Effect of ion-neutral collision on the deduction of plasma flow velocity

초록

A fluid theory on the ion collection has been developed for th deduction of flow velocity in unmagnetized plasma with high collisionality of neutrals and ions, which are to be applicable to the deduction of ExB shear flow in divertor pribate region of fusion devices and deduction of flow velocity in space and processing plasma. Experimental reinfication is performed by applying this fluid model to a collisional unmagnetized plasma generated by a dc plasma torch, comparing with theory by a collisionless kinetic theory and a particle-in-cell(PIC) simulation. Applicable range of these theories will be reviewed and the previously measured Mach probe data will be reanalyzed by considering collisional and low ion temperature(Ti=0.01Te)effects. Application to the deduction of ExB shear velocity in the pribate region of divertor will be addressed.