Foam Au driven by 4<i>ω</i>–2<i>ω</i> ignition laser pulse for inertial confinement fusion

Lan, Ke; Song, Peng

doi:10.1063/1.4983329

Cited by 10 publications

(3 citation statements)

References 44 publications

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“…In 2003 and subsequently in 2005, Hammer and Rosen proposed to use low density gold foam material for the hohlraum cavity useful in reduction of wall loss and consequently enhancement of x-ray emission yield [32,33] and thereafter, a few experiments on enhancement of x-rays by gold foam targets are reported. The CE of laser to x-ray is investigated for low density gold foam target using 1D hydrodynamic theoretical simulation and several experiments are performed [23,[34][35][36]. The authors reported an enhancement of CE for 0.1 g/cc Au in comparison to solid gold.…”

Section: Introductionmentioning

confidence: 99%

Demonstration of gold foam plasma as bright x-ray source and slow ion emitters

Kaur

Chaurasia²,

Борисенко

et al. 2019

Plasma Phys. Control. Fusion

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In this paper, enhancement in x-ray emission and reduction of kinetic energy of ions from low density foam plasma is demonstrated by performing experiment and hydrodynamic simulation. The plasma is produced by irradiation of solid gold and gold foam targets (densities 0.2 g/cc, 0.13 g/cc and 0.1 g/cc) at intensities in the range of 4×10 13 -1×10 14 W cm −2 . Time resolved x-ray emission is measured by an x-ray streak camera with 10 ps resolution. The x-ray flux measured by the streak camera from low density gold foam shows a 13% enhancement in comparison to solid gold in the spectral range >0.8 keV and above. Decrease in velocity of ions is observed in low density gold foam. In solid gold, thermal ions peak velocity is 31×10 4 m s −1 and spread in narrow energy width, however, in case of 0.1 g/cc, peak velocity reduces to 6×10 4 m s −1 towards target normal and emitted in broad energy range. Shadowgraphy results also provide evidence of narrower expansion of plasma from solid gold. However, total ion flux from low density gold foam is comparable to ion flux of solid gold indicating the process of volumetric absorption.

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Section: Introductionmentioning

confidence: 99%

Demonstration of gold foam plasma as bright x-ray source and slow ion emitters

Kaur

Chaurasia²,

Борисенко

et al. 2019

Plasma Phys. Control. Fusion

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“…Meanwhile, a series of experiments of the Spherical Hohlraum Campaign (SPHC) have been performed on the ShenGuang laser facilities in Shanghai and Mianyang in China to test its performance (Huo et al 2016a, b;Xie et al 2016;Chen et al 2017;Li et al 2017c;Shu et al 2018). Finally, it is proposed to use 2ω lasers for future ignition facilities with a configuration designed for the octahedral spherical hohlraum and to use a foam wall to increase the coupling efficiency from the laser to the capsule (Lan and Song 2017;.…”

Section: Inertial Confined Fusion Driven By Lasersmentioning

confidence: 99%

Summary of laser plasma physics sessions at the first AAPPS-DPP conference

Sheng

2018

Rev. Mod. Plasma Phys.

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The presentations on laser plasma physics at the first AAPPS-DPP conference covered topics of inertial confined fusion physics and technologies, laboratory astrophysics and high-energy density physics, laser plasma-based particle acceleration (electrons and ions) and radiation, fundamental laser plasma physics, and related high-power laser system development. This report summarizes the major advances in these topics presented at the plenary and oral sessions.

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“…Recently, a hollow-walled hohlraum (I-Raum) was designed to reduce the growth of the gold bubble and stabilize the gold-gas interface [18]. Experimental results showed that the implosion core has been more prolate for the I-Raum compared to the cylinder hohlraum [19].…”

Section: Introductionmentioning

confidence: 99%

Tamping the movement of the laser absorption cutoff position using gold foam hohlraum

ZHANG 张,

LI 李,

LIN 林

et al. 2024

Plasma Sci. Technol.

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In indirect-driven laser fusion experiments, the movement of the laser absorption layer will distort the radiation uniformity on the capsule. The gold foam has advantages in symmetry control and lowering wall plasma blowoff when used in an inertial confinement fusion (ICF) hohlraum. This work investigates the motion of the laser absorption cutoff position using low density foam gold walls. It is found that the motion of the laser absorption cutoff position can be significantly mitigated through optimal initial low density, tailored to a specific laser shape. For a short square laser pulse, the laser absorption cutoff position remains nearly stationary at an initial density of approximately 0.6 g cm−3. For a long-shaped laser pulse, the minimal motion of the laser absorption cutoff position is observed at an initial density of about 0.1 g cm−3. This approach allows for the adjustment of the symmetry of the hohlraum radiation source. The insights gained from this study serve as a crucial reference for optimizing hohlraum wall density.

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Foam Au driven by 4ω–2ω ignition laser pulse for inertial confinement fusion

Cited by 10 publications

References 44 publications

Demonstration of gold foam plasma as bright x-ray source and slow ion emitters

Demonstration of gold foam plasma as bright x-ray source and slow ion emitters

Summary of laser plasma physics sessions at the first AAPPS-DPP conference

Tamping the movement of the laser absorption cutoff position using gold foam hohlraum

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