A neutron lens

@article{Kumakhov1992ANL,
  title={A neutron lens},
  author={Muradin Abubekirovich Kumakhov and V. A. Sharov},
  journal={Nature},
  year={1992},
  volume={357},
  pages={390-391}
}
SMOOTH hollow glass capillaries can be used to guide neutrons by multiple reflection at grazing angles along the inner walls. Here we show that a concentric arrangement of bent capillaries makes it possible to focus and increase the flux density of a neutron beam—a phenomenon that will have applications in areas such as prompt-gamma activation analysis and neutron depth profiling. 
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Neutron beam bending on large angles by capillary systems
The experimental and theoretical results on bending of thermal neutron beams by means of polycapillary structures are presented. It is shown that neutron beams may be bent on large angles (up to 30… Expand
Neutron focusing lens using polycapillary fibers
Multiple mirror reflection at small grazing angles from the smooth surfaces of the narrow channels of polycapillary fibers can be used to transport, bend, and focus thermal neutron beams. We report… Expand
Guiding and focusing neutron beams using capillary optics
A METHOD for focusing X-rays by means of internal reflection inside hollow glass capillaries1–3has also been shown to be capable of guiding a neutron beam4 and now a neutron lens using this principle… Expand
Cold neutron guiding and focusing
Neutron guides using reflective optics are used to transport thermal neutron beams. Narrow channels enable the neutron beam to be bent more sharply than with wide guides. Recent developments in… Expand
Fresnel zone plates as neutron optical elements for neutron imaging
Abstract We present the operation of a matrix of Fresnel zone plates consisting of 900 individual zone plates. The individual efficiency of the zone plate lenses is close to 30% for λ =13.7 A. We… Expand
Gain for neutron polycapillary lens as a function of wavelength
A focusing lens using glass polycapillary fibers has achieved a current density gain of 80 for a polychromatic beam from a cold-neutron guide. The intensity gain of a lens depends on both the… Expand
Capillary Neutron Optics for Boron Neutron Capture Therapy
Glass capillaries with narrow channels (diameters of a few microns) can guide and bend thermal and cold neutrons by means of multiple total external reflection. Capillary neutron optics, which… Expand
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References

SHOWING 1-3 OF 3 REFERENCES
Guiding and focusing neutron beams using capillary optics
A METHOD for focusing X-rays by means of internal reflection inside hollow glass capillaries1–3has also been shown to be capable of guiding a neutron beam4 and now a neutron lens using this principle… Expand
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Abstract The present work formulates the basic concepts of multiple reflection X-ray optics which employs the special geometry of reflecting surfaces. The problems of the X-ray beam transport and… Expand
Channeling of photons and new X-ray optics
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