LCLS SASE v. Seeded Pulse (IMAGE) DOE/SLAC National Accelerator Laboratory Caption 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. Credit Graph from J. Amman, et al. adapted by Greg Stewart, SLAC National Accelerator Laboratory Usage Restrictions Credit required License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.