Small-angle scattering instrument SANS-2
SANS-2 is mainly dedicated to neutron small-angle scattering studies of precipitates, clusters, interfaces, grain sizes, magnetic structures etc. in materials like metals, ceramics, polymers and colloids using cold non-polarised and polarised neutrons (fig.1).
A special feature is that all components which define the sample environment are movable on air cushions. The sample environment area is variable from a few mm up to 2.5 m length. Thus SANS-2 is the most variable instrument for small angle scattering at GeNF.
- Fig.1 Schematic view of the small-angle scattering instrument SANS-2
The following sample environments are available:
- A conventional electro-magnet with a remote controlled sample changer. The vacuum chamber is directly connected to the collimator and detector tubes, so that samples can be measured without any windows. The magnetic field (up to 1.7 T) is horizontal. A closed cycle refrigerator with a temperature range from 10 K to 300 K is also available.
- A conventional electro-magnet with a vertical field (up to 1 T). An additional area detector can be moved around the sample in a distance of about 1m. This allows the simultaneous measurement of both the small angle scattering and the diffuse wide angle scattering (fig.2). The system contains a refrigerator (10 - 300 K) and a remote controlled sample changer.
- A superconducting magnet (up to 5 T) with a closed cycle refrigerator (10 - 300 K). Its magnetic field direction is parallel to the flight direction of the incident neutron beam.
- Chamber for large samples with a remote controlled sample changer. This set up can be operated either with vacuum (without windows) or with inert gas (e.g. He, etc.).
- A furnace especially for polymeric, biological or chemical samples (e.g. liquids or powders), temperature range from -30 to 250 °C. The furnace can be operated either with inert gas (e.g. He etc.) or in vacuum.
- Open sample table, with a rotating table, a tilting table and a linear translation table. This sample table can support equipment of external users such as furnaces, special sample holders, or other bulky and heavy instruments.
Local Contact: |
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Helmut Eckerlebe (GKSS) |
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phone: |
+49 (0)4152 87-1202 | |
fax: |
+49 (0)4152 87-1338 | |
e-mail contact: |
eckerlebe@gkss.de | |
Vadim Dyadkin (PNPI) |
dyadkin@lns.pnpi.spb.ru | |
Andrey Chumakov (PNPI) |
chumakov@lns.pnpi.spb.ru |