Neutron Double Converging

Throughout the years, many types of Neutron Double Converging Collimators have been produced by JJ X-Ray. The double converging collimator is an advanced radial collimator where foils are angled both in the vertical and horizontal plane and often with very small angular foil separation.

As with our Radial Collimators, they include intermediate collimation systems over larger angular ranges and finer collimation systems over smaller angular ranges. Se also examples in our collimator catalog.

Especially with our larger designs, limiting the total system weight has been at the center of our attention.

For further details, please click on the design parameters.

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Technical specifications

Angular range 
Up to 45 degrees horizontally and 60 degrees vertically

Aperture size

Angle between foils
From <0.1 degrees to several degrees

80-125 µm thick Gadolinium Oxide or Boron-10 coated PETP or Kapton Foil

Aluminum with thickness determined by collimation requirements

Open apertures are delivered with thin protective aluminum covers

Common options
Coatings can be various alternative materials
The frame may be coated with absorbing material
Vacuum compatible parts and coatings can be furnished
Extra dense foil coatings may be furnished for lower resolution collimators to limit cross-talk.
Non-magnetic materials
Fixtures and lifting positions