The Copper Half Value Layer attenuator set from Sun Nuclear (formerly Gammex) has 9 sheets of pure copper with thickness ranging from 0,1 mm to 2,0 mm, with a surface of 10 x 10 cm.
Set content
- 4x 0,1 mm
- 1x 0,25 mm
- 1x 0,5 mm
- 2x 1,0 mm
- 1x 2,0 mm
The set also comes with a protective storage case to help maintain the flatness of the filters.
You use this set to determine the HVL (Half Value Layer): the necessary material quantity for cutting the intensity of an x-ray beam in half.

COPPER HALF VALUE LAYER SPECIFICATIONS
- Made of pure copper
- Sheets are 10 x 10cm (4″ x 4″)
- The set weighs 0,55 kg (1,1 lbs)
- The set contains of 9 sheets ranging in thickness
- Comes with plastic storage case
If you want to read more about HVL sets, try this page!