D. Ursescu

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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)
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)
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)
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)
We present recent results on the extensive investigation of a Ni-like Mo X-ray laser pumped in the transient regime and GRIP (grazing incidence pumping) configuration. The pump laser was the 10 Hz, multi-terawatt, Ti:Sa laser system at Lund Laser Centre, Sweden. The main diagnostic was a monochromatic near-field imaging system with a 1.7 micron spatial(More)
We report the major achievements of the construction of the Petawatt High-Energy Laser for Heavy-Ion Experiments (PHELIX) that will be capable of producing pulses up to the peak power of one PW (10 15 W) in 500 fs and 4 kJ in 10 ns. In July and August, the commissioning of the main amplifier (MA) of PHELIX was started employing the stretched pulses of the(More)
Construction at the PHELIX laser project [1] continued during the year 2002. The major milestones reached this year are full operation of the amplifier cleaning procedures, testing of all high voltage components on hand and firing of amplifier heads fully equipped with flash lamps, compression of laser pulses form the short pulse front end, arrival of laser(More)
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