WM_LHS_P022_SPP1236... - Goethe

Report
Laser heating at P02.2 at PETRA III,
capabilities and planning
W. Morgenroth1, Z. Konôpková2,
H.-P. Liermann2, B. Winkler1
1Goethe-Universität
Frankfurt am Main
2Deutsches Elektronen Synchrotron (DESY), Hamburg
Outline
• PETRA III at DESY
• Extreme Conditions Beamline (ECB)
– off-axis laser heating
– on-axis laser heating
– fluorescence setup
– CO2 laser heating system
– Extreme Conditions Science Infrastructure
• Outlook
W. Morgenroth, Uni Frankfurt
2
Research with Photons at DESY
Three generations of X-ray sources in one place:
DORIS III
2nd generation, 5 GeV machine
till 22th of October
PETRA III
3rd generation, 6 GeV machine
FLASH
4th generation, VUV and soft X-ray range
European XFEL
4th generation, hard X-ray range
starting in 2015-2016
PETRA III at DESY
Max von Laue experimental hall
Parameters:
Length: 2304 m
Energy: 6.0 GeV
Current: 100 mA
Bunches: 960 or 40
Horizontal emittance: 1 nmrad
 Most brilliant 3rd generation high energy source:
 Positron beam with small horizontal emittance
 Small source in undulator produces a photon beam with very small divergence
 X-ray beam can be focused well
 Time resolved experiments in the Hz frequency range
W. Morgenroth, Uni Frankfurt
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Outline
• PETRA III at DESY
• Extreme Conditions Beamline (ECB)
– off-axis laser heating
– on-axis laser heating
– fluorescence setup
– CO2 laser heating system
– Extreme Conditions Science Infrastructure
• Outlook
W. Morgenroth, Uni Frankfurt
5
Extreme Conditions Beamline (ECB) P02.2
at the
Hard X-Ray Diffraction Beamlines for Time Resolved Studies P02
•
•
fixed energies: 25.6, 42.7, 60.0 keV
focus (FWHM) at 42.7 keV:
– Kirkpatrick-Baez mirrors 1.5 x 1.5 µm or
– Compact Refractive Lenses 4 x 8 µm
•
sample stack with 100 nm precision
•
•
•
PerkinElmer XRD 1621 detectors
MarIP imaging plate
Pilatus 1M detector (pool)
•
•
gas membrane (not for all types of cells)
online ruby pressure at both tables
LH (left)
GP (right)
General
Laser heating
purpose
table
table X-rays
W. Morgenroth, Uni Frankfurt
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Laser heating table
• X-rays and
detector
• Observation and
spectrometer
path
• Fiber laser
• Ruby laser and
spectrometer
detector
W. Morgenroth, Uni Frankfurt
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Laser heating table
Observation path:
• Ag coated glassy carbon
mirrors
• geoHEAT 60_NIR objectives
• Prosilica cameras directly
inspecting the sample,
highly sensitive to see the
fluorescence of the X-ray
beam (~ 5 sec exposure)
• inspection at mirror pinhole
in front of spectrometer by
movable Pellicle
beamsplitter
4
2
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3
8
Laser heating table
Observation path:
• New: Andor shamrock
spectrometer and iStar iCCD
(fast, no filters necessary)
• two-sided temperature
measurement by spectral
radiometry (up- and
downstream in parallel using
double pinhole)
• 45 watt quartz-halogen
tungsten coiled filament lamp
(Gooch & Housego), standard
of correlated color
X-rays
temperature
W. Morgenroth, Uni Frankfurt
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Off-axis laser heating setup
Laser path:
• one 100 W NIR fiber laser
1064 nm
• split into upstream and
downstream path
• polarizing beam splitter cubes
and λ/2 waveplates in rotators
to control the power
• movement of lasers independent of (re)alignment of
observation path
W. Morgenroth, Uni Frankfurt
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3
2
4
5
10
Off-axis laser heating setup
Laser path:
• change of laser focus possible
• not necessarily an optical
element in path of X-rays
• but: basic alignment might be
more difficult due to reflection
in diamond
• planning: exchange the
stepper motor system by
Newport MFA linear stages
with sub micron resolution
Temperature range:
1000 K – 4000 K
W. Morgenroth, Uni Frankfurt
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Temperature determination
• collection of up- and
downstream spectra
in parallel
• exposure time in the second
to sub-second range
• analysis by BGI program
at once
• wavelength range usable:
550 to 850 nm
• example: Pt foil in
symmetric DAC, up- and
downstream
W. Morgenroth, Uni Frankfurt
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Outline
• PETRA III at DESY
• Extreme Conditions Beamline (ECB)
– off-axis laser heating
– on-axis laser heating
– fluorescence setup
– CO2 laser heating system
– Extreme Conditions Science Infrastructure
• Outlook
W. Morgenroth, Uni Frankfurt
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On-axis laser heating
W. Morgenroth, Uni Frankfurt
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On-axis laser heating
1
• 200 W IPG fiber laser,
1064 nm
• experiments reaching for
ultimate high pressure
• but: glassy carbon mirrors
for laser beam transport
in X-ray beam path
• but: no independent
change of laser focus
• therefore: this path will 2
include piShapers
W. Morgenroth, Uni Frankfurt
X-rays
15
Outline
• PETRA III at DESY
• Extreme Conditions Beamline (ECB)
– off-axis laser heating
– on-axis laser heating
– fluorescence setup
– CO2 laser heating system
– Extreme Conditions Science Infrastructure
• Outlook
W. Morgenroth, Uni Frankfurt
16
Fluorescence setup
• Vortex detector (and
expertise) from beamline L
• XOS Capillary with 50 mm
focal length, input focal
spot size <= 160 µm @
17.4 keV
• grid scans implemented in
control software Online
• parallel mapping of
fluorescence and X-ray
diffraction (XRF, XRD)
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2
17
Fluorescence setup
• special preparation of
diamond anvil cell
necessary!
• 1st experiments by
Manuela Borchert,
Karen Appel (DESY) and
Sylvain Petitgirard
(ESRF)
W. Morgenroth, Uni Frankfurt
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Outline
• PETRA III at DESY
• Extreme Conditions Beamline (ECB)
– off-axis laser heating
– on-axis laser heating
– fluorescence setup
– CO2 laser heating system
– Extreme Conditions Science Infrastructure
• Outlook
W. Morgenroth, Uni Frankfurt
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CO2 laser heating system
• at present: offline setup
in laser lab
• 100 W Synrad CO2 laser
• off-axis setup parallel to
the fiber laser
• one-sided heating
• for transparent samples
• power control using an
Acusto Optical Modulator
• commissioning in fall
2012
W. Morgenroth, Uni Frankfurt
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Outline
• PETRA III at DESY
• Extreme Conditions Beamline (ECB)
– off-axis laser heating
– on-axis laser heating
– fluorescence setup
– CO2 laser heating system
– Extreme Conditions Science Infrastructure
• Outlook
W. Morgenroth, Uni Frankfurt
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Extreme Conditions Science
Infrastructure (ECSI)
• sample preparation: microscopes, gasket preparation, furnaces,
glove box, …
• gas loading system for Ar, Ne, N2, He (at present: for symmetric
cells with membrane)
• preparation of Be gaskets is under safety evaluation (available
according to prior agreement)
• offline laser heating system (in commissioning)
• offline Raman system (in commissioning)
• offline Brillouin scattering system (by GFZ Potsdam)
Open for users with more or less (laser heating) experience!
(limited number of beginner groups)
W. Morgenroth, Uni Frankfurt
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Outlook
• pulsed laser heating: is in commissioning by Zuzana
Konôpková, Alexander Goncharov and Vitali Prakapenka,
available in 2014
• „pink beam“ option: available end of 2014
• installation of beam optics for „pink beam” in spring 2013
• shutdown due to PETRA III extension:
May till December 2013
• deadlines for new projects at DESY Photon Science
facilities:
1th of March and 1th of September (no call next March)
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Up to date information
Facilities / PETRA III / Beamlines / P02 Hard X-Ray Diffraction Beamline for
Time Resolved Studies
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Science beyond 4 Mbar and
using dynamic compression
workshop organized by DESY and European XFEL:
Liermann / Toleikis / Tschentscher
18th and 19th of October in Hamburg
List of speakers:
C. Barnes (LANL)
R. Collins (LLNL)
T. Duffy (Princeton)
L. Dubrovinsky (BGI)
S. Glenzer (LLNL)
A. Goncharov (GL)
T. Kenkmann (U Freiburg)
P. Loubeyre (CEA)
C. Pickard (UCL)
R. Redmer (U Rostock)
Ch. Schroer (TU Dresden)
T. Spohn (DLR)
C.-S. Yoo (U Wash. St)
W. Morgenroth, Uni Frankfurt
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Thank you
• Zuzana Konôpková, Hanns-Peter Liermann, Anita
Ehnes, Jan Torben Delitz, Bican Yilmaz (DESY)
• Alexandra Friedrich, Lkhamsuren Bayarjargal,
David Merges, Björn Winkler (Uni Frankfurt)
• SPP1236, DFG
• Funding by BMBF projects
05KS7RF1 and 05K10RFA
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