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Upgraded X-ray Laser Science: Capturing Electron Motion SLAC is home to the world’s most advanced X-ray laser, and following recent upgrades, scientists are now able to see how molecules evolve at the smallest, fastest scales imaginable, better than ever before. Jon Marangos and his team are at SLAC studying electron motion on an attosecond scale - a billionth of a billionth of a second. Taking advantage of the high-repetition rate of our X-ray pulses allows them to capture an electron’s precise

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