Laser effect on the 248nm KrF transition using heavy ion beam pumping

Adonin, A.; Jacoby, J.; Turtikov, V. I.; Fertman, A.; Голубев, А. А.; Hoffmann, D. H. H.; Ulrich, A.; Varentsov, D.; Wieser, J.

doi:10.1016/j.nima.2007.02.030

Cited by 3 publications

(5 citation statements)

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“…Powerful lasers, pulsed, high power electrical discharges, high explosives, gas guns, and intense particle beams from accelerators are commonly used experimental tools to generate high energy density states in matter or warm-dense-matter (WDM) Zou et al, 2006;Zvorykin et al, 2007;Hora, 2007;Tahir et al, 2007a;Adonin et al, 2007;Mitchell et al, 1991;Weir et al, 1996). Among these techniques, heavy ion beams are relatively new .…”

Section: Introductionmentioning

confidence: 99%

Temperature measurement of warm-dense-matter generated by intense heavy-ion beams

Kulish

Минцев

et al. 2008

Laser Part. Beams

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This paper describes a fast multi-channel radiation pyrometer that was developed for warm dense-matter experiments with intense heavy ion beams at the Gesellschaft für Schwerionenforschung mbH (GSI). The pyrometer is capable of measuring brightness temperatures from 2000 K to 50,000 K, at six wavelengths in the visible and near-infrared parts of the spectrum, with 5 ns temporal resolution, and several micrometers spatial resolution. The pyrometer's spectral discrimination technique is based on interference filters, which also act as mirrors to allow for simultaneous spectral discrimination of the same ray at multiple wavelengths.

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Section: Introductionmentioning

confidence: 99%

Temperature measurement of warm-dense-matter generated by intense heavy-ion beams

Kulish

Минцев

et al. 2008

Laser Part. Beams

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“…Spectra of spontaneous emission from the laser gas (observed perpendicularly to the beam axis) as well as laser output spectra were recorded with the same spectrometer. By comparing both spectra, a clear difference was found between the widths of the KrF* line (l ¼ 248 nm) in on-axis spectra and spectra recorded at 908 with respect to the optical axis (Adonin et al, 2007a). The effect is clearly visible but due to the relatively low spectral resolution of the spectrometer of 2.3 nm not very pronounced.…”

Section: Spectral Measurementsmentioning

confidence: 93%

“…The experiment was performed at the HHT target area at GSI in December 2005 (Ulrich et al, 2006a(Ulrich et al, , 2006bAdonin et al, 2007a). Pulses of uranium ions provided by the universal linear accelerator at GSI (UNILAC) were accumulated in the SIS-18 (heavy ion synchrotron at GSI) using the multi-multi-turn injection scheme (Spiller et al, 2006).…”

Section: Ion Beam and Target Parametersmentioning

confidence: 99%

“…As soon as the ion beam intensity became higher than a certain value, strong laser emission on the line at l ¼248 nm appeared in the spectrum (Ulrich et al, 2006a(Ulrich et al, , 2006bAdonin et al, 2007a). This indicated that the pumping power density provided by the ion beam exceeded the power level necessary to reach the laser threshold in the optical cavity.…”

Section: Spectral Measurementsmentioning

confidence: 99%

“…As an alternative to laser induced plasmas that are meanwhile routinely used for pumping short wavelength lasers (Kuehl et al, 2007;Neumayer et al, 2005), heavy ion beams may be considered as a pumping source, which can also provide high power densities in a target material . In this work, the first successful operation of a KrF* excimer laser at l ¼ 248 nm pumped with an intense, high energy uranium ion beam (Ulrich et al, 2006a(Ulrich et al, , 2006bAdonin et al, 2007a) is described in detail.…”

Section: Introductionmentioning

confidence: 99%

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Intense heavy ion beams as a pumping source for short wavelength lasers

et al. 2009

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The high energy loss of heavy ions in matter as well as the small angular scattering makes heavy ion beams an excellent tool to produce almost cylindrical and homogeneously excited volumes in matter. This aspect can be used to pump short wavelength lasers. For the first time, a beam of heavy ions was used to pump a short wavelength gas laser in an experiment performed at the GSI ion accelerator facility in December 2005. In this experiment, the well-known KrF* excimer laser was pumped with an intense uranium beam. Pulses of an uranium beam compressed down to 110 ns (full width at half maximum) with initial particle energy of 250 MeV per nucleon were stopped inside a gas laser cell. A mixture of an excimer laser premix gas (95.5%Kr þ 0.5%F 2 ) and a buffer gas (Ar) in different proportions was used as the laser gas. The maximum beam intensity reached in the experiment was 2.5 Â 10 9 particles per pulse, which resulted in 34 J/g specific energy deposited in the laser gas. The laser effect on the transition at l ¼ 248 nm has been successfully demonstrated by various independent methods. There, the laser threshold was reached with a beam intensity of 1.2 Â 10 9 particles per pulse, and the energy of the laser pulse of about 2 mJ was measured for an ion beam intensity of 2 Â 10 9 particles per pulse. As a next step, it is planned to reduce the laser wavelength down to the vacuum ultraviolet spectral region, and to proceed to the excimer lasers of the pure rare gases. The perspectives for such experiments are discussed and the detailed estimations for Xe and Kr cases are given. We believe that the use of heavy ion beams as a pumping source may lead to new pumping schemes on the higher lying level transitions and considerably shorter wavelengths, which rely on the high cross sections for multiple ionization of the target species.

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High Energy Density Physics With Intense Particle and Laser Beams

Hoffmann

Blažević²,

Tahir³

et al. 2009

Int. J. Mod. Phys. E

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Interaction of intense ion radiation with matter has numerous applications in different fields of science, ranging from basic research of plasma properties to application in energy science. Energy loss processes of heavy ions in plasma and cold matter are important to understand the generation of high energy density states in matter. The hot dense plasma of an inertial fusion target is just one example. Of special interest are phase transitions, when irradiated matter passes through the parameter regime of warm dense matter, which is located in the phase diagram at high density but relatively low temperature. Typical parameters are in the pressure range of kbar to Mbar and temperatures ranging into the few eV regime. We present an overview on recent results and developments of beam plasma, and beam matter interaction processes studied with heavy ion beams from the GSI accelerator facilities, which consist of an rf-accelerator (UNILAC: Universal Linear Accelerator), a heavy ion synchrotron (SIS 18) and an experimental storage ring (ESR). The synchrotron SIS18 currently delivers an intense uranium beam that deposits about 1 kJ/g specific energy in solid matter. Using this beam, high energy density states close to the critical point of lead, have been reached and solid lead foils have been heated to a measured brightness temperature on the order of 5000 K.

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Laser effect on the 248nm KrF transition using heavy ion beam pumping

Cited by 3 publications

References 12 publications

Temperature measurement of warm-dense-matter generated by intense heavy-ion beams

Temperature measurement of warm-dense-matter generated by intense heavy-ion beams

Intense heavy ion beams as a pumping source for short wavelength lasers

High Energy Density Physics With Intense Particle and Laser Beams

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