scholarly journals Electron-bunch compression using a dynamical nonlinearity correction for a compact x-ray free-electron laser

2009 ◽  
Vol 12 (8) ◽  
Author(s):  
Kazuaki Togawa ◽  
Toru Hara ◽  
Hitoshi Tanaka
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Electron Bunch ◽  
X Ray ◽  
Bunch Compression

scholarly journals For the generation of an intense isolated pulse in hard X-ray region using X-ray free electron laser

2012 ◽  
Vol 30 (3) ◽  
pp. 397-406 ◽  
Author(s):  
Sandeep Kumar ◽  
Heung-Sik Kang ◽  
Dong-Eon Kim
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Electron Bunch ◽  
Attosecond Pulse ◽  
Current Profile ◽  
Distribution Profile ◽  
X Ray ◽  
Isolated Attosecond Pulse ◽  
Pump Probe Experiment ◽  
Pal Xfel

AbstractFor a real, meaningful pump-probe experiment with attosecond temporal resolution, an intense isolated attosecond pulse is in demand. For that purpose we report the generation of an intense isolated attosecond pulse, especially in X-ray region using a current-enhanced self-amplified spontaneous emission in a free electron laser (FEL). We use a few cycle laser pulse to manipulate the electron-bunch inside a two-period planar wiggler. In our study, we employ the electron beam parameters of Pohang Accelerator Laboratory (PAL)-XFEL. The RF phase effect of accelerator columns on the longitudinal energy distribution profile and current profile of electron-bunch is also studied, aiming that these results can be experimentally realized in PAL-XFEL. We show indeed that the manipulation of electron-energy bunch profile may lead to the generation of an isolated attosecond hard X-ray pulse: 150 attosecond radiation pulse at 0.1 nm wavelength can be generated.

scholarly journals Slice collective dynamics, projected emittance deterioration and free electron laser performances detrimental effects

2020 ◽  
Vol 86 (6) ◽  
Author(s):  
G. Dattoli ◽  
S. Di Mitri ◽  
F. Nguyen ◽  
A. Petralia
Keyword(s):  
Phase Space ◽  
Output Power ◽  
Free Electron ◽  
Free Electron Laser ◽  
Coherence Length ◽  
Electron Bunch ◽  
Laser Intensity ◽  
Beam Transport ◽  
X Ray ◽  
Laser Dynamics

Self-amplified spontaneous emission (SASE) free electron laser (FEL) devices have disclosed an unexpected interplay between the laser intensity growth and regions of the electron bunch of the order of the coherence length. They are usually identified with the bunch slice and contribute to the laser dynamics with their own characteristics. The dynamical effects inducing geometrical and phase space misalignment of bunch slice in X-ray operating FELs can be traced back to a plethora of phenomena, both in the Linac accelerating section or inside the beam transport optic magnet. They are responsible for spoiling of the beam projected qualities and, if not corrected properly, induce an increase of the saturation length and a decreasing of the output power. We discuss the inclusion of these effects in models employing scaling formulae.

scholarly journals A micro channel-cut crystal X-ray monochromator for a self-seeded hard X-ray free-electron laser

2019 ◽  
Vol 26 (5) ◽  
pp. 1496-1502 ◽  
Author(s):  
Taito Osaka ◽  
Ichiro Inoue ◽  
Ryota Kinjo ◽  
Takashi Hirano ◽  
Yuki Morioka ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Electron Bunch ◽  
Optical Pulse ◽  
Seed Pulse ◽  
Micro Channel ◽  
Free Electron Lasers ◽  
X Ray ◽  
Optical Delay ◽  
Temporal Overlap

A channel-cut Si(111) crystal with a channel width of 90 µm was developed for achieving reflection self-seeding in hard X-ray free-electron lasers (XFELs). With the crystal a monochromatic seed pulse is produced from a broadband XFEL pulse generated in the first undulator section with an optical delay of 119 fs at 10 keV. The small optical delay allows a temporal overlap between the seed optical pulse and the electron bunch by using a small magnetic chicane for the electron beam placed between two undulator sections. Peak reflectivity reached 67%, which is reasonable compared with the theoretical value of 81%. By using this monochromator, a monochromatic seed pulse without broadband background in the spectrum was obtained at SACLA with a conversion efficiency from a broadband XFEL pulse of 2 × 10−2, which is ∼10 times higher than the theoretical efficiency of transmission self-seeding using a thin diamond (400) monochromator.

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

X-ray Free Electron Laser SACLA

2014 ◽  
Vol 134 (12) ◽  
pp. 836-839
Author(s):  
Junichi INOUE ◽  
Yuji TANAKA ◽  
Yuki MATSUMOTO ◽  
Kensuke KANDA
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
X Ray

scholarly journals Production of superconducting 1.3-GHz cavities for the European X-ray Free Electron Laser

2016 ◽  
Vol 19 (9) ◽  
Author(s):  
W. Singer ◽  
A. Brinkmann ◽  
R. Brinkmann ◽  
J. Iversen ◽  
A. Matheisen ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
X Ray
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