Speaker
Description
Blobs are observed in the scrape-off-layer (SOL) of various TOKAMAKs and fusion devices and opposes the core plasma confinement. SOL (the region characterized by open magnetic field lines) absorbs most of the plasma exhaust (particles and heat) and transports it along the field lines to the divertor plates. Hence, this region is of prime importance for future reactors. The operation of fusion reactors is significantly affected by blob transport in the SOL region. Blob transport and mitigation in the plasma SOL is of vital importance to the performance of existing and future magnetic confinement fusion devices. This important issue needs to be addressed for future fusion machines to get pure and cheap energy for mankind. In our experiment it is observed that some plasma particles and energy ejected out in the form of blobs from the plasma produced by a pulsed washer plasma gun which is injected radially to the curved vacuum chamber. The plasma parameters such as ion density n_i, electron density n_e and electron temperature T_e of plasma in presence of magnetic field and background plasma are estimated using various diagnostic techniques. The effects of magnetic field and background plasma on the plasma blob formation and mitigation processes are discussed.