Theoretical and experimental investigations of spectral and temporal properties of seeded soft x-ray lasers

We present in this paper theoretical and experimental investigations of temporal and spectral properties of seeded soft x-ray lasers. Bloch-Maxwell simulations of the harmonic pulse propagation in a soft x-ray laser plasma have been performed. Results show a growing wake of coherent radiation formed after the harmonic pulse.We describe the first measurement of the spectral bandwidth of a seeded soft x-ray laser. Using a varying path difference interferometer the spectral profile of a seeded OFI x-ray laser has been experimentally determined, leading to a Fourier-transform pulse duration of 5ps. The measured bandwidth is in good agreement with simulations. Finally we present the progress toward the implementation of a seeded soft x-ray laser at 18.9 nm at the new LASERIX facility.

[1]  Tomas Mocek,et al.  Characterization of the collisionally pumped optical-field-ionized soft-x-ray laser at 41.8 nm driven in capillary tubes , 2006 .

[2]  T. Mocek,et al.  A high-intensity highly coherent soft X-ray femtosecond laser seeded by a high harmonic beam , 2004, Nature.

[3]  Sophie Kazamias,et al.  High order harmonic generation optimization with an apertured laser beam , 2002 .

[5]  Tomas Mocek,et al.  Determination of the Ion Temperature in a Plasma Created by Optical Field Ionization , 2007 .

[6]  Klein,et al.  Frequency-fluctuation model for line-shape calculations in plasma spectroscopy. , 1995, Physical review. A, Atomic, molecular, and optical physics.

[7]  C. Menoni,et al.  High-brightness injection-seeded soft-x-ray-laser amplifier using a solid target. , 2006, Physical review letters.

[8]  K. Cassou,et al.  Longitudinal coherence and spectral profile of a nickel-like silver transient soft X-ray laser , 2006 .

[9]  G. J. Pert,et al.  The hybrid model and its application for studying free expansion , 1983, Journal of Fluid Mechanics.

[10]  Underwood,et al.  Experimental and theoretical investigation of neonlike selenium x-ray laser spectral linewidths and their variation with amplification. , 1994, Physical review. A, Atomic, molecular, and optical physics.

[11]  Gerard Jamelot,et al.  Design and demonstration of a high-energy booster amplifier for a high-repetition rate petawatt class laser system. , 2007, Optics letters.

[12]  Annie Klisnick,et al.  Maxwell-Bloch modeling of x-ray-laser-signal buildup in single- and double-pass configurations , 2000 .