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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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Related Experiment Video

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

Explosion marks laser fusion breakthrough.

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|December 15, 2022

Summary

This summary is machine-generated.

The National Ignition Facility achieved a net energy gain in fusion reactions. However, developing commercial fusion power plants still faces significant long-term challenges.

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Last Updated: Aug 17, 2025

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses

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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

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Area of Science:

Fusion energy research
Inertial confinement fusion

Background:

The National Ignition Facility (NIF) has successfully demonstrated net energy gain from inertial confinement fusion (ICF). This milestone signifies a crucial scientific advancement in harnessing fusion power.

Discussion:

Achieving net energy gain is a landmark scientific achievement, validating decades of research in ICF. This breakthrough provides critical data for future fusion energy development.

Key Insights:

NIF's experiment produced more energy from fusion than the laser energy delivered to the target. This result is a pivotal moment for fusion science.

Outlook:

While NIF's success is significant, substantial engineering and economic hurdles must be overcome for commercial fusion power. Future research will focus on improving efficiency and developing sustainable reactor designs.