%0 Conference Paper %F Oral %T 0.27 GW Soft X-Ray Pulse Using a Plasma-Based Amplification Chain %+ Laboratoire d'optique appliquée (LOA) %+ Centro de Fisica de Plasmas %+ Instituto de Fusión Nuclear %+ Centre Laser de l'Université Paris Sud (CLUPS) %A Oliva, E. %A Fajardo, Marta %A Velarde, P. %A Ros, David %A Sebban, Stéphane %A Zeitoun, Philippe %< avec comité de lecture %B 13th International Conference on X-Ray Lasers (ICXRL) %C Paris, France %8 2012-06-11 %D 2012 %R 10.1007/978-3-319-00696-3_33 %K LASERS %K COHERENT %K BEAM %Z Physics [physics]/Physics [physics]/Optics [physics.optics] %Z Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph]Conference papers %X Seeding plasma-based soft-x-ray lasers (PBSXRL) with high order harmonics (HOH) has been demonstrated in plasmas created from gas targets (Zeitoun et al. in Nature 431:426, 2004) and solid targets (Wang et al. in Nat. Photonics 2:94, 2008), obtaining 1 mu J, 1 ps pulses. Reaching multi-microJoule, hundreds of fs regime is the ultimate goal. Recent papers (Oliva et al. in Opt. Lett. 34(17):26402642, 2009; Phys. Rev. E 82(5):056408, 2010) showed that increasing the width (up to 1 mm) of the plasma increases the amplification surface and improves the gain zone properties. Up to 20 mu J could be extracted when seeding but the temporal duration and profile was not studied. Simulations show that the HOH is weakly amplified whereas most of the energy is within a long (several picoseconds) wake induced by the HOH (Al'miev et al. in Phys. Rev. Lett. 99(12):123902, 2007; Kim et al. in Phys. Rev. Lett. 104:053901, 2010). Amplified Spontaneous Emission (ASE) is also present in the output beam. Using the 1D Maxwell-Bloch code DeepOne (Oliva et al. in Phys. Rev. A 84(1):013811, 2011) we will show that fully coherent, wake and ASE-suppressed, 21.6 mu J, 80 fs pulse can be obtained when optimizing at the same time both the seed and the plasma conditions %G English %L hal-01401599 %U https://ensta-paris.hal.science/hal-01401599 %~ X %~ ENSTA %~ CNRS %~ UNIV-PSUD %~ X-LOA %~ X-DEP %~ X-DEP-PHYS %~ ENSTA_LOA %~ UNIV-PARIS-SACLAY %~ UNIV-PSUD-SACLAY