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Methoden und Instrumentierung Poster: Mi., 14:00–16:30 M-P35
Proposal for a Novel Structured Pulse Engineering Spectrometer (SPES)
Reinhard Kampmann 1 , Martin Haese-Seiller 1 , Valery Kudryashov 1 , Andreas
Schreyer 1
1 GKSS-Forschungszentrum, Abteilung WFN, Max-Planck-Str. 1, 21502 Geesthacht
A novel ToF-system has been developed for the new structured pulse engineering spectrometer
(SPES) proposed by the GKSS-Research Centre for measuring both textures
and residual stresses. The chopper device of SPES is distinguished by two features:
On the one hand it allows for very high transmission of typically more than 5 % due
to the low resolution of its base pulses and on the other hand for very high resolution
(∆d/d < 2·10 −3 ) resulting from a novel pulse structuring technique. The transmission
of this chopper device is thus comparable to multi-burst techniques such as realized in
the pulse overlap ToF diffractometer (POLDI) at PSI and in Reverse-ToF instruments
at GKSS or in Gatchina/St. Petersburg which are designed for the analysis of residual
stresses. In contrast to these instruments, however, the SPES-chopper will allow for
measurements without pulse overlap and will, thus, offer excellent conditions for the
determination of position, shape and absolute intensity of peaks in highly symmetric
materials. Due to this chopper performance and the integration of a large and high
resolution 2D-detector system SPES will offer new perspectives for the combined analysis
of textures and strain fields. Finally, complex sample environments will be made
available for very different engineering applications.