Neutron Optics


  • KAWABATA, Yuji e-mail: kawabata<atmark>

Associate Professor

  • HINO, Masahiro e-mail: hino<atmark>

Assistant Professor

  • ODA, Tatsuro e-mail: t_oda<atmark>

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Slow neutrons are very powerful and useful in various research fields, such as material and life sciences, fundamental physics, engineering. It is necessary for production of neutron beam to use any nuclear reaction and it requires a large facility to obtain high intensity of the neutron beam. Higher intensity is still desired even in an advanced large facility. As neutrons are electrically neutral, it is very difficult to control (bent) them. It is quite important for transportation and shaping of neutron beam from the source to the experimental instrument. We are developing various neutron optical devices, in particular high performance neutron multilayer mirrors, to control slow neutron beam precisely. Neutron supermirrors, which are used for neutron transport, are fabricated in our laboratory with highest performance in the world. We are also developing polarizing neutron mirror to control and analyze neutron spin.
Kyoto University and KEK have constructed a new beam line for the neutron resonance spin echo spectrometers (VIN ROSE: VIllage of Neutron ResOnance Spin Echo spectrometers) at BL06 in J-PARC/MLF. We named these spectrometers “VIN ROSE” wishing increase in the value with the passage of time and celebrating new scientific discovery. The VIN ROSE covers wide and unique space-time range with highest energy resolution. All neutron mirrors were fabricated and tested in our laboratory.
We are also exploring the new fields of neutron imaging (radiography). Neutrons have strong penetrating characteristics to metal and are sensitive to hydrogen in water or organic matters. So it is very powerful technique to investigate thermal fluid behavior in metallic tube. We are improving and applying the imaging technique to study many kinds of research fields like nuclear engineering, space engineering, agriculture and archaeology.


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Fig.1 Photographs of the VIN ROSE at BL06 at J-PARC/MLF. Fig.2 Photographs and three-dimensional image visualized by neutron radiography for flower (up) and iron ax from an ancient tumulus (down)