XFEL Experiment 3160
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Zena Younes posted on 12. Sep. 2022 11:49h - last edited by Zena Younes on 30. May. 2023 17:52h

Sample NameHIBEF11
Desired Start P55 GPa
Contents:Sample

Coupler materials

Coupler thickness (µm)

Coupler hole diameter (µm)
1.MgOCu (x 2)3

N/A

Diamonds:Culet diameter(s) & style(s)Cylinder Dia. ThicknessPiston Dia. ThicknessDiamond Types

300 µm1.604 mm2.152 mm1a
Gasket:MaterialInitial Thickness

Regular gasket: hole diameter



Re27.9 µm132.5 µm
Cell Configuration:

Downstream Side
i.e. cylinder (default), piston

Downstream Seat
e.g. BA, BN, Slot...

Upstream Seat
e.g. WC std...

Standard Rotation
(mark that is always 'up', e.g. "Cell number on piston".  Slots should always be vertical.)

Cylinder BAWC Black arrow
Cell Checks:

Screw Heads  protruding?
(Should be N)

Set screws disengaged?
(Should be Y)

Imperial or Metric Screws?

Offline P Change?
(should be N)

NNMetricN
Current Pressure (GPa):Diffraction Best valueRubyDiamond EdgeSample Raman


55.1 (centre), 60.9-56.2 (outside)

Pressure decrease:
Centre: 37.5


Photomicrographs:
1) with mark up (or note direction of mark)
2) Include labels, sketch for very complex samplews.

















View(s) from cylinder side (with mark up, or note direction of mark otherwise) INSERT PHOTO OF CELL FROM MICROSCOPE, AND PHOTO OF DAC SHOWING ORIENTATION


View(s) from piston side (with mark up, or note direction of mark otherwise) INSERT PHOTO OF CELL FROM MICROSCOPE, AND PHOTO OF DAC SHOWING ORIENTATION


Interference Fringes
1) note pressure
2) note index of refract.
3) include raw calcs

Chamber
(culet-to-culet)		Downstream Medium(s)

Upstream Medium(s)

Index of Refraction

nd=30.4, piston side 16.7 large, 19.7 small, cylinder side 7.1 large, 3.7 small
based on optimising index to get correct foil thickness for both, n~2.3 or so but thicknesses get quite small, n~1.7 could be more accurate.

MgO
1.7 or 2.3 depending.

XRD Screening













499px

Data

MgO, 50GPa

Cu (big foil) 56GPa. Re contamination.


Cu (small foil) 61 GPa. Unidentified contamination, strong signal (green ring).





Grid

POST MORTEM GRID:
ALL CELLS WERE AIGNED THE WAY THEY WERE IN THE XFEL LOG!

0.003step  x 0.008step (41z x15y)

Initial images







0 GPa

Pressure decreased to: 

Centre: 37.5 GPa (1416.8cm-1, DESY Raman), Centre 2 : 36.4 (1414.3cm-1)
Left: 34.2 GPa  (1409.9cm-1)
Right: 35.7 GPa (1413.1cm-1)
Top: 25.6 GPa (1391.5cm-1) → Halfway between centre ant top: 30.4 GPa (1401.7cm-1)
Bottom: 35.7 GPa (1413.2cm-1)

Phase Diagrams







Any Relevant Phase Diagrams & References

Beamline Analysis





Postscreening

aligned with respect to upstream camera image in elog (no downstream camera image available)→ flipped the cell (keeping the same orientation)

Photos with same attempted orientation:

c2c nd=30.9 on decompression, very close to HP value

assume other dimensions also not changing much

c2c distance unloaded 13 um 




Notes



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