Optimization toward a high-average-brightness soft-x-ray laser pumped at grazing incidence

Cassou, K.; Kazamias, S.; Ros, D.; Ple, Fabien; Jamelot, G.; Klisnick, A.; Lundh, Olle; Lindau, Filip; Persson, Anders; Wahlström, C.‐G.; Rossi, Sébastien de; Joyeux, D.; Zielbauer, B.; Ursescu, D.; Kühl, T.

doi:10.1364/ol.32.000139

Cited by 37 publications

(22 citation statements)

References 10 publications

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“…An extensive multiparameter optimization of a transient Ni-like Mo soft Xray laser at 18.9 nm pumped under grazing incidence is reported in [9]. By imaging the soft X-ray laser at the output of the plasma rod, a detailed analysis of the effect of varying the GRIP angle among other parameters was reported.…”

Section: Lasing At 189 Nm Using Excitation Of Molybdenum Surfacementioning

confidence: 99%

X-ray Lasers, Plasma Properties and Harmonic Generation from Surfaces

Ganeev

2013

Laser - Surface Interactions

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In this chapter, the basic principles of surface-excited X-ray lasers are discussed. We demonstrate the achievements reported during studies of two laser systems, 13 nm Ag X-ray laser and 18.9 nm Mo X-ray laser. We show the methods for analysis of the plasma properties at strong laser-surface interactions. We demonstrate how laser plasmas generated by femtosecond radiation on the surface of boron and molybdenum targets are investigated by the shadowgraph method. The occurrence of plasma bullets is discussed, which were observed on both singlepulse and multi-pulse interaction with the same area of a target. Backscattered 2ω and 3ω/2 harmonics generation during the interaction of femtosecond radiation with the surfaces of various targets is analyzed. The efficient second and threehalved harmonics were achieved for low-Z targets, whereas only second-harmonic generation was observed for high-Z materials. Finally, we consider various peculiarities of harmonic generation from the surface interfaces during interaction with ultra-strong laser fields.Keywords X-ray lasers · Plasma for X-ray lasers · Harmonic generation from surfaces · 18.9 nm laser · Molybdenum laser · Surface plasma · High excitation shadowgraphs · Backscattered 2ω and 3ω/2 harmonics · Low-order harmonic generation · Laser chirp

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Section: Lasing At 189 Nm Using Excitation Of Molybdenum Surfacementioning

confidence: 99%

X-ray Lasers, Plasma Properties and Harmonic Generation from Surfaces

Ganeev

2013

Laser - Surface Interactions

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“…With this model, we simulated a Ni-like Molybdenum soft X-ray laser at 18.9 nm currently in use at the Laserix facility (Palaiseau) [36][37][38]. It is created by three successive 800 nm laser pulses irradiating a Molybdenum solid slab of 4 mm length.…”

Section: Experimental Comparisonmentioning

confidence: 99%

Study of rapid ionisation for simulation of soft X-ray lasers with the 2D hydro-radiative code ARWEN

Gaufridy

Velarde

Portillo³

et al. 2011

High Energy Density Physics

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Keywords:Transient ionisation Soft X-ray laser NLTE emissivity We present our fast ionisation routine used to study transient soft X-ray lasers with ARWEN, a twodimensional hydrodynamic code incorporating adaptative mesh refinement (AMR) and radiative transport.We compute global rates between ion stages assuming an effective temperature between singlyexcited levels of each ion. A two-step method is used to obtain in a straightforward manner the variation of ion populations over long hydrodynamic time steps. We compare our model with existing theoretical results both stationary and transient, finding that the discrepancies are moderate except for large densities. We simulate an existing Molybdenum Ni-like transient soft X-ray laser with ARWEN. Use of the fast ionisation routine leads to a larger increase in temperature and a larger gain zone than when LTE datatables are used.

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“…La figure 2 illustre des résultats caractéristiques que nous avons obtenus quant à la production de cette source. Le schéma de pompage repose sur une configuration en incidence rasante (Grazing incidence pumping, GRIP) qui permet notamment de focaliser l'impulsion courte sous un angle rasant par rapport à la cible, afin d'optimiser le dépôt énergétique du pompage, dans des zones du plasmaformé préalablement par l'impulsion longue -assurant la meilleure amplification possible [6][7][8].…”

Section: Développement Du Laser Xuv éMettant à 189 Nmunclassified