SwissFEL Workshop
from
Tuesday, 19 May 2015 (08:00)
to
Wednesday, 20 May 2015 (18:00)
Monday, 18 May 2015
Tuesday, 19 May 2015
09:00
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
)
09:00 - 09:05
09:05
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
)
09:05 - 09:20
09:20
SwissFEL operation modes (+ Discussion)
-
Sven Reiche
(
Paul Scherrer Institut
)
SwissFEL operation modes (+ Discussion)
Sven Reiche
(
Paul Scherrer Institut
)
09:20 - 09:55
09:55
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
)
09:55 - 10:35
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
Coffee break
Coffee break
10:35 - 11:05
11:05
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 - 11:50
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
Nonlinear X-Ray Wave-Mixing (+ Discussion)
-
Sharon Shwartz
(
Bar Ilan University
)
Nonlinear X-Ray Wave-Mixing (+ Discussion)
Sharon Shwartz
(
Bar Ilan University
)
11:50 - 12:35
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
Lunch break
Lunch break
12:35 - 13:45
13:45
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
)
13:45 - 14:30
14:30
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
)
14:30 - 15:15
15:15
Coffee break
Coffee break
15:15 - 15:45
15:45
Non-linear experiments with soft X-rays at the SwissFEL
Non-linear experiments with soft X-rays at the SwissFEL
15:45 - 16:05
16:05
Further discussions / Conclusions
Further discussions / Conclusions
16:05 - 17:00
18:30
Invited dinner for speakers
Invited dinner for speakers
18:30 - 21:30
Wednesday, 20 May 2015
09:00
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
)
09:00 - 09:05
09:05
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
)
09:05 - 09:20
09:20
Participant contributions
Participant contributions
09:20 - 10:30
10:30
Coffe break
Coffe break
10:30 - 11:00
11:00
Participant contributions / Discussions
Participant contributions / Discussions
11:00 - 12:30
12:30
Lunch break
Lunch break
12:30 - 13:30
13:30
Participant contributions / Discussions
Participant contributions / Discussions
13:30 - 15:30
15:30
Coffee break
Coffee break
15:30 - 16:00
16:00
Conclusion
Conclusion
16:00 - 17:00