The seed laser system of the FERMI free-electron laser: design, performance and near future upgrades

被引：14

作者：

Cinquegrana, P. ^{[1
]}

Demidovich, A. ^{[1
]}

Kurdi, G. ^{[1
]}

Nikolov, I ^{[1
]}

Sigalotti, P. ^{[1
]}

Susnjar, P. ^{[1
]}

Danailov, M. B. ^{[1
]}

机构：

[1] Elettra Sincrotrone Trieste, Area Sci Pk, I-34149 Trieste, Italy

来源：

HIGH POWER LASER SCIENCE AND ENGINEERING | 2021年 / 9卷

关键词：

free-electron laser seeding; time-resolved X-ray measurements; PULSES;

D O I：

10.1017/hpl.2021.49

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页数：13

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