Over the past decade, the 3-km electron-positron linear accelerator at SLAC has been transformed from a 50-GeV particle-physics machine to a driver for x-ray free-electron lasers. LCLS, the world’s first hard-x-ray FEL, began operation in 2009 using the third km of the linac. The other 2 km had been used until earlier this year by FACET, a user facility primarily for studies of wakefield acceleration of electrons and positrons. The first km has now been totally removed to prepare for LCLS-2, which will replace the 120-Hz copper room-temperature linac with a 1-MHz superconducting machine. LCLS and LCLS-2 will offer users a wide choice of x-ray energies, from 200 eV to 25 keV. The middle kilometer will become FACET-2. At much longer wavelengths, the high-energy electrons of LCLS and FACET have generated intense (mJ) pulses of terahertz radiation. I will outline an idea for a THz-pump x-ray-probe configuration at the high repetition rate of LCLS-2, by transporting the THz 100 m to the user hutches.
From X-Ray Lasers to Terahertz: Electron-Beam-Driven Radiation Sources at SLAC
|place:||ANKA seminar room, building 348, 2nd floor||Affiliation:||
SLAC National Accelerator Laboratory
Markus Schwarz, KIT - LAS