Heat wave fast ignition in inertial confinement energy

Eliezer, S.; Pinhasi, Shirly Vinikman

doi:10.1017/hpl.2013.5

Cited by 8 publications

(4 citation statements)

References 22 publications

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“…To attain ignition conditions, a laser driver for inertial confinement fusion (ICF) should have output energy of the order of megajoules at the appropriate wavelength over a pulselength of a few nanoseconds [1][2][3][4] . The rod and disk amplifiers for high-peak-power laser applications are the key components of Nd:glass ICF drivers, which provide the maximum laser energy and are pumped by flash lamps [5,6] .…”

Section: Introductionmentioning

confidence: 99%

Radiation model of a xenon flash lamp in a laser amplifier pump cavity

Zhu

Zhang

et al. 2015

High Pow Laser Sci Eng

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Understanding the radiation model of a flash lamp is essential for the reflector design of a laser amplifier. Reflector design often involves several simplifying assumptions, like a point or Lambertian source; either of these assumptions may lead to significant errors in the output distribution. In practice, source non-idealities usually result in sacrificing the amplifier's gain coefficient. We propose a novel test technique for attaining the xenon flash lamp absolute spectral intensity at various angles of view, and then accurately predict radiation distributions and generate the reflector shape. It is shown that due to the absorption of emitted radiation by the lamp itself, the behavior of the radiation model at various wavelengths is different. Numerical results of xenon plasma absorption coefficient were compared with the measured data. A reasonable agreement was obtained for the absorption coefficient parameters. Thus, this work provides a useful analytical tool for the engineering design of laser amplifier reflectors using xenon flash lamps as pumps.

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Section: Introductionmentioning

confidence: 99%

Radiation model of a xenon flash lamp in a laser amplifier pump cavity

Zhu

Zhang

et al. 2015

High Pow Laser Sci Eng

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“…(9) Furthermore, the use of an extra laser-induced shock wave created by the same lasers that compressed the target in order to ignite the target was suggested [25] . (10) Alternatively the FI shock wave from a laser-accelerated impact foil [26,27] was proposed. The shock wave ignition schemes are actually based on heating by collision of two shock waves using tailored laser pulses that had already been suggested [28] even before the idea of FI was explicitly published [13,14] .…”

Section: Introductionmentioning

confidence: 99%

Ultrafast ignition with relativistic shock waves induced by high power lasers

Eliezer

Nissim²,

Pinhasi³

et al. 2014

High Pow Laser Sci Eng

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In this paper we consider laser intensities greater than 10 16 W cm −2 where the ablation pressure is negligible in comparison with the radiation pressure. The radiation pressure is caused by the ponderomotive force acting mainly on the electrons that are separated from the ions to create a double layer (DL). This DL is accelerated into the target, like a piston that pushes the matter in such a way that a shock wave is created. Here we discuss two novel ideas. Firstly, the transition domain between the relativistic and non-relativistic laser-induced shock waves. Our solution is based on relativistic hydrodynamics also for the above transition domain. The relativistic shock wave parameters, such as compression, pressure, shock wave and particle flow velocities, sound velocity and rarefaction wave velocity in the compressed target, and temperature are calculated. Secondly, we would like to use this transition domain for shockwave-induced ultrafast ignition of a pre-compressed target. The laser parameters for these purposes are calculated and the main advantages of this scheme are described. If this scheme is successful a new source of energy in large quantities may become feasible.

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“…This feature is important in laser cooling and trapping experiments because the repulsive optical dipole force for blue detuned laser light restricts the atoms to the inner dark region of the laser beam, where photon scattering and the associated heating are minimized. Such hollow-structured LG laser can be used to investigate some difficult problems, such as generation of x-rays with orbital angular momentum 52 53 54 , plasma accelerators 55 56 , fast ignition for inertial confinement fusion 57 58 59 , and pulsars in the astrophysical environment 60 .…”

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confidence: 99%

Hollow screw-like drill in plasma using an intense Laguerre–Gaussian laser

Wang

Shen

Zhang

et al. 2015

Sci Rep

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With the development of ultra-intense laser technology, MeV ions can be obtained from laser–foil interactions in the laboratory. These energetic ion beams can be applied in fast ignition for inertial confinement fusion, medical therapy, and proton imaging. However, these ions are mainly accelerated in the laser propagation direction. Ion acceleration in an azimuthal orientation was scarcely studied. In this research, a doughnut Laguerre–Gaussian (LG) laser is used for the first time to examine laser–plasma interaction in the relativistic intensity regime in three-dimensional particle-in-cell simulations. Studies have shown that a novel rotation of the plasma is produced from the hollow screw-like drill of an mode laser. The angular momentum of particles in the longitudinal direction produced by the LG laser is enhanced compared with that produced by the usual laser pulses, such as linearly and circularly polarized Gaussian pulses. Moreover, the particles (including electrons and ions) can be trapped and uniformly compressed in the dark central minimum of the doughnut LG pulse. The hollow-structured LG laser has potential applications in the generation of x-rays with orbital angular momentum, plasma accelerators, fast ignition for inertial confinement fusion, and pulsars in the astrophysical environment.

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Heat wave fast ignition in inertial confinement energy

Cited by 8 publications

References 22 publications

Radiation model of a xenon flash lamp in a laser amplifier pump cavity

Radiation model of a xenon flash lamp in a laser amplifier pump cavity

Ultrafast ignition with relativistic shock waves induced by high power lasers

Hollow screw-like drill in plasma using an intense Laguerre–Gaussian laser

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