Optical Components
Our Mission
The research and development activities of the SNS Optical
Components Team (SNS-OCT) are divided into:
Conceptual design and construction of a neutron
optics test station (NOTS)
A neutron optics test station is designed for precise, comprehensive
studies of any contemporary wide-bandwidth neutron optical devices
and components to be used by the experimental facilities of the SNS.
Objects to be tested at NOTS include, but are not limited to supermirrors,
neutron guide segments, (remanent) polarizers, polarization analyzers,
beam benders, band pass filters, focusing devices, focusing monochromators,
multilayer monochromators, fiber lenses, toroidal mirrors, spin-flippers.
Design of a versatile neutron optics test station
Ch. Rehm, M. Agamalian, F. Klose
Paper -in preparation-
The Neutron Optics Test Station NOTS
Ch. Rehm, M. Agamalian, F. Klose
Poster <> American
Conference on Neutron Scattering, ACNS
2002
The Neutron Optics Test Station NOTS: Instrument performance estimated
by
Monte Carlo simulations
Ch. Rehm
Presentation <>
SNS/HFIR Instrumentation Workshop, 2002
 |
| Neutron optics test station (NOTS) at HFIR/Oak Ridge National
Laboratory |
Neutron supermirror studies
The performance of modern neutron scattering instruments highly
depends on the efficiency of their supermirrors. We have studied
the design of supermirrors, their current limitations, and outline
ideas for performance enhancement. Furthermore, radiation damage
on neutron supermirrors is investigated.
Flux gain for a next-generation neutron reflectometer resulting
from improved supermirror performance
Ch. Rehm, M. Agamalian
Paper - Poster <> International
Conference on Neutron Scattering, ICNS 2001
Flux gain for next-generation neutron-scattering instruments resulting
from improved supermirror performance
Ch. Rehm, M. Agamalian
Paper - Presentation <> SPIE
Annual Meeting 2001
Neutron supermirrors: Design and application
Ch. Rehm, M. Agamalian, F. Klose
Report <> SNS
Analysis of supermirror design
Ch. Rehm
Presentation <> SNS
Studies on residual stress
Residual stress in thin films affects the quality of neutron supermirrors.
A new technique was developed allowing to measure tension strain
in thin film-coated, thick Si substrates ("Neutron Camel").
Dynamical neutron-scattering measurements of residual stress in
a Si crystal coated with a thin film
M. Agamalian, E. Iolin, H. Kaiser, Ch. Rehm, S.A. Werner
Phys.
Rev. B 64 (2001) 161402(R)
A new dynamical diffraction-based technique of the residual stress
measurements in thin films
M. Agamalian, E. Iolin, H. Kaiser, Ch. Rehm, S.A. Werner
Paper - Poster <> International
Conference on Neutron Scattering, ICNS 2001
Propagation of neutron de Broglie waves inside the slot cut in a
single Si crystal
E. Iolin, S.A. Werner, M. Agamalian
Paper <> SPIE
Annual Meeting 2001
Design of core vessel and shutter inserts at SNS
J. Bailey
It is very crucial for the SNS instruments to have precisely aligned
beam guides, support structures, and vacuum systems. Neutron guides
with supermirror coatings on silica glass or similarly suitable substrates
are highly specialized optical components to efficiently channel
neutrons to the scattering instrument. Special inserts, designed
to contain these components, extending into the shutter and core
vessel regions are developed.
Testing of neutron focusing devices
M. Agamalian, C. Hoffmann
Since neutron focusing devices become more and more effective, we
are interested in incorporating such elements in the SNS instruments.
An elliptical neutron lens was tested with regard to its application
at the Single Crystal Diffractometer.
Conceptual design of a time-of-flight ultra-small-angle
neutron scattering instrument
We are developing conceptual designs for t-o-f USANS instruments
that allow the measurement of SANS data in the range of length scale
from 1000 Å to 200 µm for the structural characterization
of materials. The ultimate goal is to provide for the construction
of t-o-f USANS instruments at SNS.
Time-of-flight implementation of an ultra-small-angle neutron scattering
instrument
J.M. Carpenter, M.M. Agamalian, K.C. Littrell, P. Thiyagarajan,
Ch. Rehm
Paper <> International
Conference on Small-Angle Scattering,
SAS 2002
Time-of-flight ultra-small-angle neutron scattering instrument for
the SNS
M.M. Agamalian, J.M. Carpenter, K.C. Littrell, P. Thiyagarajan,
Ch. Rehm
Paper <> SPIE
Annual Meeting 2002
Time-of-flight ultra-small-angle neutron scattering instrument (TOF-USANS)
for SNS
M.M. Agamalian, J.M. Carpenter, K.C. Littrell, Ch. Rehm, P.
Thiyagarajan
Abstract <> American
Conference on Neutron Scattering, ACNS
2002
Contributors
Scientific and technical contributors in the SNS-OCT's activities include
the following: |
