Study of the different parts of a tokamak using laser-induced breakdown spectroscopy

Abstract In the coming era, nuclear energy will play a big role in fulfilling the energy requirements of the world. Two major processes, nuclear fusion and nuclear fission, are useful for energy production. The present study is dedicated to fusion research where the consistent monitoring of safety walls, including LIBS analysis of different parts/components such as optical window, mirrors, flange, limiter, diverter, plasma dust, etc. of the Aditya tokamak located in Gandhinagar, India, is a leading challenge. LIBS study provides qualitative analysis to identify elemental constituents deposited on different plasma facing components (PFCs). In this chapter the calculation of the plasma parameters such as electron number density and plasma temperature along with quantitative analysis by calibration curve and calibration-free LIBS approaches is also discussed. The results clearly demonstrate the capability of the LIBS technique for the in situ and online analysis of PFCs of the tokamak.