Environment: ROOT-based Qt Application
The modern trends in use of the small-angle scattering method consist in
varying a sample environment, e.g. temperature, pressure, magnetic or
electric fields. The objects under investigation can be oriented in the
field or by the flow of a liquid. In this case the need for the
position-sensitive detector (PSD) arises.
The position-sensitive detector of the new type has been created for the
YuMO spectrometer [1]. Currently, this spectrometer has a two-detector
system with coaxial ring detectors with a central hole and does not have
azimutal angle sensitivity. And the SAS package [2] is used for its data
treatment. PSD is planed to be mount either in the place of one of YuMO
detectors, or in addition to them (turning it into three-detector
system). And the problem of PSD data processing is actual.
Due to small size of PSD cells statistics in them is often poor. That
fact negatively impacts on data treatment. On the other hand, in most of
the experiments one needs isotropic pattern of scattering only, when
objects in a sample are not oriented. Thus in most cases is possible to
combine PSD cells into concentric rings what first improves statistics
and finally makes applicable the algorithms already used for data
processing in SAS.
Downloads: https://gitlab-hybrilit.jinr.ru/yumo-updates/psd2sas
Fig.1: PSD rings pattern.
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Fig.2: Time spectra for rings shown in Fig.1,
ready for processing in SAS.
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References:
- YuMO spectrometer
- SAS - Package for small-angle neutron scattering data treatment
