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 Ideas Lab podcast takes listeners inside that work and its role in supporting national security. Listen on Apple or Spotify.

From the earliest use of energetic materials centuries ago to today’s advanced experiments and simulations, the episode traces how researchers are working to better understand, predict and control explosive behavior. That understanding strengthens the nation’s nuclear deterrent and helps address evolving threats.

“Energetic materials are anything that releases their energy quickly,” said Lara Leininger, director of the EMC. “Our job is to underpin strategic deterrence with the science, engineering and technology that gives confidence in a safe, secure and reliable deterrent.”

Much of that science happens inside the High Explosives Application Facility (HEAF), a one-of-a-kind research and testing facility designed to safely contain explosive experiments while capturing precise data. Inside HEAF, researchers can conduct experiments with up to 10 kilograms of high explosives, all within a structure engineered to absorb and contain the blast.

“You could be standing outside the building and not know that they are detonating explosives inside,” Leininger said.

Within HEAF, scientists and engineers work side-by-side, combining experimental data with advanced diagnostics that measure pressure, temperature and velocity in real time. This integration allows teams to study how detonations propagate through materials and refine predictive models.

When experiments require greater scale, the work extends beyond Livermore to Site 300, LLNL’s remote experimental test site located about 15 miles east of the main Laboratory. There, researchers can conduct experiments at significantly greater scales, including experiments up to 60 kilograms, within reinforced containment structures designed to protect both people and the environment.

Together, these facilities allow researchers to study explosive behavior across a wide range of conditions, from barely visible samples to large-scale detonations, all while maintaining strict safety controls.

The EMC serves as LLNL’s hub for expertise in explosives science, bringing together chemists, physicists, engineers and computational scientists to tackle complex challenges that span multiple fields.

“Energetic materials are a multidisciplinary subject,” said Alex Gash, EMC deputy director. “You have to know a little bit about a lot of things, and it takes time to build that expertise.”

That expertise is applied across scales, from less than 10 milligrams of material to full-scale experiments, helping researchers track how chemical reactions evolve into detonation.

High-performance computing systems, including El Capitan, allow researchers to simulate explosive behavior, reduce the number of physical tests and improve predictive accuracy. Robotics and automation further enhance consistency and safety.

The work also extends beyond the Laboratory. EMC collaborates with partners across the Department of Energy enterprise, other national laboratories, industry and federal agencies to develop technologies that support national security and public safety, including tools for explosive detection and rapid identification.

“At EMC, we can look at things from different perspectives because everyone has a seat at the table,” Leininger said. “That allows us to tackle complex problems and deliver solutions for the country.”

While decades of research have advanced understanding of energetic materials, key questions remain, particularly in the earliest moments of detonation.

“We’ve learned a lot through trial and error,” Gash said. “And there’s still quite a bit left to learn.”

Listen to the full episode to learn how LLNL researchers are using world-class facilities, advanced computing and multidisciplinary expertise to reduce risk, strengthen national security and better understand and control one of nature’s most extreme phenomena. Listen on Apple or Spotify.