SwissFEL Workshop
from
Tuesday, May 19, 2015 (8:00 AM)
to
Wednesday, May 20, 2015 (6:00 PM)
Monday, May 18, 2015
Tuesday, May 19, 2015
9:00 AM
Workshop information: 19.05.2015 - Non-linear experiments with hard X-rays at SwissFEL
-
Bill Francesco Pedrini
(
Paul Scherrer Institut
)
Workshop information: 19.05.2015 - Non-linear experiments with hard X-rays at SwissFEL
Bill Francesco Pedrini
(
Paul Scherrer Institut
)
9:00 AM - 9:05 AM
9:05 AM
Overview SwissFEL hard X-ray experimental stations (ES-A, ES-B, ES-C)
-
Bill Francesco Pedrini
(
Paul Scherrer Institut
)
Overview SwissFEL hard X-ray experimental stations (ES-A, ES-B, ES-C)
Bill Francesco Pedrini
(
Paul Scherrer Institut
)
9:05 AM - 9:20 AM
9:20 AM
SwissFEL operation modes (+ Discussion)
-
Sven Reiche
(
Paul Scherrer Institut
)
SwissFEL operation modes (+ Discussion)
Sven Reiche
(
Paul Scherrer Institut
)
9:20 AM - 9:55 AM
9:55 AM
X-ray nonlinear processes in solid Fe with hard X-ray free-electron laser pulses (+ Discussion)
-
Joanna Hoszowska
(
University of Fribourg, Department of Physics
)
X-ray nonlinear processes in solid Fe with hard X-ray free-electron laser pulses (+ Discussion)
Joanna Hoszowska
(
University of Fribourg, Department of Physics
)
9:55 AM - 10:35 AM
Nonlinear interaction of solid Fe with intense femtosecond hard x-ray free-electron laser (XFEL) pulses will be reported. The experiment was performed at the CXI end-station of the Linac Coherent Light Source (LCLS) by means of high-resolution x-ray emission spectroscopy. Extreme fluences reaching ~10^5 photons/Å^2 allowed for x-ray nonlinear two-photon absorption. Double-K-hole formation via sequential two-photon absorption, and the direct two-photon absorption leading to single K-shell ionization was observed. The cross-sections for the nonlinear x-ray photon absorption processes were derived from the x-ray fluence dependence of the measured x-ray emission rates. I will present the obtained results as well as the different aspects of the experimental setup, the beam parameters and diagnostic in view of future needs.
10:35 AM
Coffee break
Coffee break
10:35 AM - 11:05 AM
11:05 AM
X-ray nonlinear absorption and emission processes (+ Discussion)
-
Kenji Tamasaku
(
RIKEN SPring-8 Center
)
X-ray nonlinear absorption and emission processes (+ Discussion)
Kenji Tamasaku
(
RIKEN SPring-8 Center
)
11:05 AM - 11:50 AM
I will present our recent results on nonlinear absorption and emission processes obtained at SACLA. As for the absorption, I will present two-photon absorption experiment and discuss requirements to perform X-ray two-photon absorption spectroscopy. In the emission process, I will show that the fluorescence decay channel is controllable with intense X-rays, and discuss the theoretical background. Finally, I will explain our requests for the XFEL beam to perform more advanced X-ray nonlinear experiments.
11:50 AM
Nonlinear X-Ray Wave-Mixing (+ Discussion)
-
Sharon Shwartz
(
Bar Ilan University
)
Nonlinear X-Ray Wave-Mixing (+ Discussion)
Sharon Shwartz
(
Bar Ilan University
)
11:50 AM - 12:35 PM
I will describe recently performed experiments demonstrating nonlinear x-ray wave-mixing including x-ray and visible wave mixing [1], x-ray second harmonic generation [2], and x-ray parametric down-conversion [3]. I will present theoretical studies of difference-frequency generation of optical radiation from two-color x-ray pulses [4], and x-ray-pulse characterization by spectral shearing interferometry [5]. I will discuss future directions of exploring nonlinear and quantum effects in the x-ray regime. For example, x-ray parametric down-conversion may be developed into a very powerful method to study fundamental effects in quantum optics. X-ray and visible mixing may lead to atomic scale resolution techniques to study chemical bonds. Nonlinear techniques are expected to be useful in the inspection of sub-femtosecond temporal pulses. [1] T. E. Glover et al., Nature 488, 603 (2012). [2] S. Shwartz et al. Phy. Rev. Lett. 112, 163901 (2014). [3] S. Shwartz et al. Phy. Rev. Lett. 109, 013602 (2012). [4] E. Shwartz and S. Shwartz, Opt. Exp. 23, 7471 (2015) [5] S. Yudovich and S. Shwartz, Phys. Rev. A 90, 033805 (2014).
12:35 PM
Lunch break
Lunch break
12:35 PM - 1:45 PM
1:45 PM
Implications of Stimulated Resonant X-ray Scattering for Spectroscopy with X-Rays (+ Discussion)
-
Alexander Foehlisch
(
Helmholtz-Zentrum Berlin
)
Implications of Stimulated Resonant X-ray Scattering for Spectroscopy with X-Rays (+ Discussion)
Alexander Foehlisch
(
Helmholtz-Zentrum Berlin
)
1:45 PM - 2:30 PM
2:30 PM
Stimulated electronic x-ray Raman scattering and perspectives for nonlinear optical spectroscopy at XFELs (+ Discussion)
-
Nina Rohringer
(
Max Planck Institute for the structure and dynamics of matter
)
Stimulated electronic x-ray Raman scattering and perspectives for nonlinear optical spectroscopy at XFELs (+ Discussion)
Nina Rohringer
(
Max Planck Institute for the structure and dynamics of matter
)
2:30 PM - 3:15 PM
3:15 PM
Coffee break
Coffee break
3:15 PM - 3:45 PM
3:45 PM
Non-linear experiments with soft X-rays at the SwissFEL
Non-linear experiments with soft X-rays at the SwissFEL
3:45 PM - 4:05 PM
4:05 PM
Further discussions / Conclusions
Further discussions / Conclusions
4:05 PM - 5:00 PM
6:30 PM
Invited dinner for speakers
Invited dinner for speakers
6:30 PM - 9:30 PM
Wednesday, May 20, 2015
9:00 AM
Workshop information: 20.05.2015 - Nanoscale Material Science at SwissFEL
-
Bill Francesco Pedrini
(
Paul Scherrer Institut
)
Workshop information: 20.05.2015 - Nanoscale Material Science at SwissFEL
Bill Francesco Pedrini
(
Paul Scherrer Institut
)
9:00 AM - 9:05 AM
9:05 AM
Overview SwissFEL hard X-ray experimental stations (ES-A, ES-B, ES-C)
-
Bill Francesco Pedrini
(
Paul Scherrer Institut
)
Overview SwissFEL hard X-ray experimental stations (ES-A, ES-B, ES-C)
Bill Francesco Pedrini
(
Paul Scherrer Institut
)
9:05 AM - 9:20 AM
9:20 AM
Participant contributions
Participant contributions
9:20 AM - 10:30 AM
10:30 AM
Coffe break
Coffe break
10:30 AM - 11:00 AM
11:00 AM
Participant contributions / Discussions
Participant contributions / Discussions
11:00 AM - 12:30 PM
12:30 PM
Lunch break
Lunch break
12:30 PM - 1:30 PM
1:30 PM
Participant contributions / Discussions
Participant contributions / Discussions
1:30 PM - 3:30 PM
3:30 PM
Coffee break
Coffee break
3:30 PM - 4:00 PM
4:00 PM
Conclusion
Conclusion
4:00 PM - 5:00 PM