First results from the commissioning of the FERMI@Elettra free electron laser by means of the Photon Analysis Delivery and Reduction System (PADReS)

Zangrando, Marco; Cudin, Ivan; Fava, C.; Gerusina, Simone; Gobessi, R.; Godnig, R.; Rumiz, L.; Svetina, Cristian; Parmigiani, F.; Cocco, Daniele

doi:10.1117/12.886459

Cited by 14 publications

(6 citation statements)

References 5 publications

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“…While the hard X-ray FELs are all based on the principle of SASE, one machine, FERMI@Elettra (Trieste, Italy), operates as a seeded FEL and therefore as a real laser. − It generates soft X-ray pulses up to about 300 eV, and work is in progress to increase this limit up to the oxygen K-edge.…”

Section: Sources Of Ultrashort X-ray Pulsesmentioning

confidence: 99%

Photoinduced Structural Dynamics of Molecular Systems Mapped by Time-Resolved X-ray Methods

2017

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ABSTRACT:We review the tremendous advances in ultrafast X-ray science, over the past 15 years, making the best use of new ultrashort x-ray sources including table-top or large-scale facilities. Different complementary x-ray based techniques, including spectroscopy, scattering and diffraction, are presented. The broad and expanding spectrum of these techniques in the ultrafast time domain, is delivering new insight into the dynamics of molecular systems, of solutions, of solids and of Biosystems. Probing the time evolution of the electronic and structural degrees of freedom of these systems on the timescales of femtosecond to picoseconds delivers new insight into our understanding of dynamical matter.

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Section: Sources Of Ultrashort X-ray Pulsesmentioning

confidence: 99%

Photoinduced Structural Dynamics of Molecular Systems Mapped by Time-Resolved X-ray Methods

2017

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“…Each pulse has a duration of about 65 fs (full width at half maximum, FWHM) and a mean energy of 95 μ J, which corresponds to approximately 10 13 photons. The FEL beam intensity before the sample is monitored through a calibrated ionization chamber 6 . The emitted radiation is recorded by using an avalanche photodiode (APD, Laser Components SAR1500x) detector with a slit width w of 1.0 mm positioned at a distance D = 120 mm away from the sample on a circular rotating ring.…”

Section: Methodsmentioning

confidence: 99%

EUV stimulated emission from MgO pumped by FEL pulses

Jonnard

André

Guen

et al. 2017

Structural Dynamics

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Stimulated emission is a fundamental process in nature that deserves to be investigated and understood in the extreme ultra-violet (EUV) and x-ray regimes. Today, this is definitely possible through high energy density free electron laser (FEL) beams. In this context, we give evidence for soft-x-ray stimulated emission from a magnesium oxide solid target pumped by EUV FEL pulses formed in the regime of travelling-wave amplified spontaneous emission in backward geometry. Our results combine two effects separately reported in previous works: emission in a privileged direction and existence of a material-dependent threshold for the stimulated emission. We develop a novel theoretical framework, based on coupled rate and transport equations taking into account the solid-density plasma state of the target. Our model accounts for both observed mechanisms that are the privileged direction for the stimulated emission of the Mg L2,3 characteristic emission and the pumping threshold.

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“…The direct method to measure duration and longitudinal coherence is to develop and fabricate an X-ray auto-correlator such as the EUV-and XUV-region device developed at FLASH [128,129] and FERMI using the wave-front split and delay scan technique. Currently, an autocorrelation technique for the hard X-ray region is still in development at SCALA and LCLS [130,131], where single X-ray pulse splitting is performed by Laue crystal diffraction to keep the device compact.…”

Section: X-ray Diagnosticsmentioning

confidence: 99%

The MING proposal at SHINE: megahertz cavity enhanced X-ray generation

et al. 2023

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The cavity-based X-ray free-electron laser (XFEL) has promise in producing fully coherent pulses with a bandwidth of a few meV and very stable intensity, whereas the currently existing self-amplified spontaneous emission (SASE) XFEL is capable of generating ultra-short pulses with chaotic spectra. In general, a cavity-based XFEL can provide a spectral brightness three orders of magnitude higher than that of the SASE mode, thereby opening a new door for cutting-edge scientific research. With the development of superconducting MHz repetition-rate XFEL facilities such as FLASH, European-XFEL, LCLS-II, and SHINE, practical cavity-based XFEL operations are becoming increasingly achievable. In this study, megahertz cavity enhanced X-ray generation (MING) is proposed based on China’s first hard XFEL facility - SHINE, which we refer to as MING@SHINE.

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First results from the commissioning of the FERMI@Elettra free electron laser by means of the Photon Analysis Delivery and Reduction System (PADReS)

Cited by 14 publications

References 5 publications

Photoinduced Structural Dynamics of Molecular Systems Mapped by Time-Resolved X-ray Methods

Photoinduced Structural Dynamics of Molecular Systems Mapped by Time-Resolved X-ray Methods

EUV stimulated emission from MgO pumped by FEL pulses

The MING proposal at SHINE: megahertz cavity enhanced X-ray generation

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