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A transient collisionally pumped X-ray laser (XRL) driven by the infrared pulses from the PHELIX laser preamplifier at GSI has successfully been put into operation. Strong lasing at 22 nm has been observed in nickel-like zirco-nium. Experimental data from the optimization of the XRL energy output support the conclusion that inverse Bremsstrahlung plays a(More)
Intense and stable laser operation with Ni-like Zr and Ag was demonstrated at pump energies between 2 J and 5 J energy from the PHELIX pre-amplifier section. A novel single mirror focusing scheme for the TCE x-ray laser ~XRL! has been successfully implemented by the LIXAM0MBI0GSI collaboration under different pump geometries. This shows potential for an(More)
To facilitate the use of the extended nuclear shell model (NSM), a FERMI module for calculating some of its basic quantities in the framework of MAPLE is provided. The Moshinsky brackets, the matrix elements for several central and non-central interactions between nuclear two-particle states as well as their expansion in terms of Talmi integrals are easily(More)
One of the unique features of the PHELIX installation is the combination of the ultra-high intensity laser with the heavy-ion accelerator facility at GSI and its planned extension FAIR. One proposal within the SPARC program is the generation of high quality X-ray laser beams for X-ray laser spectroscopy of highly-charged ions. The long range perspective is(More)
A soft x-ray laser from Ni-like Mo, pumped in grazing incidence (GRIP), is analyzed with regard to high repetition rate operation. Reliable lasing is obtained, but with significant energy fluctuations attributed mainly to beam pointing jitter from the pump laser. Two modes of operation are compared: continuously moving target and stationary target. With a(More)
The transient collisionally pumped soft X-ray lasers [1] are generated by the interaction of two laser pulses with a solid target. The target is strongly ionized by the first long pulse (100 ps-1 ns) and the second short one (500 fs – 10 ps) induces the population inversion that is responsible for the soft X-ray laser transition. An important feature of(More)
Characterization of the chirp in stretched laser pulses is performed with a novel, simple method, based on the use of a plasma mirror switch coupled with a spectrometer. For a 36nm full width half maximum bandwidth and 360ps chirped laser pulse, the spectral phase of the pulse was measured in few hundred of points. Besides the chirp measurement, the(More)
Harmonic seeded operation of a neon-like titanium plasma-based soft x-ray laser is described. The plasma amplifier is pumped with a variation of the grazing incidence technique involving a fast and localized ionization step. We discuss its effect on gain dynamics by measuring the amplifying factor as a function of the delay between pump pulse and harmonic(More)
Development of efficient soft x-ray laser plasma amplifiers adapted to seeded operation, requires a better control over amplifier transverse spatial extent, brilliance control and gain lifetime. Here it is shown that pumping the plasma amplifier with one long and two short pump pulses (1L2S) provides advantages in terms of control for the specified(More)