Pellet injection into H-mode plasmas on DIII-D

Initial pellet injection experiments have been carried out on the DIII-D tokamak with a three barrel repeating pneumatic injector built at ORNL and originally operated on the JET tokamak. These experiments have investigated density perturbations from the injection of 1.8 mm and 2.7 mm deuterium pellets (1 {times} 10{sup 19}m{sup {minus}3} and 3{times} l0{sup 19}m{sup {minus}3} volume averaged density perturbations) into H-mode plasmas. In this paper we summarize the results from pellets injected into NBI heated H-mode plasmas