Ultra-intense X-ray radiation photopumping of exotic states of matter by relativistic laser–plasma in the radiation-dominated kinetic regime (RDKR)

Faenov, A. Ya and Colgan, J. and Pikuz, S. A. and Zhidkov, A. and Pikuz, T. A. and Abdallah, J. and Tubman, E. and Butler, N. M. H. and Dance, R. J. and Skobelev, I. Yu. and Alkhimova, M. Z. and Booth, N. and Green, J. and Gregory, C. and Andreev, A. and Nishiuchi, M. and Sakaki, H. and Sagisaka, A. and Pirozhkov, A. S. and Ogura, K. and Fukuda, Y. and Kanasaki, M. and Hasegawa, N. and Nishikino, M. and Kando, M. and Kawachi, T. and Kondo, K. and McKenna, P. and Tallents, G. J. and Woolsey, N. and Kodama, R.; Kawachi, Tetsuya and Bulanov, Sergei V. and Daido, Hiroyuki and Kato, Yoshiaki, eds. (2018) Ultra-intense X-ray radiation photopumping of exotic states of matter by relativistic laser–plasma in the radiation-dominated kinetic regime (RDKR). In: X-Ray Lasers 2016. Springer Proceedings in Physics . Springer, Cham, Switzerland, pp. 149-158. ISBN 9783319730257 (https://doi.org/10.1007/978-3-319-73025-7_23)

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Abstract

In the present report, we discussed our recent results concerning the investigations of high energy density matter. By using of high-resolution X-ray spectroscopic measurements and kinetic simulations, we demonstrate that the energy of femtosecond laser pulses is efficiently converted to X-ray radiation and produces exotic states in solid density plasma regions. It is shown that exotic hollow multicharged ions states can be obtained and studied not only by ultra-intense X-ray radiation of XFEL lasers, but also upon using optical laser technology. We have concluded that observable features of the hollow-ion spectra are sensitive to such plasma parameters as density, temperature, hot-electron fraction, and intensity of the X-ray pumping radiation and could be used for effective diagnostics of warm dense matter parameters.