The M-band transmission flux of the plastic foil with a coated layer of silicon or germanium

Li, Liling; Zhang, Lu; Jiang, Shaoen; Guo, Liang; Qing, Bo; Li, Zhichao; Zhang, Jiyan; Yang, Jiawei; Ding, Yongkun

doi:10.1063/1.4864157

Cited by 10 publications

(2 citation statements)

References 22 publications

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“…The holhraum plays an important role in high energy density physics experiments [1][2][3], especially in laser indirect driven confinement fusion experiments [4][5][6]. A laser delivers energy to the high Z hohlraum, such as a gold hohlraum, and is converted to x-rays for the driving capsule.…”

Section: Introductionmentioning

confidence: 99%

Demonstration of enhancement of x-ray flux with foam gold compared to solid gold

et al. 2016

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Experiments have been conducted to compare the re-emission from foam gold with a 0.3 g cc−1 density and solid gold in a SGIII prototype laser facility. Measurements of the re-emission x-ray flux demonstrate that emission is enhanced by the low density foam gold compared to the solid gold under the same conditions. The emission fraction increases with time and is concentrated on soft x-ray flux between 0.1–1 keV. The simulation results with Multi 1D agree with the experimental results. There are potential advantages to using foam walls for improving the emission and soft x-ray flux in hohlraums.

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Section: Introductionmentioning

confidence: 99%

Demonstration of enhancement of x-ray flux with foam gold compared to solid gold

et al. 2016

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“…We have proposed a new method to choose a better target design by comparing the M-band transmission flux [13,25]. Because of the lower manufacturing capability to produce Si-doped HDC and W-doped HDC samples, we study the influence of buried depth on the transmission of M-band x-ray by burying a thin layer of Si or W at two different depths of HDC.…”

Section: Introductionmentioning

confidence: 99%

Optimization of tungsten-doped high density carbon target in inertial confinement fusion

Li¹,

Zhang²,

Jing³

et al. 2021

Nucl. Fusion

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A tungsten (W)-doped high density carbon (HDC) target is a promising design for an ignition target in inertial confinement fusion (ICF). The influence of silicon (Si) and W on the transmission of M-band x-ray has been studied by experiment. With a radiation temperature of ∼200 eV, the transmitted M-band x-ray (1.6–4.4 keV) flux and spectrum of Si or W-buried HDC sample were measured by M-XRDs and TGS, respectively. The thin layer of Si or W was buried at two different depths (2.1 μm and 11 μm). Results show that M-band transmission flux of Si-buried HDC sample decreases with buried depth (bd). However, bd does not influence that of the W-buried HDC sample. The one-dimensional simulation result is consistent with the experimental result. In the 1D simulation, the Au M-band (2–5 keV) transmission flux of Si-buried HDC also decreases with bd. However, the Au M-band transmission flux of W-buried HDC increases at first and then decreases. This is mainly due to the different characteristics of Si and W opacity. Especially as the peak radiation temperature reaches 260 eV, W can still absorb the M-band x-ray efficiently as it is buried near the radiation source. Based on these studies, an optimized W-doped HDC target with low doped fraction and mass has been proposed in this paper.

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Influence of Au M-band flux asymmetry on implosion symmetry

Jiang

Jing

et al. 2017

Laser Part. Beams

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In indirect-drive inertial confinement fusion, the radiation symmetry must be controlled for the achievement of hotspot ignition. The radiation symmetry is of great importance. In this paper, we investigate the drive asymmetry of the M-band (2–5 keV) radiation emitted from an Au holhraum wall by using the three-dimensional view-factor code IRAD3D. Analysis of the M-band flux drive at the Shenguang-III laser facility shows that it is asymmetric and that the asymmetry varies with time. For a given cross section over the pole, the initial M-band flux asymmetries are P2 = 11.59, P4 = 1.41, and P6 = −0.64%. When the asymmetries are artificially added to a symmetric radiation drive, the position of the deuterium-tritium (DT) ice/gas interface is asymmetric for a National Ignition Facility capsule in 1D simulation. This means that M-band flux asymmetry can lead to implosion asymmetry even if the total radiation is symmetric. Pure CH and Si-doped CH capsules are considered. The results show that a mid-Z dopant can partly reduce the asymmetry. However, the asymmetry is still very large. Thus, it is necessary to study the M-band flux asymmetry and its influence on the implosion symmetry.

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The M-band transmission flux of the plastic foil with a coated layer of silicon or germanium

Cited by 10 publications

References 22 publications

Demonstration of enhancement of x-ray flux with foam gold compared to solid gold

Demonstration of enhancement of x-ray flux with foam gold compared to solid gold

Optimization of tungsten-doped high density carbon target in inertial confinement fusion

Influence of Au M-band flux asymmetry on implosion symmetry

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