Big Ideas Lab Energetic Materials
Mar 24, 2026
Lara Leininger, director overseeing LLNL's energetic materials research hub. Alex Gash, deputy director and technical lead on detonation physics and experiments. They explore molecule-to-megascale science, how detonations behave under extreme conditions, advanced testing facilities and diagnostics, exascale simulations, robotics for consistent materials prep, rapid field ID tools, and cross-lab collaborations.
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Bamboo Fire Sparked Early Explosive Curiosity
- Ancient Chinese villagers discovered a sudden blast when bamboo stalks heated and ruptured in a fire.
- The example traces energetic-material curiosity from accidental bamboo explosions to centuries of experimentation leading to gunpowder.
Detonation Is A Shockwave Sustained By Chemistry
- Detonation is a shockwave-driven bulk phenomenon where chemistry must sustain or accelerate the shock to propagate.
- Alex Gash explains shockwaves move faster than sound, generate gigapascal pressures and ~4,000 K temperatures, and drive reactions at kilometers-per-second speeds.
The Reaction Zone Holds Unanswered Chemistry
- The reaction zone — the first microseconds behind a shock front — remains poorly understood and is a central research target.
- Alex Gash highlights that key chemistry products are only stable for very short times, requiring extreme experiments to observe them.