SESAME First Phase Beamlines:

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SESAME First Phase Beamlines Powder Diffraction
Beamline
By Engin Ozdas
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The powder diffraction is the principal technique
for the determining the structure of materials
that do not readily form large ordered crystals.
In most laboratories the production of
diffraction-quality crystals may be months (or
years) behind new discoveries.
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It is the technique of choice for the analysis of
novel materials where synthesis is undeveloped or
highly strained materials subject to twinning. In
certain cases, for example in mineral processing
or in the study of materials under extreme
conditions, powder diffraction can be the optimum
method for material research.
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It has the advantage of a relatively simple
scattering geometry and has been aided by the
development of the intense sources of synchrotron
radiation and advances in data analysis using
modelling, direct methods and global optimisation
methods.
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In recent years, powder diffraction has provided
crucial structural information for many
strategically important materials including high
temperature superconductors, fullerenes, oxides,
mesoporous materials and assembled nanoscale
assemblies.
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• Powder diffraction
• Thin Film Measurements
• Reflectometry
• Reflectometry diffuse scattering
• Residual stress and texture
• Phase transitions at low high T
• Kinetic studies at high T

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• Source
• Energy Range 3-25 keV
• Resolution DE/E 10-4
• Image size 1mmx5mm
• A heavy duty 2-axis goniometer with two 2q arm
  or modular 2q arm
• Analyzer dedector stages on 2q arm
• Soller slits
• X-y plate rotation stages for texture and
  stress measurements
• Dedector - Multiwire
• - CCD
• - Scintillation
• Beam and sample monitoring system

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• Non Ambient Sample Envoirement
• Phase transition studies
• close cycle He refrigerators or
• He cryostat 2-300 K
• Kinetic studies
• Electric furnace T lt 1000K
• RF Furnace T lt 2400K
• High Pressure (lt 100 GPa)
• P-T (lt 100 GPa and lt 3500 K)
• Offline Laboratory Facilities
• Materials Lab
• Glove Box
• Fume
• Furnaces
• Sample alignment utilities etc.

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• User community
• The beamline is likely to be used researchers
  who are not expert in synchrotron techniques and
  so it will be designed to be simple use and
  adjust. It will be supported by the neccesary
  analytical algorithms to ensure rapid online
  phase analysis.
• Organization of the national training programs
  for the possible user