LCLS SASE v. Seeded Pulse

Image - Two side by side spectrographs showing regular and seeded laser pulses

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August 13, 2012

The LCLS’s new self-seeding improvements yield laser pulses focused to higher intensity in a much narrower band of X-ray wavelengths, as you can see in these spectrographs comparing a normal SASE (self-amplified spontaneous emission) pulse (left) and a seeded one (right). The results promise to speed research discoveries and may enable experiments that have never before been possible.

Graph from J. Amman, et al. adapted by Greg Stewart, SLAC National Accelerator Laboratory