Water Sensitivity
Neutrons are extremely sensitive to small amounts of water. To quantify and
calibrate this sensitivity we use known thicknesses of water and measure this
effect directly. Using a wedge of water formed by incrementally milling steps
in a block of aluminum a well known range of steps are formed from
0.050 mm to 2 mm in increments of 0.050 mm. Radiographs of the
wedge when wet and dry can be compared to yield the water steps alone. From
this the sensitivity of the method can be shown. |
Steps machined in increments of 0.050 mm. |