scholarly journals Electro-optic time profile monitors for femtosecond electron bunches at the soft x-ray free-electron laser FLASH

2009 ◽  
Vol 12 (3) ◽  
Author(s):  
B. Steffen ◽  
V. Arsov ◽  
G. Berden ◽  
W. A. Gillespie ◽  
S. P. Jamison ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Laser Flash ◽  
Time Profile ◽  
X Ray ◽  
Electron Bunches ◽  
Electro Optic ◽  
Femtosecond Electron Bunches

scholarly journals Observation of K-Shell Soft X Ray Emission of Nitrogen Irradiated by XUV-Free Electron Laser FLASH at Intensities Greater than 1016 W/cm2

2011 ◽  
Vol 51 (2-3) ◽  
pp. 284-287
Author(s):  
E. Galtier ◽  
F.B. Rosmej ◽  
O. Renner ◽  
L. Juha ◽  
J. Chalupsky ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Laser Flash ◽  
X Ray

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.

scholarly journals Stabilization of a high-order harmonic generation seeded extreme ultraviolet free electron laser by time-synchronization control with electro-optic sampling

2015 ◽  
Vol 3 ◽  
Author(s):  
H. Tomizawa ◽  
T. Sato ◽  
K. Ogawa ◽  
K. Togawa ◽  
T. Tanaka ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Free Electron ◽  
Free Electron Laser ◽  
Laser Pulses ◽  
High Order Harmonic Generation ◽  
Electron Bunches ◽  
High Order Harmonic ◽  
Electro Optic ◽  
Seeded Fel ◽  
Arrival Timing

A fully coherent free electron laser (FEL) seeded with a higher-order harmonic (HH) pulse from high-order harmonic generation (HHG) is successfully operated for a sufficiently prolonged time in pilot user experiments by using a timing drift feedback. For HHG-seeded FELs, the seeding laser pulses have to be synchronized with electron bunches. Despite seeded FELs being non-chaotic light sources in principle, external laser-seeded FELs are often unstable in practice because of a timing jitter and a drift between the seeding laser pulses and the accelerated electron bunches. Accordingly, we constructed a relative arrival-timing monitor based on non-invasive electro-optic sampling (EOS). The EOS monitor made uninterrupted shot-to-shot monitoring possible even during the seeded FEL operation. The EOS system was then used for arrival-timing feedback with an adjustability of 100 fs for continual operation of the HHG-seeded FEL. Using the EOS-based beam drift controlling system, the HHG-seeded FEL was operated over half a day with an effective hit rate of 20%–30%. The output pulse energy was $20~{\rm\mu}\text{J}$ at the 61.2 nm wavelength. Towards seeded FELs in the water window region, we investigated our upgrade plan to seed high-power FELs with HH photon energy of 30–100 eV and lase at shorter wavelengths of up to 2 nm through high-gain harmonic generation (HGHG) at the energy-upgraded SPring-8 Compact SASE Source (SCSS) accelerator. We studied a benefit as well as the feasibility of the next HHG-seeded FEL machine with single-stage HGHG with tunability of a lasing wavelength.

scholarly journals 10 years of pioneering X-ray science at the Free-Electron Laser FLASH at DESY

2019 ◽  
Vol 808 ◽  
pp. 1-74 ◽  
Author(s):  
Jörg Rossbach ◽  
Jochen R. Schneider ◽  
Wilfried Wurth
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Laser Flash ◽  
X Ray

scholarly journals The TRIXS end-station for femtosecond time-resolved resonant inelastic x-ray scattering experiments at the soft x-ray free-electron laser FLASH

2020 ◽  
Vol 7 (5) ◽  
pp. 054301 ◽  
Author(s):  
S. Dziarzhytski ◽  
M. Biednov ◽  
B. Dicke ◽  
A. Wang ◽  
P. S. Miedema ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Laser Flash ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals The soft x-ray free-electron laser FLASH at DESY: beamlines, diagnostics and end-stations

2009 ◽  
Vol 11 (2) ◽  
pp. 023029 ◽  
Author(s):  
K Tiedtke ◽  
A Azima ◽  
N von Bargen ◽  
L Bittner ◽  
S Bonfigt ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Laser Flash ◽  
X Ray

X-Ray Free Electron Laser Facility for Next Generation of Scientific Exploration and Discovery

2011 ◽  
Vol 131 (2) ◽  
pp. 68-71
Author(s):  
Etsuo FUJIWARA ◽  
Eiichi ANAYAMA ◽  
Yuichiro KATSUTA ◽  
Toshiki IZUTANI ◽  
Daichi OKUHARA ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Next Generation ◽  
X Ray ◽  
Scientific Exploration ◽  
Laser Facility
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