I’ve fired one of America’s most powerful lasers—here’s what a shot day looks like
Summary
The Texas Petawatt (TPW) is one of the most powerful lasers in the United States, located underground at the University of Texas at Austin. It was used by scientists from around the country to conduct research in physics, fusion energy, and medical treatments before closing due to funding cuts.Key Facts
- TPW is housed two floors below ground in a building at the University of Texas at Austin.
- The laser produces extremely powerful light pulses that last only a trillionth of a second.
- These pulses can have more power than the entire U.S. electrical grid during that brief moment.
- Scientists use TPW to study topics like star interiors, fusion energy, and cancer treatment methods.
- A typical “shot day” involves careful preparation, alignment, and testing before firing the laser briefly.
- The laser amplifies a tiny initial light pulse through several stages using glass rods and disks plus flash lamps.
- Maintaining perfect alignment during the process is critical to avoid damaging the expensive optics.
- TPW was part of LaserNetUS, a Department of Energy network of high-power laser labs, but is now closed due to funding cuts.
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