previously bookmarked this site, that bookmark will no longer work. We would be grateful if you could bookmark the website again. Thank you very much for your understanding and cooperation.
In the last two decades the regime of ultraintense (>1019 Wcm-2) laser pulses producing and interacting with plasma has revealed unprecedented advancements in particle acceleration and as a secondary source of high-energy radiation beams.
Previous experiments, developed in our group, have discovered coherent x-ray beams with high brightness (approaching that of FELs1) and composed of multiple high order harmonics2,3. The following experiments and simulations have shown that the produced x-ray sources are from tens to hundreds of nanometers in size. This novel phenomenon is known as BISER4.
Here, we report new experimental results concerning spatial distribution of these promising x-ray sources, which will enable a more rigorous understanding of the underpinning physics of its origin and the effect of specific laser parameters on its spatial pattern and brightness. Additionally, a potential alternative technique to measure their spatial distribution with a few hundred nanometers resolution is presented, which will enable both, the estimation of the source size and its brightness.
[1] C. Pellegrini and J. Stohr, Nucl. Instrum. Meth. A, 500, 33-40, 2003.
[2] A. S. Pirozhkov et al., Physical Review Letters, 108, 135004, 2012.
[3] A. S. Pirozhkov et al., New Journal of Physics, 16, 093003, 2014.
[4] A. S. Pirozhkov, T. Esirkepov et al., Scientific Reports, 7, 17968, 2017.
BISER X-ray structures in ultraintense laser-plasma interactions
