NIF delivers 500 terawatts to fusion target

Livermore, CA--On July 5, the Lawrence Livermore National Laboratory's National Ignition Facility (NIF) achieved a historic record-breaking laser shot. The NIF laser system of 192 beams delivered more than 500 trillion watts (terawatts or TW) of peak power and 1.85 megajoules (MJ) of ultraviolet laser light to its target. 500 TW is 1,000 times more power than the United States uses at any instant in time, and 1.85 MJ of energy is about 100 times what any other laser regularly produces today.

Combining extreme levels of energy and peak power on a target in the NIF is a critical requirement for achieving one of physics' grand challenges--igniting hydrogen fusion fuel in the laboratory and producing more energy than that supplied to the target. In the historic test, NIF's 192 lasers fired within a few trillionths of a second of each other onto a 2 mm diameter target. The total energy matched the amount requested by shot managers to within better than 1%. In addition, the beam-to-beam uniformity was within 1%, making NIF not only the highest energy laser of its kind but the most precise and reproducible, according to LLNL. "NIF is becoming everything scientists planned when it was conceived over two decades ago," NIF director Edward Moses said. "It is fully operational, and scientists are taking important steps toward achieving ignition and providing experimental access to user communities for national security, basic science and the quest for clean fusion energy."

The user community agrees. "The 500 TW shot is an extraordinary accomplishment by the NIF Team, creating unprecedented conditions in the laboratory that hitherto only existed deep in stellar interiors," said Dr. Richard Petrasso, senior research scientist and division head of high energy density physics at the Massachusetts Institute of Technology. "For scientists across the nation and the world who, like ourselves, are actively pursuing fundamental science under extreme conditions and the goal of laboratory fusion ignition, this is a remarkable and exciting achievement."

NIF is operating routinely at unprecedented performance levels. The July 5 shot was the third experiment in which total energy exceeded 1.8 MJ on the target. On July 3 scientists achieved the highest energy laser shot ever fired, with more than 1.89 MJ delivered to the target at a peak power of 423 TW. A shot on March 15 set the stage for the July 5 experiment by delivering 1.8 MJ for the first time with a peak power of 411 TW.

Original concerns about achieving these levels of extreme laser performance on NIF centered in part on the quality of optics existing in the late 1990s that could not withstand this intense laser light. Lawrence Livermore researchers worked closely with their industrial partners to improve manufacturing methods and drastically reduce the number of defects. Livermore scientists also developed in-house procedures to remove and mitigate small amounts of damage resulting from repeated laser firings.

NIF is influencing the design of new giant laser facilities being built or planned in the United Kingdom, France, Russia, Japan and China.

Located at Lawrence Livermore National Laboratory, NIF is funded by the National Nuclear Security Administration (NNSA), a semi-autonomous agency within the U.S. Department of Energy responsible for enhancing national security through the application of nuclear science to the nation's national security enterprise.

NIF is the latest, and arguably the most sophisticated, addition to a number of critical stockpile stewardship facilities. It is the only facility with the potential to duplicate the actual phenomena that occur in the heart of a modern nuclear device--a goal that is critical to sustaining confidence that a return to underground nuclear testing remains unnecessary. NIF also is providing unique experimental opportunities for scientists to enhance our understanding of the universe by creating the same extreme states of matter that exist in the centers of planets, stars and other celestial objects. Additionally, experiments at NIF are laying the groundwork to revolutionize energy production with fusion energy to provide abundant and sustainable clean energy.

SOURCE: Lawrence Livermore National Laboratory;

IMAGE: A view of a cryogenically cooled NIF target as "seen" by the laser through the hohlraum's laser entrance hole. In ignition experiments, the hydrogen in the fuel capsule must be compressed to about 100 times the density of lead. (Courtesy Lawrence Livermore National Laboratory)

A view of a cryogenically cooled NIF target as "seen" by the laser through the hohlraum's laser entrance hole. In ignition experiments, the hydrogen in the fuel capsule must be compressed to about 100 times the density of lead

Most Popular Articles


Handheld Spectrometers

Spectroscopy can be a powerful measurement tool, and handheld spectrometers offer the ultimate in portability, so the instrument can be applied wherever meas...

Fracking, climate change, and lasers:  new tools to reduce fugitive methane emissions

This webcast, sponsored by Hamamatsu Corporation, covers recent developments and field deployments of compact quantum-cascade-laser (QCL)-based methane senso...

Opportunities in the Mid-IR

The technology for exploiting the mid-IR is developing rapidly:  it includes quantum-cascade lasers and other sources, spectroscopic instruments of many...

Fiber Optic Sensors – Fundamentals, Principles and Applications

In this webcast, sponsored by Nufern, we focus on optical fiber sensing technology.  Fundamental concepts will be presented first, followed by the under...
Technical Digests

HIGH-POWER FIBER LASERS: Working in the kilowatt regime

High-power materials-processing fiber lasers are available in an increasing variety of forms, as ...
Sponsored by

Click here to have your products listed in the Laser Focus World Buyers Guide.


P-series 1470nm to 1550 nm

Ultra-High Brightness Direct Diode Lasers 20W to 135W

T-Series 915nm, 940nm, or 976nm

Ultra-High Brightness Direct Diode Lasers 85W to 575W

PCB Laser Marking System

PCB Laser Marking Systems


Lighthouse Photonics Inc

Provides sealed, turn-key, cost-effective, diode-pumped solid-state (DPSS) lasers for s...

Fibertek Inc

Specializes in the design, development, manufacture, and testing of advanced diode-pump...

Control Micro Systems Inc

Offers laser marking, laser cutting, laser drilling and laser welding systems for a wid...

Social Activity

Copyright © 2007-2014. PennWell Corporation, Tulsa, OK. All Rights Reserved.PRIVACY POLICY | TERMS AND CONDITIONS