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Nuclear deterrence

A complex system of cooling towers, chillers, pumps, heat exchangers, sensors and more than 2,000 feet of pipes all work together to remove heat from the liquid-cooled exascale supercomputer El Capitan. Graphic: Dan Herchek.

Meet the machines that matter: How El Capitan keeps its cool

LLNL tackles the nation’s toughest security challenges through bold, multidisciplinary science powered by advanced facilities and instruments. In this four-part series, meet the machines that work behind the scenes at the Laboratory to drive discovery, push boundaries and enable excellence. From inspecting optics and trapping ions to cooling supercomputers and detecting…

Lawrence Livermore National Laboratory and Strategic Deterrence leaders gather at Site 300 during the site’s 70th anniversary Open House celebration (Photo by Randy Wong).

Site 300 marks 70 years with employee appreciation event, open house

Lawrence Livermore National Laboratory (LLNL) marked Site 300’s 70th anniversary in May with two events celebrating the Experimental Test Site’s history, mission and people: an Employee Appreciation Day and a family-focused open house. Although Site 300 reached its 70-year milestone last fall, celebrations were delayed due to a lapse in federal government funding. The…

The Electron Beam Ion Trap works like a scalpel, isolating the emission from a single ion species or probing specific atomic processes with surgical precision. (Graphic: Dan Herchek)

Meet the machines that matter: the Electron Beam Ion Trap

Imagine listening to an orchestra: overlapping notes, blended timbres and complex harmonies coming together into a cohesive symphony. Now try to isolate a single instrument and the sounds it produces. Nearly impossible, right? The same is true for collections of ions, charged particles that have gained or lost electrons. Each ion — from hydrogen to lithium to lead and…

As hydrogen reacts with uranium, it creates blisters (a) that burst (b) and release uranium hydride powder. The interaction results in surface degradation (c) that can impact material safety and lifetime.

Roll the tape: LLNL captures inception of hydrogen-uranium reaction for the first time

When hydrogen gas interacts with uranium metal, the combination creates a chemically reactive powder and a runaway reaction that is difficult to stop. The result can impact the safety and lifespan of technology critical for fusion energy, hydrogen storage and nuclear fuels. In a recent study published in npj Materials Degradation, researchers from Lawrence Livermore…

Mike May served as the fifth director of Lawrence Livermore National Laboratory from 1965 to 1971.

Michael May, visionary LLNL director and arms control leader, dies at 100

Michael M. May, the fifth director of Lawrence Livermore National Laboratory (LLNL) and a pioneering physicist who shaped the nation’s nuclear deterrence strategy and arms control policy for more than half a century, died on May 17. He was 100. A World War II veteran, theoretical physicist, and trusted scientific adviser to multiple U.S. administrations, May’s influence…

FODI at work inspecting an optic between experiments at the National Ignition Facility. Image by Daniel Herchek/LLNL

Meet the machines that matter: the Optics Inspector

LLNL tackles the nation’s toughest security challenges through bold, multidisciplinary science powered by advanced facilities and instruments. In this new series, meet the machines that work behind the scenes at the Laboratory to drive discovery, push boundaries and enable excellence. From inspecting optics and trapping ions to cooling supercomputers and detecting…

Big Ideas Lab genesis mission graphic

Big Ideas Lab explores how the Genesis Mission aims to accelerate scientific discovery

Scientific discovery has always moved through a familiar cycle: question, hypothesis, experiment and a result. In the latest episode of the Big Ideas Lab podcast, Lawrence Livermore National Laboratory (LLNL) explores how the Department of Energy’s (DOE) Genesis Mission aims to accelerate that process by uniting AI, high-performance computing (HPC), experiments and the…

On May 7, Lawrence Livermore National Laboratory (LLNL) Director Kim Budil, fourth from left, joined a public-private panel on AI for science, where she highlighted LLNL capabilities and AI focus areas, including the National Ignition Facility, El Capitan, high-fidelity modeling and simulation and advanced materials and manufacturing. (Photo: Jeremy Thomas)

LLNL showcases AI-enabled science, national security and energy innovation at AI+ Expo

Lawrence Livermore National Laboratory (LLNL) leaders, scientists and engineers joined national voices at the Special Competitive Studies Project’s (SCSP) AI+ Expo May 7-9 in Washington, D.C., highlighting how AI is reshaping science, security and energy innovation. The public Expo brought together government, industry, academic and Department of Energy (DOE) national…

LLNL's Dan Casey speaks with US IFE conference attendees

LLNL experts help advance inertial fusion energy at U.S. IFE conference

Researchers from Lawrence Livermore National Laboratory (LLNL) joined their counterparts from national laboratories, universities, industry and government in a conference last month to discuss the progress, challenges and priorities for moving toward an inertial fusion energy (IFE) future in the United States. The U.S. IFE conference brought together the growing IFE…

Adding an optimized void structure (top right) counteracts a shockwave-induced instability, reducing jetting (bottom right) that can interfere with inertial confinement fusion. Without this void, significant jetting occurs (bottom left). (Image: Strucka et al.)

Looking into the void to cancel out material instabilities

Picture two materials sandwiched together. The boundary between them may appear flat, but, in reality, it is full of tiny bumps and dents. Suddenly, the materials are hit with a shockwave. If that wave hits a bump in the material interface, it slows down. If it hits a dent, it accelerates forward. This imbalance creates fast, narrow jets of material — called the Richtmyer…

Lawrence Livermore National Laboratory has announced five research teams selected for awards through the Lab’s FY26 Academic Collaboration Team annual call for proposals.

Weapons Physics & Design ACT awards drive university partnerships and research

Lawrence Livermore National Laboratory (LLNL) has announced five research teams selected for awards through the Lab’s FY26 Academic Collaboration Team (ACT) annual call for proposals. Awards support university research partners for up to three years to perform research in collaboration with Lab scientists and offer an important way to build long-term connections with…

Big Ideas Lab podcast is marking a new milestone with the release of its 50th episode

All 50 episodes of the Big Ideas Lab now available on LLNL podcast page

Lawrence Livermore National Laboratory’s (LLNL) Big Ideas Lab podcast marks a new milestone with the release of its 50th episode. The latest episode, delving into high-performance computing for energy innovation, can be found alongside the entire series on the new LLNL podcast page. Since its debut in September 2024, the Big Ideas Lab has aimed to rethink how science…

Scientists from Lawrence Livermore National Laboratory are partnering with San Francisco Bay Area fusion energy startup Inertia Enterprises Inc. to advance fusion laser technology

LLNL partners with Inertia to develop fusion energy technology

Scientists from Lawrence Livermore National Laboratory (LLNL) are partnering with San Francisco Bay Area fusion energy startup Inertia Enterprises Inc. to advance fusion laser technology, as well as inertial fusion target manufacturing and designs. This collaboration is an expansive and integrated private sector-led partnership, unique in the history of LLNL and the DOE…

The Enhanced Fusion Yield Capability project will increase the laser energy available to LLNL’s National Ignition Facility

NNSA and LLNL advance laser upgrade for nuclear stockpile mission ahead of schedule

The U.S. Department of Energy (DOE) and National Nuclear Security Administration (NNSA) have approved a path forward for a project that will increase the laser energy available to the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL). This advancement was expedited by key regulatory changes made in March 2025 by U.S. Secretary of Energy…

The magnetic microcalorimetry team operates a dilution refrigerator used for ultra-sensitive magnetic microcalorimetry. Their work enables the precise measurement of nuclear decay events at extremely low temperatures. From left to right: Inwook Kim, Chang Lee, Geon-Bo Kim (corresponding author), Ryan Wood (first author) and Nathan Hines.

Cryogenic micro-calorimetry offers a novel material-dating method for nuclear forensics and safeguards

The moment nuclear material is produced, processed or purified, it sets off a hidden countdown, marked by the half-life of its radioactive atoms as they begin to decay. For scientists tracking the origins of these substances, decoding this natural clock is crucial for verifying material histories in support of global security efforts. In a new study published in the…

Robert Maxwell has been recognized as a fellow of the American Association for the Advancement of Science. (Photo by Randy Wong)

LLNL’s Robert Maxwell selected as 2025 AAAS Fellow

Robert S. Maxwell, Strategic Deterrence (SD) program director for Materials and Manufacturing Transformation, was elected a fellow of the American Association for the Advancement of Science (AAAS) in recognition of nearly three decades of leadership and significant contributions in materials chemistry related to national security. “I am incredibly honored and humbled by…

Big Ideas Lab energetic materials podcast graphic

Big Ideas Lab podcast explores energetic materials and the science behind explosive performance

In less than a millionth of a second, a high explosive can release its energy, generating pressures and temperatures that push materials to their limits. At Lawrence Livermore National Laboratory (LLNL), scientists in the Energetic Materials Center (EMC) study these extreme conditions using experiments, computation and specialized facilities. The latest episode of the Big…

Wren Carr, a new SPIE Fellow, has dedicated his career to optics at the National Ignition Facility. Photo by Blaise Douros.

LLNL optics expert Wren Carr named SPIE Fellow

Lawrence Livermore National Laboratory’s (LLNL) Wren Carr was recently selected as a Fellow of SPIE, the international society for optics and photonics. He is the science and technology group leader for National Ignition Facility (NIF) laser-induced damage and mitigation science. “I feel honored to be recognized by SPIE for my leadership, mentorship and technical…

The 2026 DMTS cohort is pictured here

LLNL honors 36 as 2026 Distinguished Members of Technical Staff

Thirty-six Lawrence Livermore National Laboratory (LLNL) researchers have been named Distinguished Members of Technical Staff (DMTS) in recognition of their extraordinary scientific and technical contributions, as affirmed by their professional peers and the broader scientific community. As distinguished citizens of the Laboratory and their respective fields, DMTS honorees…

Big Ideas Lab NIF target fabrication

Big Ideas Lab podcast zooms in on tiny targets

At the end of an inertial confinement fusion (ICF) experiment at Lawrence Livermore National Laboratory’s National Ignition Facility (NIF), the target, measuring just two centimeters, is mostly obliterated. The gold plating, the high-density carbon and months of meticulous assembly vanish in an instant. That’s the point. In that flash, the target becomes what NIF is built…