@misc{oai:repo.qst.go.jp:00072178,
 author = {Wakatsuki, Takuma and 鈴木, 隆博 and 林, 伸彦 and 白石, 淳也 and 坂本, 宜照 and 井手, 俊介 and 久保, 博孝 and 鎌田, 裕 and 若月 琢馬 and 鈴木 隆博 and 林 伸彦 and 白石 淳也 and 坂本 宜照 and 井手 俊介 and 久保 博孝 and 鎌田 裕},
 month = {Oct},
 note = {The method for reducing a poloidal magnetic flux consumption of external coils is investigated to reduce the size of a central solenoid (CS) in DEMO reactor. The reduction of the poloidal magnetic flux consumption during a plasma current ramp-up phase by the electron cyclotron (EC) heating is investigated using an integrated modeling code suite, TOPICS. A strongly reversed shear q profile tends to be produced if intense off-axis EC heating is applied to obtain a large reduction of the flux consumption. However, we have found the scheme to minimize the poloidal flux consumption for all the specific time evolution of the q profile through the optimization of the electron temperature profile. We have also quantified the lower limit of the flux consumption which is determined by the q profile at the end
of the current ramp-up when almost all the current is driven inductively. As a result, it is clarified that the poloidal magnetic flux consumption can be reduced by 20% using 20-31 MW of EC heating maintaining a weakly reversed shear q profile. This reduction of the flux consumption accounts for 10% reduction of the CS radius., 26th IAEA Fusion Energy Conference},
 title = {Reduction of CS flux consumption during plasma current ramp-up on DEMO reactor},
 year = {2016}
}