Illustration

Attoclock

LCLS attoclock illustration

In this illustration, ultrashort X-ray pulses (pink) at the Linac Coherent Light Source ionize neon gas at the center of a ring of detectors. An infrared laser (orange) sweeps the outgoing electrons (blue) across the detectors with circularly polarized light. Scientists read data from the detectors to learn about the time and energy structure of the pulses, information they will need for future experiments.

Terry Anderson/SLAC National Accelerator Laboratory

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Illustration of the LCSL "attoclock"