US Scientists Achieve Second Net Energy Gain in Nuclear Fusion Breakthrough

In a significant step forward for the field of nuclear fusion, US scientists at the Lawrence Livermore National Laboratory in California have achieved a second instance of net energy gain in a fusion reaction, with an even higher energy yield. 

The breakthrough comes on the heels of the laboratory’s initial demonstration of fusion ignition in December 2022, a feat that marked a historic milestone in the quest for practical fusion energy. 

“Since demonstrating fusion ignition for the first time at the National Ignition Facility in December 2022, we have continued to perform experiments to study this exciting new scientific regime,” said Paul Rhien, a spokesperson for the laboratory.

During an experiment conducted on July 30, the team managed to replicate the ignition achieved previously, but with a notable improvement in energy output. While a detailed analysis of the results is still ongoing, it has been confirmed that the experiment yielded a higher energy output compared to the previous December test.

According to initial data first reported by the Financial Times citing people familiar with the matter, the July experiment had an energy output greater than 3.5MJ — or equivalent to the energy needed to power a household iron for an hour.

Experts emphasize that there are significant challenges to overcome before nuclear fusion can become a commercially viable energy source. Researchers must tackle various scientific, technical, and financial obstacles to make fusion power a practical reality.

The concept of energy gain in this context solely compares the energy produced to that utilized by the lasers, not the total energy drawn from the grid to operate the system, which is substantially higher. 

Experts estimate that successful commercial fusion reactions should generate between 30 to 100 times the energy of the lasers. Additionally, the National Ignition Facility (NIF) presently conducts a maximum of one fusion attempt per day, while a functional internal confinement power plant would need to perform multiple shots per second.

Despite these hurdles, the improved outcomes achieved at the NIF within just eight months of the initial milestone signify an accelerated pace of advancement. 

Rhien added that they will share their findings at forthcoming scientific conferences and through peer-reviewed publications, underscoring their commitment to transparency and collaboration in this groundbreaking field. 


Information for this story was found via the Financial Times, and the sources and companies mentioned. The author has no securities or affiliations related to the organizations discussed. Not a recommendation to buy or sell. Always do additional research and consult a professional before purchasing a security. The author holds no licenses.

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