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19Complex Systems of Charged Particles and their Interactions with Electromagnetic Radiation 2018
INVESTIGATION OF ENERGY TRANSFER IN FOILS HEATED BY PETAWATT LASER PULSES BY METHODS OF X-RAY ABSORPTION SPECTROSCOPY
Ryazantsev S.N.1,@, Skobelev I.Yu.1,2, Arich D.D.2,1, Bratchenko P.S.2,1, Faenov A.Ya.1,3, Pikuz T.A.1,4, Durey P.5, Doehl L.5, Farley D.5, Baird C.5, Lancaster K.5 , Murphy C.5, Booth N.6, Spindloe C.6, McKenna P.7, Hansen S.B.8, Colgan J.9, Kodama R.3,4, Woolse N.5,
Pikuz S.A.1,2
Joint Institute for High Temperatures of the Russian Academy of Sciences, Izhorskaya 13 Bldg 2,
Moscow 125412, Russia
2National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe
Shosse 31, Moscow 115409, Russia 3Open and Transdisciplinary Research Initiative, Osaka University, 1-1 Yamadaoka, Suita, Osaka 5650871, Japan
4Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan 5York Plasma Institute, Department of Physics, University of York, Church Lane, Heslington, York YO10
5DQ, United Kingdom (Great Britain) 6Central Laser Facility, Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire OX11
0QX, United Kingdom (Great Britain) 7Department of Physics, University of Strathclyde, 107 Rottenrow East, Glasgow G4 0NG, United
Kingdom (Great Britain) 8Sandia National Laboratories, Albuquerque, New Mexico 87123, United States 9Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
sergryaz@mail.ru
Absorption X-ray spectroscopy is proposed as a method for studying the heating of solid-density matter excited by secondary X-ray radiation from a relativistic laser-produced plasma.
The method was developed and applied to experiments involving thin silicon foils irradiated by
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0.5-1.5 ps duration ultra-high contrast laser pulses with intensities (0.5-2.5)^10 W/cm . The electron temperature of material at the rear side of a target is estimated to be in the range of 140300 eV. The diagnostic approach accessed and enables the diagnosis of warm dense matter states with a low self-emissivity.
