The Diagnostics Of Hydrogen-Cesium Plasma Using Fully Relativistic Electron Impact Cross Sections

Electron excitation cross-sections and rate coefficients have been calculated using fully relativistic distorted wave theory$^{\mathrm{1}}$for several fine-structure transitions from the ground as well as excited states of cesium atom in the wide range of incident electron energy. These processes play dominant role in low pressure hydrogen-cesium plasma relevant to the negative ion based neutral beam injectors for the ITER project$^{\mathrm{2}}$.The calculated cross-sections are used to construct a reliable collisional radiative (CR) model to characterize the hydrogen-cesium plasma$^{\mathrm{3}}$. The calculated plasma parameters are compared with the available experimental and theoretical results$^{\mathrm{4}}$.\newline R. K. Gangwar, L. Sharma, R. Srivastava and A. D. Stauffer, \textit{Phys. Rev. A} \textbf{81}, 05270 (2010). \underline {http://www.iter.org/newsline/139/330} \newline R.~K.~Gangwar, Dipti, R.~Srivastava and L.~Stafford, \textit{Plasma Sources Sci. Technol. }\textbf{25}, 035025 (2016). \newline D. W\"{u}nderlich, C. Wimmer and R. Friedl, \textit{J. Quant. Spectrosc. Radiat. Transf.} \textbf{149}, 360 (2014).