This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1107/S0021889809017919 in citations.
Aspherical refractive lenses for small angle neutron scattering
Aspherical refractive lenses for small angle neutron scattering
Aspherical neutron lenses are discussed in detail as focusing elements for existing small-angle neutron scattering (SANS) diffractometers. The conceptual design can be obtained by analytical equations, while computer simulations provide the intensity distribution of the primary beam, which is strong...
Saved in:
Personal Name(s): | Frielinghaus, H. |
---|---|
Pipich, V. / Radulescu, A. / Heiderich, M. / Hanslik, R. / Dahlhoff, K. / Iwase, H. / Koizumi, S. / Schwahn, D. | |
Contributing Institute: |
Zentralinstitut für Technologie; ZAT JCNS; JCNS Streumethoden; IFF-4 Neutronenstreuung; IFF-5 |
Published in: | Journal of applied crystallography, 42 (2009) S. 681 - 690 |
Imprint: |
Copenhagen
Munksgaard
2009
|
Physical Description: |
681 - 690 |
DOI: |
10.1107/S0021889809017919 |
Document Type: |
Journal Article |
Research Program: |
Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) Kondensierte Materie |
Series Title: |
Journal of Applied Crystallography
42 |
Subject (ZB): | |
Publikationsportal JuSER |
Aspherical neutron lenses are discussed in detail as focusing elements for existing small-angle neutron scattering (SANS) diffractometers. The conceptual design can be obtained by analytical equations, while computer simulations provide the intensity distribution of the primary beam, which is strongly correlated with the instrumental resolution and the minimal momentum transfer Q. For large illuminated sample/lens areas of 50 mm diameter the aspherical lens design is essential, while spherical lenses are limited to ca 20 mm diameter with a 60% spherical aberration for standard SANS experiments. Scattering experiments on different samples proved the applicability and revealed the resolution limits of the two lens types. From theoretical considerations it is proposed that lens cooling can be used to reduce the thermal diffuse scattering. |