Conventional explanations for observations of anomalous behaviour of mechanical systems during so... more Conventional explanations for observations of anomalous behaviour of mechanical systems during solar eclipses are critically reviewed. These observations include the work of Allais with paraconical pendula, those of Saxl and Allen with a torsion pendulum and measurements with gravimeters. Attempts of replications of these experiments and recent gravimeter results are discussed and unpublished data by Latham and by Saxl et al. is presented. Some of the data are summarized and re-analyzed. Especially, attention is paid to observations of tilt of the vertical, which seems to play an important role in this matter and recommendations for future research are given. It is concluded that all the proposed conventional explanations either qualitatively or quantitatively fail to explain the observations.
ABSTRACT In many SANS experiments there are much longer length scales interesting to probe than t... more ABSTRACT In many SANS experiments there are much longer length scales interesting to probe than the typical several hundred nanometre instrumental limit at present. These micron-size length scales can be probed using a method analogous to SESANS and MIEZE; a spatial modulation of the beam intensity with a Larmor precession technique. Measurements on a test instrument of this specific Larmor precession technique are in good agreement with the prediction. All components for this technique may fit in the collimator section of a conventional SANS instrument which makes the spectrometer sensitive for length scales from 1nm up till 100μm.
ABSTRACT Spin-echo small-angle neutron scattering (SESANS) is a real-space [1] scattering techniq... more ABSTRACT Spin-echo small-angle neutron scattering (SESANS) is a real-space [1] scattering technique that does not need any collimation to obtain high resolution. In this article, we present the SESANS instrument at the Delft University of Technology [2], which measures microstructures on length scales between 20 nm and 20 μm. In order to discuss the technical issues with the choice of precession devices, we will present the principle in this article in reciprocal space. We have applied the technique to a wide variety of samples, amongst which are colloidal phase transitions [3] and aggregation processes in dairy products [4]. In this article we show two other examples: artificial lattices [5] and cream cheese [6].
Conventional explanations for observations of anomalous behaviour of mechanical systems during so... more Conventional explanations for observations of anomalous behaviour of mechanical systems during solar eclipses are critically reviewed. These observations include the work of Allais with paraconical pendula, those of Saxl and Allen with a torsion pendulum and measurements with gravimeters. Attempts of replications of these experiments and recent gravimeter results are discussed and unpublished data by Latham and by Saxl et al. is presented. Some of the data are summarized and re-analyzed. Especially, attention is paid to observations of tilt of the vertical, which seems to play an important role in this matter and recommendations for future research are given. It is concluded that all the proposed conventional explanations either qualitatively or quantitatively fail to explain the observations.
ABSTRACT In many SANS experiments there are much longer length scales interesting to probe than t... more ABSTRACT In many SANS experiments there are much longer length scales interesting to probe than the typical several hundred nanometre instrumental limit at present. These micron-size length scales can be probed using a method analogous to SESANS and MIEZE; a spatial modulation of the beam intensity with a Larmor precession technique. Measurements on a test instrument of this specific Larmor precession technique are in good agreement with the prediction. All components for this technique may fit in the collimator section of a conventional SANS instrument which makes the spectrometer sensitive for length scales from 1nm up till 100μm.
ABSTRACT Spin-echo small-angle neutron scattering (SESANS) is a real-space [1] scattering techniq... more ABSTRACT Spin-echo small-angle neutron scattering (SESANS) is a real-space [1] scattering technique that does not need any collimation to obtain high resolution. In this article, we present the SESANS instrument at the Delft University of Technology [2], which measures microstructures on length scales between 20 nm and 20 μm. In order to discuss the technical issues with the choice of precession devices, we will present the principle in this article in reciprocal space. We have applied the technique to a wide variety of samples, amongst which are colloidal phase transitions [3] and aggregation processes in dairy products [4]. In this article we show two other examples: artificial lattices [5] and cream cheese [6].
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Papers by Chris Duif