SESANS Reproducibility Working Group

The spin-echo SANS (SESANS) working group is a subgroup of the canSAS Reproducibility and Reliability Working Group.

Mission

Spin-echo small-angle neutron scattering (SESANS) is a variant of small-angle neutron scattering that uses the Larmor precession of polarised neutrons to study the structure of materials in real space and up to length scales of some ten micrometer.

The mission of this group is to achieve SESANS measurements that provide data on an absolute scale independent from the used instrument. They do this by discussing the development of standard calibration samples and considering issues of reproducibility between different instruments, ensuring that data are trustworthy, reliable, and comparable.

Members

• Wim Bouwman (TU Delft)
• Robert Dalgliesh (ISIS Neutron and Muon Source)
• Henrich Frielinghaus (Jülich Centre for Neutron Science, MLZ)
• Fankang Li (Oak Ridge National Laboratory)
• Andrew Parnell (The University of Sheffield)
• Steven Parnell (TU Delft)
• Roger Pynn (Indiana University Bloomington)
• Gregory Smith (Chair, ISIS Neutron and Muon Source)

News and Status

• 30 November 2021: Discussion of recent measurements of possible standard samples and plans for next test measurements.
• 22 March 2021: Inaugural meeting of the group.

Data Repository

Data from possible standards can be shared on the working group's Zenodo community.

Data will be reviewed to ensure that they comply with current file standards (*.ses) before acceptance.

SESANS Instruments

• Larmor instrument at ISIS Neutron and Muon Source (UK) ISIS Larmor
• SESANS instrument at Reactor Institute Delft, TU Delft (The Netherlands) Research instruments SESANS
• SESANS at Oak Ridge National Lab (USA) SESANS 1-D Ultra Low Q Small Angle Neutron Scattering