Absolute keV X-ray yield and conversion efficiency in over dense Si sub-petawatt laser plasma

Sergey N. Ryazantsev, Artem S. Martynenko, Maksim V. Sedov, Igor Yu. Skobelev, Mikhail D. Mishchenko, Yaroslav S. Lavrinenko, Christopher D. Baird, Nicola Booth, Phil Durey, Leonard N. K. Döhl, Damon Farley, Kathryn L. Lancaster, Paul McKenna, Christopher D. Murphy, Tatiana A. Pikuz, Christopher Spindloe, Nigel Woolsey, Sergey A. Pikuz