Neutron and X-ray Tomography instrument

NeXT (Neutron and X-ray Tomography) is an instrument that hosts two complementary imaging set-ups, the first using neutrons and the second using X-rays as probes. They can be operated simultaneously.

NeXT is located at the end of the H521 guide shared with D16 and SuperADAM.


  • 2D and 3D neutron imaging with a field of view of up to 170x170 mm2, and real pixel resolution of <10 microns.
  • Complementary 2D and 3D X-ray imaging with a field of view of 250x300 mm2, and real pixel resolution of 5 microns.

Instrument layout

A white neutron beam (wavelengths between 2 Å and 20 Å.) passes through a pinhole that acts as a primary source. The diverging beam travels a distance of 10 m  and arrives to the Imaging station.
The sample is placed on a rotation table at the end of the flight tube. Behind the sample, a neutron detector allows to take an image of the sample in transmission. Several images are acquired at different angles, which allows for reconstructing, using the Fourier Slice Theorem, the three dimensional absorption maps of the object.
Perpendicular to the neutron beam, an ensemble X-ray generator / detector allows to take a complementary X-ray image of the same sample.
Further info on the imaging setup: