Matter and Radiation at Extremes, 2019, 4 (2): 024402, Published Online: Oct. 17, 2019  

Alignment of solid targets under extreme tight focus conditions generated by an ellipsoidal plasma mirror

Author Affiliations
1 ELI Beamlines, Institute of Physics, 5. května 835, 252 41 Dolní B?e?any, Czech Republic
2 Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS), 46 Ul’yanov Street, 603950 Nizhny Novgorod, Russia
3 LULI—CNRS, Ecole Polytechnique, CEA: Université Paris-Saclay
4 UPMC Univ Paris 06: Sorbonne Universities, F-91128 Palaiseau Cedex, France
5 Research Center Toptec, Institute of Plasma Physics, Sobotecká 1660, 511 01 Turnov, Czech Republic
6 Joint Institute for High Temperatures Russian Academy of Science (JIHT RAS), Moscow 125412, Russia
7 Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University, Osaka, Japan
8 Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
9 Department of Physics SUPA, University of Strathclyde, Glasgow G4 0NG, United Kingdom
10 European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
Abstract
The design of ellipsoidal plasma mirrors (EPMs) for the PEARL laser facility is presented. The EPMs achieve a magnification of 0.32 in focal spot size, and the corresponding increase in focused intensity is expected to be about 8. Designing and implementing such focusing optics for short-pulse (<100 fs) systems paves the way for their use in future high-power facilities, where they can be used to achieve intensities beyond 1023 W/cm2. A retro-imaging-based target alignment system is also described, which is used to align solid targets at the output of the ellispoidal mirrors (with a numerical aperture of 0.75 in this case).

Deepak Kumar, Michal ?míd, Sushil Singh, Alexander Soloviev, Hannes Bohlin, Konstantin Burdonov, Gashaw Fente, Alexander Kotov, Livia Lancia, Vit Lédl, Sergey Makarov, Michael Morrissey, Sergey Perevalov, Denis Romanovsky, Sergey Pikuz, Ryousuke Kodama, David Neely, Paul McKenna, Tomá? La?tovi?ka, Mikhail Starodubtsev, Stefan Weber, Motoaki Nakatsutsumi, Julien Fuchs. Alignment of solid targets under extreme tight focus conditions generated by an ellipsoidal plasma mirror[J]. Matter and Radiation at Extremes, 2019, 4(2): 024402.

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