E-beam pumper ?Garpun? broadband KrF laser with ?1 GW pulsed lasing powere

Басов, Н. Г.; Bakaev, Valerii G.; Bogdanovskii, A. V.; Vadkovskii, A. V.; Grigor'yants, E A; Зворыкин, В. Д.; Metreveli, G. E.; Suchkov, A. F.; Sychugov, G. V.

doi:10.1007/bf01125724

Cited by 17 publications

(8 citation statements)

References 22 publications

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“…Two runs of irradiations with total energy fluence of 21.3 and 7.9 J/cm 2 caused ever-decreasing transmittance of quartz glasses and MgF 2 samples (figures 5,6). Compared with e-beam irradiation, the effect of soft X-rays with the same fluence is significantly more pronounced.…”

Section: Fluorescence and Transient Absorption Spectra Of Ar/kr/f 2 Mmentioning

confidence: 91%

“…Investigations of both laser physics and laser-plasma interaction performed with single-shot KrF facilities AURORA (LANL, USA) [1], NIKE (NRL, USA) [2], SPRITE (RAL, UK) [3], ASHURA (AIS&T, Japan) [4], HEAVEN-I (CIAE, China) [5], and GARPUN (LPI, Russia) [6] and especially with rep-rate ELECTRA laser (NRL, USA) [7] have proved that e-beam-pumped KrF laser might be the best challenge for the direct-drive Inertial Fusion Energy (IFE) [8]. Fusion Test Facility (FTF) [9] with twenty angular-multiplexed 28-kJ amplifiers operating uninterruptedly at 5 Hz for two years (≥3·10 8 shots) with efficiency ≥ 6% is the next milestone on the path to KrF IFE.…”

Section: Introductionmentioning

confidence: 99%

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Quests for inertial fusion energy conducted at GARPUN KrF laser facility

Зворыкин

Arlantsev²,

Gaynutdinov

et al. 2008

J. Phys.: Conf. Ser.

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Section: Fluorescence and Transient Absorption Spectra Of Ar/kr/f 2 Mmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Quests for inertial fusion energy conducted at GARPUN KrF laser facility

Зворыкин

Arlantsev²,

Gaynutdinov

et al. 2008

J. Phys.: Conf. Ser.

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“…KrF laser GARPUN operated in injection-controlled regime with a discharge-pumped EMG 150 TMSC master oscillator and electron-beam-pumped 16 Â 18 Â 100-cm amplifier equipped with an unstable resonator (with magnification factor M ¼ 6) (Basov et al, 1993;Zvorykin et al, 2007). It produced laser pulses of E las ¼ 100 J energy, with pulse duration at full width at half-maximum (FWHM) t las ¼ 75 ns and radiation divergence 0.1 mrad at 248-nm wavelength.…”

Section: Garpun Krf Laser Facilitymentioning

confidence: 99%

Planar shock waves in liquids produced by high-energy KrF laser: A technique for studying hydrodynamic instabilities

et al. 2008

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The paper is devoted to research and development of a novel experimental technique-liquid-filled laser-driven shock tube (LST) for modeling of Rayleigh-Taylor (RT) and Richtmyer-Meshkov (RM) hydrodynamic instabilities development at the contact surface of two immiscible liquids under shock wave (SW) passage. 100-J, 100-ns KrF laser facility GARPUN has been used to irradiate some opaque liquids. A homogenizing focusing system combined multi-element prism raster and a lens to provide non-uniformity less than a few percents across a square 7 Â 7-mm spot, laser intensities being varied in the range of q ¼ 0.004-2 GW/cm 2 . Surface plasma blow-off produced a planar SW, which propagated into the liquid. SW amplitudes as high as 0.8 GPa weakly damping with increasing thickness were measured in dibutyl-phthalate (DBP), which volumetrically absorbed ultraviolet (UV) laser light. Nonlinear absorption coefficients and laser breakdown thresholds were measured for pure water and UV optical materials intended to confine plasma. Test bench experiments were performed to produce standing acoustic waves as initial perturbations at the interface between two immiscible liquids.

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“…The schlieren and shadow techniques with a quasi-steady collimated probe beam produced by a capillary-discharge light source were combined with the high-speed slit-scanning recording of images of laser plasma in self luminescence 35,37 .…”

Section: Garpun Laser Installation and Experimental Proceduresmentioning

confidence: 99%

“…Multistage KrF laser "GARPUN" 35 was used in experiments on irradiation of solid targets (C, Zn, Mg, Ge, Fe, Ta, Pb, W) and thin CH films of 1 to 50-µm thickness. The laser facility consists of a discharge-pumped EMG 150 TMSC excimer master oscillator and two electron-beam-pumped modules: a large-aperture amplifier of 16*18*100-cm gain volume and 10*10*100-cm preamplifier.…”

Section: Garpun Laser Installation and Experimental Proceduresmentioning

confidence: 99%

High-energy GARPUN KrF laser interaction with solid and thin-foil targets in ambient air

Зворыкин

Bakaev

Batani

et al. 2004

High-Power Laser Ablation V

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Hydrodynamic regimes of KrF laser interaction with solid and thin-film targets in atmospheric and reduced pressure air were investigated at high-energy GARPUN installation. These experiments were performed with 100-J, 100-ns laser pulses in planar focusing geometry and compared with numerical simulations with ATLANT code to verify the concept of laser-driven shock tube (LST), which could accelerate a gas to hypersonic velocity and produce strong shock waves (SW). Laser beam was focused by a prism raster optical system that provided very uniform intensity distribution at moderate laser intensities q ≤ 1 GW/cm 2 over a square spot of ~ 1-cm size. Dynamics of laser-produced plasma and SW in a surrounding gas were investigated by means of high-speed photo-chronograph and streak camera in combination with shadow or schlieren techniques, time and space resolved spectroscopy in a visible spectral range. Both experiments and simulations confirmed that target evaporation and blow-up of expanding plasma are the main mechanisms of UV laser-target interaction in a surrounding gas. Planar shock waves with velocities up to 7 km/s towards the laser beam were observed in a normal density air and up to 30 km/s in a rarefied air. Acceleration of thin CH films of 1 to 50-µm thickness was investigated both in a free-expansion and plasma-confined regimes with the highest achieved velocities up to 4 km/s. The SW damping law in a free space independently on laser intensity and air pressure could be approximated by a power law x ~ t n with a power indexes n 1 = 0.85 -0.95 at the initial stage and n 2 = 0.5 -0.6 later, when a distance of the SW front from a target became comparable with a size of the irradiated spot. Instability growth at contact interfaces between ablative plasma and accelerated film, as well as between plasma and compressed air were observed and compared for various initial irradiation non-uniformities. They were introduced by a grid, which was set in front of the film target.

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E-beam pumper ?Garpun? broadband KrF laser with ?1 GW pulsed lasing powere

Cited by 17 publications

References 22 publications

Quests for inertial fusion energy conducted at GARPUN KrF laser facility

Quests for inertial fusion energy conducted at GARPUN KrF laser facility

Planar shock waves in liquids produced by high-energy KrF laser: A technique for studying hydrodynamic instabilities

High-energy GARPUN KrF laser interaction with solid and thin-foil targets in ambient air

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