OMEGA EP high-energy petawatt laser: progress and prospects

Maywar, Drew N.; Kelly, John; Waxer, L. J.; Morse, Samuel Finley Breese; Begishev, I. A.; Bromage, J.; Dorrer, C.; Edwards, J. L.; Folnsbee, L.; Guardalben, M. J.; Jacobs, Stephen D.; Jungquist, R.; Kessler, T. J.; Kidder, Richard; Kruschwitz, B. E.; Loucks, S. J.; Marciante, John R.; McCrory, R. L.; Meyerhofer, D. D.; Okishev, A. V.; Oliver, J. B.; Pien, G.; Qiao, Jie; Puth, J.; Rigatti, A. L.; Schmid, Ansgar W.; Shoup, M. J.; Stoeckl, C.; Thorp, K.; Zuegel, J. D.

doi:10.1088/1742-6596/112/3/032007

Cited by 74 publications

(28 citation statements)

References 11 publications

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“…Two ultraviolet OMEGA-EP [32] beams irradiate the ablator in sequence, driving a shock wave into the system, which then crosses the physics-relevant interface about 17 ns later. The beams have a 10 ns, flat-topped temporal profile, with the tail end of the first pulse and the lead end of the second pulse tapered to allow the most stable profile possible during the transition, and a spatial profile of diameter 1100 µm at full-width, half-maximum, smoothed by distributed phase plates.…”

Section: Experimental Conditionsmentioning

confidence: 99%

Measurement of Richtmyer–Meshkov mode coupling under steady shock conditions and at high energy density

Stéfano

Malamud

Kuranz

et al. 2015

High Energy Density Physics

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We present experiments observing Richtmyer-Meshkov mode coupling and bubble competition in a system arising from wellcharacterized initial conditions and driven by a strong (Mach∼8) shock. These measurements and the analysis method developed to interpret them provide an important step towards the possibility of observing self-similarity under such conditions, as well as a general platform for performing and analyzing hydrodynamic instability experiments. A key feature of these experiments is that the shock is sustained sufficiently long that this nonlinear behavior occurs without decay of the shock velocity or other hydrodynamic properties of the system, which facilitates analysis and allows the results to be used in the study of analytic models.

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Section: Experimental Conditionsmentioning

confidence: 99%

Measurement of Richtmyer–Meshkov mode coupling under steady shock conditions and at high energy density

Stéfano

Malamud

Kuranz

et al. 2015

High Energy Density Physics

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“…On large laser systems [4][5][6][7][8][9][10][11][12][13][14] , there is an ongoing effort to continuously improve various aspects of system performance. Some new problems appear in the process of development of the large solid-state laser system, such as laserinduced optics damage [15][16][17][18][19] , nonlinear effects after longrange transport of the laser [20,21] and self-focussing in highenergy Nd:glass laser [22] .…”

Section: Introductionmentioning

confidence: 99%

Hundred-Joule-level, nanosecond-pulse Nd:glass laser system with high spatiotemporal beam quality

Wang

Lü

et al. 2016

High Pow Laser Sci Eng

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A 100-J-level Nd:glass laser system in nanosecond-scale pulse width has been constructed to perform as a standard source of high-fluence-laser science experiments. The laser system, operating with typical pulse durations of 3-5 ns and beam diameter 60 mm, employs a sequence of successive rod amplifiers to achieve 100-J-level energy at 1053 nm at 3 ns. The frequency conversion can provide energy of 50-J level at 351 nm. In addition to the high stability of the energy output, the most valuable of the laser system is the high spatiotemporal beam quality of the output, which contains the uniform square pulse waveform, the uniform flat-top spatial fluence distribution and the uniform flat-top wavefront.

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“…These devices are intrinsically lossy because they attenuate light instead of redistributing it, but the higher losses are acceptable considering the absence of a competitive technology that could meet all the requirements. Binary beam shapers based on small amplitude pixels [5] are used on the National Ignition Facility [12] and the OMEGA EP Laser System [13,14]. These devices generate continuous gray-level modulation by combining reimaging and far-field filtering of distributions of transparent or opaque pixels [ Fig.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the chromaticity of near-field binary beam shapers

Dorrer

2013

Appl. Opt.

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The chromatic properties of binary beam shapers inducing a spatially dependent transmission on the near field of an optical source after far-field filtering and imaging are derived. Beam shapers using pixels with two transmission states are highly versatile and have been experimentally realized with distributions of amplitude pixels, phase pixels, or polarization pixels that can be designed using a half-toning algorithm. The amplitude of the shaped beam in an image plane has a precisely controlled continuous profile given by the local density of the two pixel types in the object plane. The wavelength dependence of the field transmission corresponding to the full range of design transmission between 0 and 1 is studied analytically to assess the general performance of the corresponding beam shapers for broadband sources, with an example of a specific 2D transmission profile relevant to laser engineering. Amplitude beam shapers have no significant chromaticity, but have low damage threshold. The high-damage-threshold twisted nematic liquid crystal and phase shapers induce a wavelength-dependent transmission and phase on the shaped beam.

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OMEGA EP high-energy petawatt laser: progress and prospects

Cited by 74 publications

References 11 publications

Measurement of Richtmyer–Meshkov mode coupling under steady shock conditions and at high energy density

Measurement of Richtmyer–Meshkov mode coupling under steady shock conditions and at high energy density

Hundred-Joule-level, nanosecond-pulse Nd:glass laser system with high spatiotemporal beam quality

Analysis of the chromaticity of near-field binary beam shapers

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