Development of a thickness gauge for measuring thin materials

Abstract

Thickness gauges using nuclear techniques and radioactive sources are devised to measure the material thicknesses of the order of microns in a non-destructive manner without contacting the material. This allows for quality control by measuring the thickness during production and adjustment of the system in the case of a failure. The thickness gauge which is the subJect of my thesia study is designed to use gamma transmission method, In the transmission method,the set-up consists of the detector and the radioactive source placed at opposite sides of the material whose thickness is t o be measured. Unknown thicknesses can be found by using this thickness gauge with the and of calibration curves that have been prepared according to the source and the geometry used. Minhwn detection limits of various materials that can be rneaeused with this gauge have also been determined so as to give an idea about the accuracy of tne gauge.