Experimental progress of inertial confinement fusion based at the ShenGuang-III laser facility in China

Jiang, Shaoen; Wang, Feng; Ding, Yongkun; Liu, Shenye; Yang, Jiamin; Li, Sanwei; Huang, Tianxuan; Cao, Zhurong; Yang, Z. H.; Hu, Xiangming; Miao, Wenyong; Zhang, Jiyan; Wang, Zhebin; Gao, Yang; Yi, Rongqing; Tang, Qi; Kuang, Longyu; Li, Zhichao; Yang, Dong; Zhang, Baohan

doi:10.1088/1741-4326/aabdb6

Cited by 53 publications

(17 citation statements)

References 51 publications

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“…However, the laser width is larger, and there is no fiber bunch. The gain uniformity measurement is charactered at the SG-III laser facility [14]. The whole camera is mounted on a diagnostic instrument manipulator at the SG-III laser facility.…”

Section: Performance Measurementmentioning

confidence: 99%

X-Ray Imager With a 20 mm Width Microstrip Line for the Extreme Ultraviolet Spectrometer

Cai

Deng

et al. 2019

IEEE Access

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A time-resolved x-ray imager based on the gated microchannel plate (MCP) technology is reported. The single MCP microstrip line with a width of 20 mm is formed to improve the spatial resolving capability. The microstrip line cathode coated on the MCP is driven by four gating pulses simultaneously. Each gating pulse has an amplitude of −1.7 kV and a width of 160 ps. The temporal resolution of the imager is demonstrated by utilizing an ultraviolet (UV) laser pulse and a fiber bunch optics. A measured temporal resolution of 68 ps is achieved, while the photocathode is applied with the four gating pulses plus a-200 V DC bias. Moreover, the gain uniformity of the imager is charactered at the Shenguang-III (SG-III) laser facility. An x-ray with 3 ns width is used to irradiate the microstrip line cathode uniformly. Then, the gating pulses travel along the microstrip line cathode with a gradually reduced amplitude, which lead to a decreasing gain. The measured results show that the MCP gain is dropped to 30% along the gating pulse traveling direction, and a perpendicular gain variation of 4% is obtained. INDEX TERMS X-ray imager, gated microchannel plate, temporal resolution, gain uniformity.

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Section: Performance Measurementmentioning

confidence: 99%

X-Ray Imager With a 20 mm Width Microstrip Line for the Extreme Ultraviolet Spectrometer

Cai

Deng

et al. 2019

IEEE Access

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“…Inertial confinement fusion driven by laser sources is one of the main ways to achieve controllable nuclear fusion [1]. As a vital device for achieving nuclear fusion, Final Optics Assembly contains a considerable volume and complex structure with high requirements for manufacturing, assembly, and control precision.…”

Section: Introductionmentioning

confidence: 99%

Spatial sputtering of fused silica after a laser-induced exploding caused by a 355 nm nd: YAG laser

Zhang

Dong

et al. 2022

Front. Phys.

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To alleviate laser-induced threats in the high-power laser systems, it is necessary to understand the debris propagation process and distribution characteristics, then take protection and cleaning strategies to sustain an ultra-clean environment. This work presents an experimental investigation of the sputtering behaviors of the laser-induced fused silica debris to clarify their longitudinal propagation and bottom distribution on the millimeter scale. Two types of polished surfaces with more than three orders of magnitude differences in surface roughness were adopted. The result reveals the centralized/decentralized distribution and the ability of long-range movement of debris propelled by the melting and mechanical failure. The maximum largest dispersion angle (LDA) appears at 18J/cm2 for debris within 10–20 μm from the Two Sides polished surface; debris <30 μm dominate the major quantity in the longitudinal propagation, and their centralization ability profoundly relies on the laser fluence and the surface roughness of the target; the diameter of the debris with long-range movement generally below 20 μm. This study could guide for establishing the overall dynamic cleaning strategy inside the high-power laser systems.

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“…Thus, the 8 ± 0.39-keV monochromatic X-rays emitted by the hotspot were quantitatively measured with 5- m spatial resolution using an eight-image KB microscope 15 and, for the first time, without the impacts from the diagnosis system response. This was achieved in implosion experiments performed at the 100 kJ laser facility of China 16 , 17 . Several characteristics of the hotspot, such as the number distributions of the monochromatic photon, geometrical profile, and dimension, were observed accurately.…”

Section: Introductionmentioning

confidence: 99%

Quantitative observation of monochromatic X-rays emitted from implosion hotspot in high spatial resolution in inertial confinement fusion

Ren

Dong

et al. 2021

Sci Rep

Self Cite

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In inertial confinement fusion, quantitative and high-spatial resolution ($$< 10\,\upmu $$ < 10 μ m) measurements of the X-rays self-emitted by the hotspot are critical for studying the physical processes of the implosion stagnation stage. Herein, the 8 ± 0.39-keV monochromatic X-ray distribution from the entire hotspot is quantitatively observed in 5-$$\upmu $$ μ m spatial resolution using a Kirkpatrick–Baez microscope, with impacts from the responses of the diagnosis system removed, for the first time, in implosion experiments at the 100 kJ laser facility in China. Two-dimensional calculations along with 2.5% P2 drive asymmetry and 0.3 ablator self-emission are congruent with the experimental results, especially for the photon number distribution, hotspot profile, and neutron yield. Theoretical calculations enabled a better understanding of the experimental results. Furthermore, the origins of the 17.81% contour profile of the deuterium-deuterium hotspot and the accurate Gaussian source approximation of the core emission area in the implosion capsule are clarified in detail. This work is significant for quantitatively exploring the physical conditions of the hotspot and updating the theoretical model of capsule implosion.

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Experimental progress of inertial confinement fusion based at the ShenGuang-III laser facility in China

Cited by 53 publications

References 51 publications

X-Ray Imager With a 20 mm Width Microstrip Line for the Extreme Ultraviolet Spectrometer

X-Ray Imager With a 20 mm Width Microstrip Line for the Extreme Ultraviolet Spectrometer

Spatial sputtering of fused silica after a laser-induced exploding caused by a 355 nm nd: YAG laser

Quantitative observation of monochromatic X-rays emitted from implosion hotspot in high spatial resolution in inertial confinement fusion

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