부산대학교 도서관

The efficiencies of the fueling system in the KSTAR have been studied for the 2013 experimentalresults. The absolute amount of injected fuel or deuterium has been calibrated in advance of themain plasma experiments. This includes the primary actuator of fueling, i.e., gas puffing (GP)with piezoelectric valves located on mid-plane, and supersonic molecular beam injector (SMBI). In addition, neutral beam injectors (NBIs) and their base facility chamber also contribute to theamount of fuel injection whenever they are operated. Low fueling efficiency combined with particleloss due to wall retention essentially results in poor performance of density feedback control magneticfusion devices such as the KSTAR.