The SwissFEL soft X-ray free-electron laser beamline: Athos

Abstract

The SwissFEL soft X-ray free-electron laser (FEL) beamline Athos will be ready for user operation in 2021. Its design includes a novel layout of alternating magnetic chicanes and short undulator segments. Together with the APPLE X architecture of undulators, the Athos branch can be operated in different modes producing FEL beams with unique characteristics ranging from attosecond pulse length to high-power modes. Further space has been reserved for upgrades including modulators and an external seeding laser for better timing control. All of these schemes rely on state-of-the-art technologies described in this overview. The optical transport line distributing the FEL beam to the experimental stations was designed with the whole range of beam parameters in mind. Currently two experimental stations, one for condensed matter and quantum materials research and a second one for atomic, molecular and optical physics, chemical sciences and ultrafast single-particle imaging, are being laid out such that they can profit from the unique soft X-ray pulses produced in the Athos branch in an optimal way.

Extended x-ray emission times of clusters in intense x-ray pulses

“…These fluences correspond to 0.03 to 3 mJ pulses or 1.5×10 17 to 1.5×10 19 W/cm 2 . These short pulses are currently accessible and will also be available in the upgraded facilities [53,54]. Also, by examining Ar clusters of different sizes, our study illuminates the impact of a complex environment on fluorescence dynamics beyond that of an isolated atom.…”

The role of transient resonances for ultra-fast imaging of single sucrose nanoclusters

“…6 such pulses will outperform the milli-Joule and 180 femtosecond pulses used in the current experiment. The ever increasing number of operation modes for short pulses can further extend the parameter space for imaging experiments 44,45 .…”

Генерация Гармоник В Экспериментах С Лазерами На Свободных Электронах В Рентгеновском Диапазоне --- Теоретический Анализ

“…Таким образом, оценка, полученная нами на основе расщепления линий, ближе к экспериментальному значению. В заключении рассмотрим ЛСЭ эксперименты на установке SwissFEL по генерации жесткого рентгеновского излучения в диапазоне ∼ 1.5−0.1 nm на ондуляторной линии Aramis [59][60][61][62]. Особенностью установки является малый разброс энергии, 350 keV, что означает σ e = 0.006% для энергии E = 5.8 GeV электронов, которые излучают на длине волны λ 1 = 0.1 nm.…”