scholarly journals From SPARC_LAB to EuPRAXIA@SPARC_LAB

Instruments ◽  
2019 ◽  
Vol 3 (3) ◽  
pp. 45 ◽  
Author(s):  
Riccardo Pompili ◽  
Enrica Chiadroni ◽  
Alessandro Cianchi ◽  
Massimo Ferrario ◽  
Alessandro Gallo ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Plasma Accelerator ◽  
Test Facility ◽  
Design Study ◽  
X Ray ◽  
User Facility ◽  
Beam Parameters ◽  
New Facility

Following the promising results obtained at the SPARC_LAB test-facility in Frascati (Italy), we have recently submitted a proposal to develop a new facility driven by a plasma accelerator module for extended and user-oriented applications. The new multi-disciplinary user-facility will be equipped with a soft X-ray Free Electron Laser (FEL) operating with energies larger than 1 GeV. This design study is performed to be fully compatible with the EuPRAXIA design study. Here, the latest layout and beam parameters are presented.

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

2019 ◽  
Vol 26 (4) ◽  
pp. 1073-1084 ◽  
Author(s):  
Rafael Abela ◽  
Arturo Alarcon ◽  
Jürgen Alex ◽  
Christopher Arrell ◽  
Vladimir Arsov ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Pulse Length ◽  
X Ray ◽  
Materials Research ◽  
Transport Line ◽  
Beam Parameters ◽  
X Architecture ◽  
Particle Imaging ◽  
Single Particle Imaging

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.

scholarly journals The free-electron laser FLASH

2015 ◽  
Vol 3 ◽  
Author(s):  
Siegfried Schreiber ◽  
Bart Faatz
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Extreme Ultraviolet ◽  
Laser Flash ◽  
Single Shot ◽  
Short Pulses ◽  
X Ray ◽  
Pump And Probe ◽  
User Facility ◽  
Diffraction Imaging

FLASH at DESY, Hamburg, Germany is the first free-electron laser (FEL) operating in the extreme ultraviolet (EUV) and soft x-ray wavelength range. FLASH is a user facility providing femtosecond short pulses with an unprecedented peak and average brilliance, opening new scientific opportunities in many disciplines. The first call for user experiments has been launched in 2005. The FLASH linear accelerator is based on TESLA superconducting technology, providing several thousands of photon pulses per second to user experiments. Probing femtosecond-scale dynamics in atomic and molecular reactions using, for instance, a combination of x-ray and optical pulses in a pump and probe arrangement, as well as single-shot diffraction imaging of biological objects and molecules, are typical experiments performed at the facility. We give an overview of the FLASH facility, and describe the basic principles of the accelerator. Recently, FLASH has been extended by a second undulator beamline (FLASH2) operated in parallel to the first beamline, extending the capacity of the facility by a factor of two.

Free-electron laser multiplex driven by a superconducting linear accelerator

2016 ◽  
Vol 23 (5) ◽  
pp. 1070-1075 ◽  
Author(s):  
Tim Plath ◽  
Philipp Amstutz ◽  
Jörn Bödewadt ◽  
Günter Brenner ◽  
Nagitha Ekanayake ◽  
...  
Keyword(s):  
Research And Development ◽  
Free Electron ◽  
Free Electron Laser ◽  
Linear Accelerator ◽  
Extreme Ultraviolet ◽  
Free Electron Lasers ◽  
X Ray ◽  
User Facility ◽  
20 Nm ◽  
Simultaneous Lasing

Free-electron lasers (FELs) generate femtosecond XUV and X-ray pulses at peak powers in the gigawatt range. The FEL user facility FLASH at DESY (Hamburg, Germany) is driven by a superconducting linear accelerator with up to 8000 pulses per second. Since 2014, two parallel undulator beamlines, FLASH1 and FLASH2, have been in operation. In addition to the main undulator, the FLASH1 beamline is equipped with an undulator section, sFLASH, dedicated to research and development of fully coherent extreme ultraviolet photon pulses using external seed lasers. In this contribution, the first simultaneous lasing of the three FELs at 13.4 nm, 20 nm and 38.8 nm is presented.

scholarly journals The SXFEL Upgrade: From Test Facility to User Facility

2021 ◽  
Vol 12 (1) ◽  
pp. 176
Author(s):  
Bo Liu ◽  
Chao Feng ◽  
Duan Gu ◽  
Fei Gao ◽  
Haixiao Deng ◽  
...  
Keyword(s):  
Free Electron Laser ◽  
Test Facility ◽  
X Ray ◽  
Water Window ◽  
Laser Facility ◽  
User Facility ◽  
Two Phases ◽  
Design Construction ◽  
Whole Water ◽  
Future Plans

The Shanghai soft X-ray Free-Electron Laser facility (SXFEL), which is the first X-ray FEL facility in China, is being constructed in two phases: the test facility (SXFEL-TF) and the user facility (SXFEL-UF). The test facility was initiated in 2006 and funded in 2014. The commissioning of the test facility was finished in 2020. The user facility was funded in 2016 to upgrade the accelerator energy and build two undulator lines with five experimental end-stations. The output photon energy of the user facility will cover the whole water window range. This paper presents an overview of the SXFEL facility, including considerations of the upgrade, layout and design, construction status, commissioning progress and future plans.

scholarly journals Hartmann wavefront sensors and their application at FLASH

2016 ◽  
Vol 23 (1) ◽  
pp. 43-49 ◽  
Author(s):  
Barbara Keitel ◽  
Elke Plönjes ◽  
Svea Kreis ◽  
Marion Kuhlmann ◽  
Kai Tiedtke ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Wavefront Sensors ◽  
Typical Application ◽  
X Ray ◽  
Alignment Procedure ◽  
Beam Characterization ◽  
Different Types ◽  
Online Measurements ◽  
Beam Parameters

Different types of Hartmann wavefront sensors are presented which are usable for a variety of applications in the soft X-ray spectral region at FLASH, the free-electron laser (FEL) in Hamburg. As a typical application, online measurements of photon beam parameters during mirror alignment are reported on. A compact Hartmann sensor, operating in the wavelength range from 4 to 38 nm, was used to determine the wavefront quality as well as aberrations of individual FEL pulses during the alignment procedure. Beam characterization and alignment of the focusing optics of the FLASH beamline BL3 were performed with λ13.5 nm/116 accuracy for wavefront r.m.s. (wrms) repeatability, resulting in a reduction ofwrmsby 33% during alignment.

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