1. Soft x-ray seeding studies for the SLAC Linac Coherent Light Source II
- Author
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Daniel Ratner, Gabriel Marcus, Robert W. Schoenlein, R. Coffee, Georgi L. Dakovski, Tor Raubenheimer, W. M. Fawley, Zhirong Huang, Erik Hemsing, Jerome B. Hastings, and Gregory Penn
- Subjects
Physics ,Nuclear and High Energy Physics ,Brightness ,Physics and Astronomy (miscellaneous) ,010308 nuclear & particles physics ,business.industry ,Free-electron laser ,Surfaces and Interfaces ,Photon energy ,Laser ,Nuclear & Particles Physics ,01 natural sciences ,Linear particle accelerator ,law.invention ,Optics ,law ,Physical Sciences ,0103 physical sciences ,Cathode ray ,lcsh:QC770-798 ,High harmonic generation ,lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ,Seeding ,010306 general physics ,business - Abstract
Author(s): Hemsing, E; Marcus, G; Fawley, WM; Schoenlein, RW; Coffee, R; Dakovski, G; Hastings, J; Huang, Z; Ratner, D; Raubenheimer, T; Penn, G | Abstract: We present the results from studies of soft X-ray seeding options for the LCLS-II X-ray free electron laser (FEL) at SLAC. The LCLS-II will use superconducting accelerator technology to produce X-ray pulses at up to 1 MHz repetition rate using 4 GeV electron beams. If properly seeded, these pulses will be nearly fully coherent, and highly stable in photon energy, bandwidth, and intensity, thus enabling unique experiments with intense high-resolution soft X-rays. Given the expected electron beam parameters from start to end simulations and predicted FEL performance, our studies reveal echo enabled harmonic generation (EEHG) and soft X-ray self-seeding (SXRSS) as promising and complementary seeding methods. We find that SXRSS has the advantage of simplicity and will deliver 5-35 times higher spectral brightness than EEHG in the 1-2 nm range, but lacks some of the potential for phase-stable multipulse and multicolor FEL operations enabled by external laser seeding with EEHG.
- Published
- 2019