Transcript Discussion on XFELO Sciences

Discussion on XFEL Sciences
 XFELO Characteristics
(1) High repetition rate (cf. XFEL) → High Flux
(2) Long longitudinal coherence length
(Full temporal coherence)
(3) Ultrafine BW
(4) Stability
(5) Other:
- Tunable, typically over 5% photon energy
- Pulse length: 0.1 – 1 ps
XFELO 2013, Feb. 14-15, 2013, POSCO International Center, Pohang Korea
Possible Scientific Areas to be explored
 High resolution spectroscopy
- Inelastic x-ray scattering
- Mössbauer spectroscopy
 High energy X-ray photoemission spectroscopy
 Dynamics and Imaging with Coherent X-rays (CDI, XPCS,
speckle analysis)
 Dynamics with X-ray Microscopy and Phase Contrast
Imaging
 Quantum Optics in X-ray regime, Non-linear optics
 Any other?
XFELO 2013, Feb. 14-15, 2013, POSCO International Center, Pohang Korea
IXS with sub-meV Resolution: Opening New Frontiers in the S
tudy of the Dynamics in Disordered Systems
by Giulio Monaco
• Key word
XFELO promises to offer 104 times more intensity than the ESRF and 102 more
than the XFEL when used as a CW machine.
High resolution IXS experiments with 0.1 meV resolution, Small samples,
disordered systems.
Characteristics
Essential
point or
not
Remarks
High repetition rate
(high flux)
Yes
XFELO promises to offer 104 times
more intensity than the ESRF and
102 more than the XFEL when used
as a CW machine.
Longitudinal coherence
Narrow band width (meV)
Yes
Stability
Yes
XFELO 2013, Feb. 14-15, 2013, POSCO International Center, Pohang Korea
XFELO for Studying Dynamics with Coherent X-rays
by Hyunjung Kim
• Key word
Stability : Traditional XPCS available. Dynamics with Microsecond time
scale in 2D, Highly Coherent Flux for Biological Samples, Wide Angle
Scattering Measurement, Coherent at High Energy will be useful.
Characteristics
Essential
point or
not
High repetition rate
(high flux)
Yes
Longitudinal coherence
Yes
Narrow band width (meV)
Yes
Stability
Yes
Remarks
XFELO 2013, Feb. 14-15, 2013, POSCO International Center, Pohang Korea
IXS and Atto-second Imaging
by Yu Gan
• Key word
Collective Excitations, Standing Wave Inelastic X-ray Scattering, Attosecond
time resolution without attosecond pulses – 1000x better resolution than
XFEL pump-probe.
XFELO provides much higher brilliance (x106 ) to overcome small cross
sections of IXS.
Characteristics
Essential Remarks
point or
not
High repetition rate
(high flux)
Yes
Longitudinal coherence
Narrow band width
(meV)
Yes
Stability
Yes
XFELO 2013, Feb. 14-15, 2013, POSCO International Center, Pohang Korea
Hard X-Ray Photoemission (HXPS, HAXPES) with an XFELO
by Chuck Fadley
• Key word
More bulk sensitive spectra  a versatile tool for any new material or
multilayer nanostructure
Characteristics
Essential Remarks
point or
not
High repetition rate
(high flux)
Yes
Longitudinal coherence
Narrow band width (meV)
Yes
Stability
Yes
This point is most important for t
his subject
XFELO 2013, Feb. 14-15, 2013, POSCO International Center, Pohang Korea
Structure of Coatomer (COPI) Cage Proteins
by Changwook Lee
• Key word
Beautiful research work by means of structural protein crystallography, ho
wever, this work can be done by using general 3rd generation synchrotron
sources.
We should try to find much more suitable scientific application for protein
crystallography by means of XFELO.
Characteristics
Essential Remarks
point or
not
High repetition rate
(high flux)
Yes
Longitudinal coherence
?
Narrow band width (meV)
?
Stability
?
XFELO 2013, Feb. 14-15, 2013, POSCO International Center, Pohang Korea
Time-Resolved Studies with XFELO
by Hyotcherl Ihee
• Key word
For pump-probe X-ray diffraction (scattering), XFELO may be comparabl
e to or even better than XFEL. (as far as a MHz optical laser that provide
s comparable energy per pulse with a typical 1 kHz femtosecond laser sy
stem. But it may be for “soft matter”. ).
Characteristics
Essential Remarks
point or
not
High repetition rate
(high flux)
Yes or No
We need to develop the laser system with MH
z high power CW operation for soft matter. Fo
r hard materials lower value of pulse duration
will be okay. 0.5 MHz and several hundred W
CW laser will be developed soon by mean of fi
ber laser system.
Longitudinal coherence
Narrow band width
(meV)
Yes
At the case of diffraction work, it is not needed,
however, is there any interesting research field,
such as time resolved inelastic scattering?
XFELO
2013, POSCO International Center, Pohang Korea
Stability2013, Feb. 14-15,Yes
Bubble Dynamics Studied by X-ray Imaging
by Jung Ho Je
• Key word
Phase contrast imaging, Ultrafast Dynamics,
Dynamics of turbulent flow, supersonic flow, water drop skating on air film will
be possible. X-ray Imaging for Soft matter
Characteristics
Essential
point or
not
Remarks
High repetition rate
(high flux)
Yes
APS: 4x10^8 photons per multiple
bunch used to take 1 frame (FOV:
~ 1mm), multiple bunch width:
472nm
XFELO: ~10^9 photons per pulse,
1ps
Longitudinal coherence
No
Narrow band width (meV)
Yes
Stability
Yes
XFELO .2013, Feb. 14-15, 2013, POSCO International Center, Pohang Korea
Coherent X-ray Diffraction Imaging with Future Light Sources
by Do Young Noh
• Key word
Anomalous CDI, (2meV resolution with full coherence),
High Resolution CDI, pump-probe CDI, BraggCDI at wide angle
Characteristics
Essential
point or n
ot
High repetition rate
(high flux)
Yes
Longitudinal coherence
Yes
Narrow band width (meV)
Yes
Stability
Yes
Remarks
XFELO 2013, Feb. 14-15, 2013, POSCO International Center, Pohang Korea
Mossbauer Science – x-ray quantum optics with nuclei
by Jorg Evers
• Key word
Quantum, Non-linear, Nuclear quantum optics, and Control  Largely un
explored field
Characteristics
Essential Remarks
point or
not
High repetition rate
(high flux)
Yes
Longitudinal coherence
Yes
Narrow band width (meV)
Yes
Stability
Yes
This point is most important for this
subject
XFELO 2013, Feb. 14-15, 2013, POSCO International Center, Pohang Korea
Sub-Angstrom stabilized XFELO for Nuclear Resonance
Metrology and Fundamental Physics
by Bernhard Adams
• Key word
Length/time Standard, Precision Probe of Magnetic & Gravitational Fields,
Quantum Gravity, and Quantum Decoherence  Largely unexplored field
Characteristics
Essential Remarks
point or
not
High repetition rate
(high flux)
Yes
Longitudinal coherence
Yes
Narrow band width (meV)
Yes
Stability
Yes
This point is most important for
this subject
XFELO 2013, Feb. 14-15, 2013, POSCO International Center, Pohang Korea
Discussion and Perspectives
• With all the “prominent” characteristics available from XFELO, a
“new” group of users can be drawn into the “community”.
• The characteristics available from “seeded XFEL” should be
carefully compared.
– “single shot” vs “continuous (?) pulse” (in terms of stability)
– advantages of narrow BW with stability and higher rep. rate
• Any other possible experiments?
XFELO 2013, Feb. 14-15, 2013, POSCO International Center, Pohang Korea
Synchrotron
XFEL
XFELO
109
1012
109
10 -10 photons/sec
1014-1016
photons/sec
1015 photons/sec
1.5x1033
2.4x1033
# Photons
/pulse
Coherent Flux
8
9
Peak
Brilliance
Average
Brilliance
~1020
2.9x1022
6.0x1027
Spatial
Coherency
0.1%
100%
100%
Time
Coherency
No
0.5%
100%
0.3 x10-3
0.7 x10-7
Bandwidth
Time
Resolution
~picosec
10-100 femtosec
0.1 – 1 ps
Stability
Stable
Not stable
Stable
Rep. Rate
1-3 MHz
5002013,
MHz POSCO International
0.1-10 KHz
XFELO 2013, Feb. 14-15,
Center, Pohang Korea