July 2025 Mechanical Engineering Blog
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July 9, 2025
U.S. Lab Achieves Record-Breaking Electron Beam, Opening New Frontiers in Science
U.S. Lab Achieves Record-Breaking Electron Beam, Opening New Frontiers in Science
Scientists at the SLAC National Accelerator Laboratory in Menlo Park, California, have created the most powerful electron beam ever recorded. Achieving a peak current five times stronger than any previous beam, this breakthrough represents a new benchmark in accelerator physics and holds wide-reaching implications for fields like astrophysics, quantum chemistry, and plasma science.
Historically, efforts to boost electron beam power have been hindered by quality loss due to conventional microwave-based compression methods. SLAC researchers overcame this by employing a novel laser-based shaping technique, successfully compressing billions of electrons into a beam just one micrometer long and without compromising beam integrity.
At the heart of the innovation was the use of a laser heater undulator, which allowed for unprecedented control over beam energy. “The big advantage of using a laser is that we can apply an energy modulation that’s much more precise than what we can do with microwave fields,” explained Claudio Emma, a SLAC staff scientist. Months of fine-tuning ensured the beam’s stability as it traveled through the lab’s one-kilometer-long accelerator.
This powerful beam is already enabling new scientific explorations. In astrophysics, it allows researchers to replicate and study plasma filaments found in stars. It also supports the development of compact particle accelerators through plasma wakefield research.
As Emma notes, “If you need an extreme beam, we have the tool for you.” Learn more about this topic here.
Historically, efforts to boost electron beam power have been hindered by quality loss due to conventional microwave-based compression methods. SLAC researchers overcame this by employing a novel laser-based shaping technique, successfully compressing billions of electrons into a beam just one micrometer long and without compromising beam integrity.
At the heart of the innovation was the use of a laser heater undulator, which allowed for unprecedented control over beam energy. “The big advantage of using a laser is that we can apply an energy modulation that’s much more precise than what we can do with microwave fields,” explained Claudio Emma, a SLAC staff scientist. Months of fine-tuning ensured the beam’s stability as it traveled through the lab’s one-kilometer-long accelerator.
This powerful beam is already enabling new scientific explorations. In astrophysics, it allows researchers to replicate and study plasma filaments found in stars. It also supports the development of compact particle accelerators through plasma wakefield research.
As Emma notes, “If you need an extreme beam, we have the tool for you.” Learn more about this topic here.
July 20, 2025
AI-Engineered Gliders Offer a New Wave of Underwater Exploration
AI-Engineered Gliders Offer a New Wave of Underwater Exploration
At the bottom of a pool on MIT’s campus, researchers are testing two curious underwater gliders, neither powered by motors nor inspired by traditional marine life. Instead, these innovative vehicles were conceived almost entirely by artificial intelligence.
Developed by MIT and the University of Wisconsin-Madison, the gliders are among the first autonomous underwater vehicles (AUVs) co-designed by a machine-learning system. Rather than imitating fish or marine mammals, the AI system generated entirely new forms optimized for one thing, efficiency. By focusing on lift-to-drag ratios an essential metric for energy-efficient movement, the AI created unique gliders that outperform conventional torpedo-shaped designs.
Key to this breakthrough is a neural network trained on 20 base shapes, including whales, sharks, and submarines. The AI then used a “deformation cage” to morph these into hundreds of novel variations. Two top-performing models were 3D printed and tested, one with two wings and another with four. In water trials, the two-winged glider achieved a lift-to-drag ratio of 2.5, far surpassing previous benchmarks.
Each glider includes a standard internal tube containing a buoyancy engine and mass-shifting system, allowing precise depth and angle control without motors. This minimal-energy approach mirrors how marine animals glide through the sea.
While current limitations include difficulty with thin shapes and small design imperfections, researchers aim to close the gap between simulation and reality. The ultimate goal? A future where scientists input mission parameters into software, and an AI generates a mission-ready, custom glider ready to explore the oceans. Learn more about this topic here.
Developed by MIT and the University of Wisconsin-Madison, the gliders are among the first autonomous underwater vehicles (AUVs) co-designed by a machine-learning system. Rather than imitating fish or marine mammals, the AI system generated entirely new forms optimized for one thing, efficiency. By focusing on lift-to-drag ratios an essential metric for energy-efficient movement, the AI created unique gliders that outperform conventional torpedo-shaped designs.
Key to this breakthrough is a neural network trained on 20 base shapes, including whales, sharks, and submarines. The AI then used a “deformation cage” to morph these into hundreds of novel variations. Two top-performing models were 3D printed and tested, one with two wings and another with four. In water trials, the two-winged glider achieved a lift-to-drag ratio of 2.5, far surpassing previous benchmarks.
Each glider includes a standard internal tube containing a buoyancy engine and mass-shifting system, allowing precise depth and angle control without motors. This minimal-energy approach mirrors how marine animals glide through the sea.
While current limitations include difficulty with thin shapes and small design imperfections, researchers aim to close the gap between simulation and reality. The ultimate goal? A future where scientists input mission parameters into software, and an AI generates a mission-ready, custom glider ready to explore the oceans. Learn more about this topic here.
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