LCLS-II Design & Performance
Working closely with DOE’s Office of Science, SLAC configured LCLS-II to meet requirements laid out by the Basic Energy Sciences Advisory Committee (BESAC). The conceptual design:
- Adds a new, 4 GeV superconducting linac in an existing SLAC tunnel, avoiding the need for excavation.
- Increases the repetition rate from 120 pulses per second to 1 million per second. It will be the world’s only X-ray free-electron laser capable of supplying a uniformly-spaced train of pulses with programmable repetition rate.
- Provides a tunable source of X-rays, by replacing the existing undulator (used to generate X-ray laser pulses) with two new ones. This ability to tune the X-ray energy on demand will enable scientists to scan across a wide spectrum – opening up new experimental techniques and making efficient use of the valuable beam time.
- Provides access to an intermediate X-ray energy range that is currently inaccessible with LCLS, but which is likely critical for studies of new materials, chemical catalysis and biology.
- Extends the operating range of the facility from its current limit of ~11 keV X-rays to ~25 keV.
- Supports the latest seeding technologies to provide fully coherent X-rays (at the spatial diffraction limit and at the temporal transform limit)
- Maintains the existing copper-based warm linac and upgrades parts of the existing research infrastructure to take advantage of the new configuration.
Read more in the news feature Major Upgrade Will Boost Power of World’s Brightest X-ray Laser