Speaker
Dr
Takuma Wakatsuki
(Japan Atomic Energy Agency)
Description
Reduction of magnetic flux consumption of a central solenoid (CS) during a plasma current ramp-up phase is investigated using an integrated modeling code suite (TOPICS). It is shown that 27% of the CS flux can be saved in DEMO reactor by 50 MW of EC heating at rho ~ 0.5. The plasma beta is kept low in this scenario. If a safety factor profile should not be a strongly reversed shear profile in order to avoid MHD instabilities, reduction of CS flux consumption is limited below 13% regardless of the electron density. This limitation can be relaxed if the heating profile becomes broad using multiple EC rays. Possibility of more advanced current ramp-up scenarios with no CS flux consumption has already been demonstrated for JT-60SA. As a result, requirement on heating and current drive sources, the plasma beta, a safety factor profile and a pressure profile are clarified when CS flux consumption is reduced by 10-100%.
| Country or International Organization | Japan |
|---|---|
| Paper Number | EX/P8-38 |
Primary author
Dr
Takuma Wakatsuki
(Japan Atomic Energy Agency)
Co-authors
Dr
Hirotaka Kubo
(Japan Atomic Energy Agency)
Dr
Junya Shiraishi
(Japan Atomic Energy Agency)
Dr
Nobuhiko Hayashi
(Japan Atomic Energy Agency)
Dr
Shunsuke Ide
(Japan Atomic Energy Agency)
Dr
Takahiro Suzuki
(Japan Atomic Energy Agency)
Dr
Yutaka Kamada
(Japan Atomic Energy Agency)
