Overview of `Super-ASHURA' KrF Laser Program

Owadano, Yoshiro; Okuda, I.; Matsushima, I.; Takahashi, Eiichi; Miura, Eisuke; Yashiro, Hidehiko; Tomie, Toshihisa; Kuwahara, Kenji; Shinbo, M.

doi:10.1016/s0920-3796(98)00350-0

Cited by 12 publications

(7 citation statements)

References 3 publications

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“…Several approaches for UHI excimer laser systems (mainly KrF) were realized to-date (Schwarzenbach et al, 1986;Szatmari et al, 1987Szatmari et al, , 1988Szatmari et al, , 1992Szatmari et al, , 1996Glownia et al, 1988;Barr et al, 1988;Roberts et al, 1988;Watanabe et al, 1988Watanabe et al, , 1990Endoh et al, 1989;Taylor et al, 1990;Almasi et al, 1992Almasi et al, , 1995Bouma et al, 1993;Szatmari, 1994;Divall et al, 1996;Nabekawa et al, 1996;Omenetto et al, 1997;Shaw et al, 1999;Nabekawa et al, 2001;Owadano et al, 1999Owadano et al, , 2001Bekesi et al, 2002;Tao et al, 2002). Various schemes were used to generate seed femtosecond or picosecond pulses in hybrid dye/ excimer laser systems (Szatmari et al, 1987(Szatmari et al, , 1988 or in stimulated scattering processes (Takahashi, 2003(Takahashi, , 2005.…”

Section: Overview Of Ultrahigh-intensity Short-pulse Generation: Frommentioning

confidence: 99%

“…laser-plasma interaction during the past two decades at 0.1-10.0 kJ-class single-shot KrF facilities AURORA (Los Alamos National Laboratory; LANL) (Rosocha et al, 1986(Rosocha et al, , 1987Harris et al, 1993), NIKE Naval Research Laboratory (NRL) (Obenschain et al, 1996;Pawley et al, 1997Pawley et al, , 1999Aglitskiy et al, 2002), SPRITE (RAL) National Institute of Advanced Industrial Science and Technology (Shaw et al, 1993(Shaw et al, , 1999Divall et al, 1996), ASHURA National Institute of Advanced Industrial Science and Technology (AIS & T) (Owadano et al, 1989(Owadano et al, , 1993(Owadano et al, , 1999(Owadano et al, , 2001 and GARPUN Lebedev Physical Institute (LPI) (Basov et al, 1993;Zvorykin & Lebo, 1999;Zvorykin et al, 2001Zvorykin et al, , 2004Zvorykin et al, , 2006aWang et al, 2002), and especially at rep-rate Electra laser (NRL) (Sethian et al, 1998Wolford et al, 2006) have proved that e-beam-pumped KrF laser might be the best challenge for direct-drive ICF power plant. To satisfy physical and economical requirements, they should be scaled to output energies of 30-60 kJ per one module, operating all together with the total laser energy of $2 MJ at rep-rate of 5 Hz and overall system efficiency of 7.5% (Svyatoslavsky et al, 1992;Von Rosenberg, 1992;McGeoch et al, 1997;Sethian et al, 2003).…”

Section: Krf Drivers In the Fast-ignition Icf Problemmentioning

confidence: 99%

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GARPUN-MTW: A hybrid Ti:Sapphire/KrF laser facility for simultaneous amplification of subpicosecond/nanosecond pulses relevant to fast-ignition ICF concept

Зворыкин

Didenko²,

Ионин

et al. 2007

Laser Part. Beams

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The first stage of the petawatt excimer laser project started at the P.N. Lebedev Physical Institute, implements a development of multiterawatt hybrid GARPUN-MTW laser facility for generation of ultra-high intensity subpicosecond ultraviolet (UV) laser pulses. Under this project, a multi-stage e-beam-pumped 100-J, 100-ns GARPUN KrF laser was upgraded with a femtosecond Ti:Sapphire front-end, to produce combined subpicosecond/nanosecond laser pulses with variable time delay. Attractive possibility to amplify simultaneously short and long pulses in the same large-scale KrF amplifiers is analyzed with regard to the fast-ignition, inertial confinement fusion problem. Detailed description of hybrid laser system is presented with synchronized KrF and Ti:Sapphire master oscillators. Based on gain and absorption measurements at GARPUN amplifier and numerical simulations with a quasi-stationary code, we are predicting that 1.6 J can be obtained in a short pulse at hybrid GARPUN-MTW Ti:Sapphire/KrF laser facility, combined with several tens of joules in nanosecond pulse. Amplified spontaneous emission, which is responsible for the pre-pulse formation on a target, was also investigated: its acceptable level can be provided by properly choosing staged gain or loading the amplifiers by quasi-steady laser radiation. Fluorescence and transient absorption spectra of Ar/Kr/F 2 mixtures conventionally used in KrF amplifiers were recorded to find out the possibility for femtosecond pulse amplification at the broadband Kr 2 F (4 2 G ! 1,2 2 G) transition, which benefits in 100 times higher saturation energy density than for KrF (B ! X) transition.

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Section: Overview Of Ultrahigh-intensity Short-pulse Generation: Frommentioning

confidence: 99%

Section: Krf Drivers In the Fast-ignition Icf Problemmentioning

confidence: 99%

GARPUN-MTW: A hybrid Ti:Sapphire/KrF laser facility for simultaneous amplification of subpicosecond/nanosecond pulses relevant to fast-ignition ICF concept

Зворыкин

Didenko²,

Ионин

et al. 2007

Laser Part. Beams

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“…The design is based on proven concepts from Nike and Electra systems as well as progress in earlier large KrF systems. 33,34 We envision design and extensive testing of a full scale FTF amplifier module, nominally capable of 25 kJ laser output, and other critical components prior to constructing a FTF.…”

Section: The Krf Lasermentioning

confidence: 99%

Pathway to a lower cost high repetition rate ignition facility

et al. 2006

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An approach to a high-repetition ignition facility based on direct drive with the krypton-fluoride laser is presented. The objective is development of a "Fusion Test Facility" that has sufficient fusion power to be useful as a development test bed for power plant materials and components. Calculations with modern pellet designs indicate that laser energies well below a megajoule may be sufficient. A smaller driver would result in an overall smaller, less complex and lower cost facility. While this facility might appear to have most direct utility to inertial fusion energy, the high flux of neutrons would also be able to address important issues concerning materials and components for other approaches to fusion energy. The physics and technological basis for the Fusion Test Facility are presented along with a discussion of its applications.

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“…Rare gas halide excimer lasers are widely concerned as powerful ultra-violet sources [1][2][3][4][5] . Excimer laser has outstanding features including short wavelength, good uniform illumination, focal beam zooming and rep-rate operation, which leads to many advantages over glass lasers in target physics such as high coupling efficiency, high threshold of plasma parametric instabilities and minimal laser imprinting disturbance [6][7] .…”

Section: Introductionmentioning

confidence: 99%