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Laser heating at P02

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									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

Þ Most brilliant 3rd generation high energy source:
Þ Positron beam with small horizontal emittance
Þ Small source in undulator produces a photon beam with very small divergence
Þ X-ray beam can be focused well
Þ Time resolved experiments in the Hz frequency range
                                     W. Morgenroth, Uni Frankfurt                         4
                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
                                                                General purpose table X-rays
                                                                Laser GP (right)
                                                           LH (left) heating table

                                    W. Morgenroth, Uni Frankfurt                               6
Laser heating table

                                    • X-rays and
                                      detector
                                    • Observation and
                                      spectrometer
                                      path
                                    • Fiber laser
                                    • Ruby laser and
                                      spectrometer




               detector

     W. Morgenroth, Uni Frankfurt                 7
Laser heating table
                     Observation path:
                     4 Ag coated glassy carbon 1
                     •
                       mirrors
                     • geoHEAT 60_NIR objectives
                                                   3
                     • Prosilica cameras directly
                     2
                       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

     W. Morgenroth, Uni Frankfurt                  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
                X-rays
                       of correlated color
                       temperature

     W. Morgenroth, Uni Frankfurt                      9
        Off-axis laser heating setup
Laser path:                                                      1
                                                         3   2       4   5
• 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 in-
   dependent of (re)alignment of
   observation path


                          W. Morgenroth, Uni Frankfurt                       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                     11
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               12
                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     13
On-axis laser heating




      W. Morgenroth, Uni Frankfurt   14
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
                 2    • therefore: this path will
                                               X-rays
                        include piShapers

      W. Morgenroth, Uni Frankfurt                 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                              1   2
  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)

                     W. Morgenroth, Uni Frankfurt           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               18
                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     19
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               20
                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     21
          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               22
                       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)

                       W. Morgenroth, Uni Frankfurt            23
       Up to date information
Facilities / PETRA III / Beamlines / P02 Hard X-Ray Diffraction Beamline for
Time Resolved Studies




                          W. Morgenroth, Uni Frankfurt                         24
           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   25
                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

                  W. Morgenroth, Uni Frankfurt   26

								
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