Design and Simulation Of Elms Simulating Plasma (ESP) Gun

Abstract

Energy demand is increasing world wide because of industrial requirements. Fusion energy is the competent and promising source of electricity generation. Researches are going on through out the world on fusion energy. Plasma is source where fusion of nuclei can take place. Plasma is contained in a toroidal device called the TOKAMAK reactor. As tokamak reactors are under research, scientists around the world are fighting for so many instabilities like Edge Localized Modes. In Tokamak plasma, Edge Localized Modes (ELMS) are the repetitive bursts of energy from the outer low field side of plasma with a particular frequency. Cause of such events is heating of plasma more than a critical limit. So ELMS are the promising phenomenon to distort the Plasma Facing Components like first wall of vacuum vessel and diverter plates. In large size tokamak reactors there is a threat of welding and eroding of Plasma Facing Components due to such killing events. There are some methods available to mitigate such events like Edge current modulation, Pellet launching, Impurity injection, Edge ergodisation using external coils. It is good to simulate such events before the fabrication of a particular Tokamak reactor so that options can be found out to increase the life of a Plasma Facing Component. A device called ELMS Simulating Plasma Gun is simulated at Institute for Plasma Research with a dedicated software called IES to simulate ELMS events. ESP gun is designed and simulated part wise like main parts of ESP gun are Plasma Source, Plasma Confining Coils, and Plasma Facing Component. Finally whole ESP gun is simulated for ELMS events. Before simulation of ELMS events particle trajectory analysis is done in IES. Plasma Facing Component is simulated for thermal and structural deformation after strike of ELMS on the same in A_SYS.