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Nuclear Fusion

Nuclear Fusion

The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...

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相关实验视频

Updated: Aug 17, 2025

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses

Published on: July 2, 2012

爆炸标志激光聚变突破

Science (New York, N.Y.)

|December 15, 2022

概括

此摘要是机器生成的。

国家点火设施在核聚变反应中实现了净能量增长. 然而,开发商业化核聚变发电厂仍面临重大长期挑战.

科学领域:

核聚变能源研究
惯性封闭融合

背景情况:

国家点火设施 (NIF) 已经成功地证明了惯性封闭核聚变 (ICF) 的净能量增益. 这一里程碑标志着核聚变发电的科学进步.

研究的目的:

报告国家点火设施的净能效益.
评估这一里程碑对核聚变能源未来的影响.
提供有关商业核聚变电力剩余挑战的背景.

主要方法:

使用高功率激光的惯性封闭融合方法.
详细的诊断来测量输出和输入的能量.
对实验数据进行分析以确认能量平衡.

主要成果:

证明了核聚变反应产生的能量超过了目标.
达到了关键值的点火.
量化了在特定的实验设置中获得的能量增益.

结论:

NIF的结果是核聚变研究的重大科学突破.
由于工程和经济上的障碍, 核聚变发电商业化仍是一个遥远的前景.
在材料科学,反应堆设计和持续运行方面需要进一步的进步.

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Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

$Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing$

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing

Published on: April 25, 2019

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Last Updated: Aug 17, 2025

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses

Published on: July 2, 2012

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

$Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing$

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing

Published on: April 25, 2019