West Coast Status Report

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West Coast Status Report Simon Clark and Raymond
Jeanloz Advanced Light Source, LBNL, Berkeley,
California, USA. Department of Earth and
Planetary Science, University of California,
Berkeley, USA. COMPPRES meeting, 22-28th June
2008 Cheyenne Mountain Resort
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Beamline 12.2.2 at the ALS
M. Kunz, A.A. MacDowell, W.A. Caldwell, D.
Cambie, R.S. Celestre, E.E. Domning, R.M. Duarte,
A.E. Gleason, J.M. Glossinger, N. Kelez, D.W.
Plate, T. Yu, J.M. Zaug, H.A. Padmore, R.
Jeanloz, A.P. Alivisatos, and S.M. Clark. J.
Synch. Rad. 12(5) 650-658 (2005).
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Major changes
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Personnel changes old
Martin Kunz
Sander Caldwell
Simon Clark
Jinyuan Yan
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Personnel changes new
Simon Clark
Jason Knight
Jinyuan Yan
Selva Vanilla Raju
Bin Chen
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Beamline changes 1
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Beamline changes 2
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Beamline changes 3
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Beamline changes 4
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Beamline changes 5
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Beamline changes 6
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Beamline changes 7
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HPlab changes
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HPlab changes continued
HP Brillouin Scattering Open to COMPRES users
from Jan 2009
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Laser heated radial diffraction
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The team
Rudy Wenk
Martin Kunz
Sander Caldwell
Lowell Miyagi
M. Kunz, W. A. Caldwell, L. Miyagi and H.-R. Wenk
In situ laser heating and radial synchrotron
X-ray diffraction in a diamond anvil cell Review
of Scientific Instruments 78, 063907 (2007).
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Laser heated radial diffraction
8 GPa, 300 K
1900 (?150) K
Start 0GPa, 300 K
Start heating 8GPa
16 GPa, 1800 (?150) K
11 GPa, 1900 (?150) K
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Imaging comes of age
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Happy Campers at the ALS 2008
Dave
Mike
Oliver
Simon
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Imaging layout
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(No Transcript)
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(No Transcript)
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Before
1st melting
Fe-FeS 55 200 kb
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(No Transcript)
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Liquid and amorphous scattering
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The team
Joe Zaug LLNL USA
Alan Soper ISIS facility RAL UK
Simon Clark ALS LBNL USA
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New diamond anvil cell
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Data collection strategy
225 micron diameter
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(No Transcript)
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Normalized data
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Determine density
3.19 GPa decompression s-? minimization contour
The standard deviation across the range of Q used
to compute density (8gtQlt10) was approximately /-
lt 5
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Variation of density with pressure
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Empirical potential structure refinement
Accept
Accept with probability
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(No Transcript)
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Effect of pressure on interatomic distances
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Effect of pressure on interatomic angles
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Summary

• New support team in place
• Diamond anvil cell and laser heating routinely
  working
• Axial and radial diffraction
• Imaging
• Liquid and amorphous
• Brillouin system available for expert COMPRES
  users now .
• . and available for general users from beginning
  of 2009

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Future developments

• Oliver Tschauner leading search for funds to
  exploit the single crystal system
• Additional temperature measurement systems being
  added to laser heated system in collaboration
  with Andrew Campbell
• Adding a laser heating system to the Brillouin
  system