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Displaying 26 - 49 of 49

The Effect of Gravity on the Resolution of Small-Angle Neutron Diffraction Peaks

October 1, 2011
Author(s)
David F. Mildner, John G. Barker, Steven R. Kline
The resolution ellipses for neutron diffraction peaks at small vectors lie along lines that point to a position vertically above the beam center. This gravity effect is only noticeable for neutron beams at long wavelenghts and with large wavelength spreads

Wolter Optics for Neutron Focusing

April 1, 2011
Author(s)
David F. Mildner, M. V. Gubarev
Focusing optics based on Wolter optical geometries developed for x-ray grazing incidence beams can be designed for neutron beams. Wolter optics are formed by grazing incidence reflections from two concentric conic sections (for example, a paraboloid and a

Neutron Transmission of Single-Crystal Magnesium Fluoride

November 27, 2008
Author(s)
John Barker, David F. Mildner, Jose Rodriguez Rivera, P. Thiyagarajan
The neutron attenuation through single-crystal magnesium fluoride has been measured as a function of wavelength at both room temperature and 77 K. These data confirm a total cross section that is lower than MgO for wavelengths greater than 0.2 nm. MgF 2

Neutron Collimation With Microchannel Plates: Calibration of Existing Technology and Near

April 1, 2007
Author(s)
A S. Tremsin, Daniel S. Hussey, David L. Jacobson, Muhammad D. Arif, Robert Gregory Downing, W B. Feller, David F. Mildner
A new type of high performance and compact neutron collimator can be manufactured from Gd- or B-doped microchannel plates (MCPs). Structures only a few mm thick have very narrow rocking curves and high out-of-angle rejection ratios, as observed previously

Metal Capillaries for Neutron Lenses

November 1, 1997
Author(s)
P. L. Reeder, A. J. Peurrung, D. S. Sunberg, J. J. Stoffels, Huaiyu H. Chen-Mayer, David F. Mildner, V. A. Sharov, V. S. Fokin
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