Abstract
Abstract
An important trend in extreme ultraviolet and soft X-ray free-electron laser (FEL) development in recent years has been the use of seeding by an external laser, aimed to improve the coherence and stability of the generated pulses. The high-gain harmonic generation seeding technique was first implemented at FERMI and provided FEL radiation with high coherence as well as intensity and wavelength stability comparable to table-top ultrafast lasers. At FERMI, the seed laser has another very important function: it is the source of external laser pulses used in pump–probe experiments allowing one to achieve a record-low timing jitter. This paper describes the design, performance and operational modes of the FERMI seed laser in both single- and double-cascade schemes. In addition, the planned upgrade of the system to meet the challenges of the upgrade to echo-enabled harmonic generation mode is presented.
Publisher
Cambridge University Press (CUP)
Subject
Nuclear Energy and Engineering,Nuclear and High Energy Physics,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Reference23 articles.
1. High-Gain Harmonic-Generation Free-Electron Laser
2. Generation and measurement of intense few-femtosecond superradiant extreme-ultraviolet free-electron laser pulses
3. Widely tunable two-colour seeded free-electron laser source for resonant-pump resonant-probe magnetic scattering
4. 15. Ferianis, M. , Bucconi, A. , Gaio, G. , Mian, G. , Predonzani, M. , and Rossi, F. , in Proceedings of Beam Instrumentation Workshop (2010), p. 398.
5. Two-stage seeded soft-X-ray free-electron laser
Cited by
9 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献