GSECARS Update

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GSECARS Update

• Now have 3 beamlines running 100 of the time
  13-ID-D (undulator), 13-BMD (bending magnet end
  station), 13-BMC (bending magnet side station,
  commissioning)
• Techniques available to the scientific community
• Diamond Anvil Cell energy-dispersive and
  monochromatic diffraction and spectroscopy
• Multi-anvil Press energy-dispersive and
  monochromatic diffraction and imaging (250 ton
  and 1000 ton press acoustics, tomography)
• Microprobe mXRF, mXAFS, mCMT, mXRD
• Microtomography absorption and edge CMT
• Surface scattering and spectroscopy CTR, XSW,
  reflectivity, GIXAFS.
• Extended X-ray Absorption Fine Structure (EXAFS)
• Microcrystal and powder diffraction
• Inelastic scattering in the DAC
• Brillouin spectroscopy in the DAC

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GSECARS User Program

• GSECARS allocates 100 of available beam time on
  the basis of reviewed proposals through web-based
  forms (both GSECARS and APS ratings).
• All GSECARS proposals are submitted through the
  APS General User Program.

3
GSECARS Funding

• NSF-EAR
• In Year 2 of 5 year operations. Flat budget for
  third year in a row. No money for equipment in
  FY2008

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GSECARS Funding (cont)

• DOE-BES
• Operations funding for GSECARS, 740K /year
• NSF-Geophysics
• Rheology Grand Challenge project contains 270K
  for post-doc and supplies for GSECARS.
• High-pressure tomography project. Funds ½
  post-doc with Yanbin Wang.
• NSF-EAR Nanoscale Research (NIRT)
• Award to U. Alaska (T. Trainor, PI 1.3M,
  2004-2008 310K subcontract to UofC (P. Eng, PI)
  supports postdoc

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GSECARS Funding

• NSF-Major Research Instrumentation (Complete, no
  funds remaining)
• X-ray optics to complete the 13-BM-C side
  station (550K 88K match 2004 2007)
• Another MRI grant to UNLV for single-crystal
  diffraction in DAC has 225 for CCD detector for
  GSECARS, received.
• COMPRES Infrastructure Projects (All complete, no
  funds remaining)
• CO2 Laser Heating Postdoc and laser system
  support
• Gas Loading Facility 118K equipment
• Multi-anvil Module Project 68K equipment
• Johnson Noise Thermometry Project 36K

6
Canted Undulator Upgrade

• Proposal submitted to APS SAC Dec. 2006, very
  positive response. APS will contribute 1.5M for
  undulators and front-end components
• Greatly increases time for high-pressure,
  microprobe is separated and runs 100 of time
• Allows new undulators optimized for high-energy
  (high-pressure) and low-energy (spectroscopy,
  microprobe)
• Unsuccessful in getting Univ. of Chicago MRI slot
  for Jan 2008.
• Now submitting split funding proposals to NASA,
  NSF, and DOE (700K each)

7

• Hardware Development Highlights
• (COMPRES Infrastructure Projects)
• ID-D CO2 heating laser
• Now commissioned in 13-ID-D. Tom Duffy talk at
  this meeting.
• Gas loading facility for DAC
• Gas loading system built by GSECARS with COMPRES
  funds, now available to all high-pressure users
  at the APS.
• Over 40 cells now loaded
• Progress report at this meeting.
• D-DIA30
• Being fabricated by Rockland Research. Progress
  report at this meeting.

8
GSECARS Personnel News

• Takeshi Sanehira, post-doc for Johnson noise
  thermometry project and GSECARS LVP, COMPRES and
  GSECARS funding. Will remain till end of 2008.
• Barbara Lavina. Post-doc for single-crystal DAC
  studies.
• Innokenty Kantor. Post-doc for DAC. His wife
  Anastasia is supported by Bayreuth but is also
  stationed at GSECARS
• Nadege Hilairet. Post-doc for rheology grand
  challenge
• Currently looking for post-doc for high-pressure
  tomography
• Alexei Kuznetsov, post-doc for CO2 laser heating
  development COMPRES and GSECARS funding has
  returned to Brazil
• Atsushi Kubo, post-doc for DAC has returned to
  Japan

9
LVP progress Technical development

• Modified Drickamer anvil cell for high T
  deformation above 30 GPa
• 6-6 multi-anvil cell for flexible D-DIA
  applications, Nishiyama et al., 2008
• DDIA-30, a COMPRES - GSECARS joint megabar
  multi-anvil development project
• Radiospectrometry and pressure effect on
  thermocouple e.m.f., a COMPRES - GSECARS joint
  project

10
6-6 MA cell test
second-stage anvils in cubic cell, vary from
run to run
Perm-anent first-stage anvils on edges
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LVP Program progress Science

• Rheology in D-DIA
• Serpentine and subduction zone dynamics, Hilairet
  et al., Science, 2007
• hcp iron and rheology of the inner core,
  Nishiyama et al., GRL, 2007
• Preferred orientation slip systems of
  post-perovskite CaIrO3, Miyagi et al., EPSL, 2008
• High-P tomography
• Equation of state of silicate glasses at high P
  and T, Lesher et al., PEPI, 2008
• Surface tension of Fe-S, Fe-P, and Ni-S melts at
  high pressure, Terasaki et al., PEPI, HPR, 2008
• High P-T crystallography
• Symmetry of CaSiO3 perovskite to 18 GPa and 2000
  K, Uchida et al., 2008, EPSL, in press
• High P melting
• Allende meteorite solidus and liquidus phases at
  high P, Danielson et al., 2007
• Fe-S, B. Chen et al., HPR, 2008
• Si melting curve, Kubo et al., Phys. Chem.
  Solids, 2008
• Ultrasonic elasticity and self-consistent
  equation of state
• MgSiO3 enstatites, Kung et al., GRL, 2005
• Mg2SiO4 ringwoodite, Li et al., 2005
• (Mg,Fe)2SiO4 wadsleyite, Liu et al., PEPI, 2008

12
Prakapenka et al., High Pressure Research, 2008
(in press)
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A gradual spin transition of iron occurs over a
pressure-temperature range extending from about
1000 kilometers in depth and 1900 kelvin to 2200
kilometers and 2300 kelvin in the lower mantle
Jung-Fu Lin, et al., Science 317, 1740 (2007)
15
Remarkable combination of in-situ high resolution
microdiffraction at HP/HT in DAC with optical
spectroscopy

• Brillouin spectroscopy
• Raman spectroscopy
• Fluorescent spectroscopy (ruby)
• Optical spectroscopy (500-1600 nm)

13-BM-D (GSECARS)
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Fit 577K
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GSECARS Near Term Goals

• Pursue funding and (hopefully) design and
  construction of canted undulators.
• Bring the 13-BM-C station fully online with
  scientific programs in interface diffraction and
  single-crystal diffraction at high pressure
• Complete D-DIA30 project
• Bring CO2 laser heating for the DAC in 13-ID-D
  into full user program